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You searched for +publisher:"University of Twente" +contributor:("Talma, Auke"). Showing records 1 – 3 of 3 total matches.

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1. Sadatshirazi, S. Aromatic polyamide short fibres-reinforced elastomers: adhesion mechanisms and the composite's performance properties.

Degree: Faculty of Engineering Technology, 2012, University of Twente

The current thesis consists of a chapter as literature review in which different scientific sources and the results of investigation of various researchers are reviewed, followed by 5 chapters (2 to 6) and an appendix covering the results of the experimental work performed. The results can be divided in 3 main sections: Section 1: Short-fibre rubber composites. In the first section rubber composites reinforced with short aramid fibres are focused upon; the reinforcement mechanisms and the mechanical and viscoelastic properties of the composites are explored. • In the second chapter, short fibre reinforced NR and EPDM rubbers are the subjects of investigation. In the different short fibre-rubber systems examined, clear chemical adhesion only happened in the case of peroxide-cured EPDM with RFL-treated fibres. This phenomenon was most clearly reflected in the tensile curves for this system, showing a large reinforcement factor particularly at tensile elongations below 100%. Next to potential chemical bonding, mechanical interaction between fibres and rubber matrix plays an important role. Surface phenomena on the fibres, as bending/buckling, dog-bone shaped fibre ends and surface roughness due to the RFL-coating cause mechanical interlocking. So, even in the absence of chemical adhesion, adding short aramid fibres improves the mechanical properties of rubber compounds because of the mechanical interaction. • Chapter three describes the results of the investigation of the composite morphology and interaction of two different types of short aramid fibres in an EPDM radiator hose compound and its corresponding model system. PPTA fibres with RFL-dip could not be dispersed completely to filament level due to the gluing effect of the dip. Irrespective of the mixing time, PP/ODPTA fibres could better withstand the applied shear stresses during mixing and maintain a high level of fibre length, which resulted in better mechanical properties in composites reinforced with these fibres compared to those reinforced with PPTA fibres. On the other side, the RFL-dip acted as protective layer and prevented the fibres from excessive breaking, which was especially the case for PPTA. It was shown that for RFL-coated fibres, chemical bonding only happens between a part of RFL-treated filaments and EPDM rubber. Still the composites containing these fibres showed better mechanical properties compared to those reinforced with standard finish. The reason for this superiority is not only the partial chemical bonds, but two more factors are involved: better mechanical interlocking of the RFL-treated fibres and the surrounding matrix (due to the roughness of the coating), and the higher final length of these fibres after mixing. • Due to the importance of viscoelastic properties in performance of a lot of rubber parts, especially tires, the dynamic properties of the short fibre-reinforced compounds are the subject of the fourth chapter. It was shown that mechanical and chemical interactions between short fibres and a rubber matrix, which are the… Advisors/Committee Members: Noordermeer, Jacobus W.M., Talma, Auke, Elastomer Technology and Engineering.

Subjects/Keywords: IR-82218; METIS-289311

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APA (6th Edition):

Sadatshirazi, S. (2012). Aromatic polyamide short fibres-reinforced elastomers: adhesion mechanisms and the composite's performance properties. (Doctoral Dissertation). University of Twente. Retrieved from https://research.utwente.nl/en/publications/aromatic-polyamide-short-fibresreinforced-elastomers-adhesion-mechanisms-and-the-composites-performance-properties(0e5ac49d-29dd-4e65-b647-991554f883be).html ; urn:nbn:nl:ui:28-82218 ; 0e5ac49d-29dd-4e65-b647-991554f883be ; 10.3990/1.9789036534628 ; urn:isbn:978-90-365-3462-8 ; urn:nbn:nl:ui:28-82218 ; https://research.utwente.nl/en/publications/aromatic-polyamide-short-fibresreinforced-elastomers-adhesion-mechanisms-and-the-composites-performance-properties(0e5ac49d-29dd-4e65-b647-991554f883be).html

Chicago Manual of Style (16th Edition):

Sadatshirazi, S. “Aromatic polyamide short fibres-reinforced elastomers: adhesion mechanisms and the composite's performance properties.” 2012. Doctoral Dissertation, University of Twente. Accessed August 13, 2020. https://research.utwente.nl/en/publications/aromatic-polyamide-short-fibresreinforced-elastomers-adhesion-mechanisms-and-the-composites-performance-properties(0e5ac49d-29dd-4e65-b647-991554f883be).html ; urn:nbn:nl:ui:28-82218 ; 0e5ac49d-29dd-4e65-b647-991554f883be ; 10.3990/1.9789036534628 ; urn:isbn:978-90-365-3462-8 ; urn:nbn:nl:ui:28-82218 ; https://research.utwente.nl/en/publications/aromatic-polyamide-short-fibresreinforced-elastomers-adhesion-mechanisms-and-the-composites-performance-properties(0e5ac49d-29dd-4e65-b647-991554f883be).html.

MLA Handbook (7th Edition):

Sadatshirazi, S. “Aromatic polyamide short fibres-reinforced elastomers: adhesion mechanisms and the composite's performance properties.” 2012. Web. 13 Aug 2020.

Vancouver:

Sadatshirazi S. Aromatic polyamide short fibres-reinforced elastomers: adhesion mechanisms and the composite's performance properties. [Internet] [Doctoral dissertation]. University of Twente; 2012. [cited 2020 Aug 13]. Available from: https://research.utwente.nl/en/publications/aromatic-polyamide-short-fibresreinforced-elastomers-adhesion-mechanisms-and-the-composites-performance-properties(0e5ac49d-29dd-4e65-b647-991554f883be).html ; urn:nbn:nl:ui:28-82218 ; 0e5ac49d-29dd-4e65-b647-991554f883be ; 10.3990/1.9789036534628 ; urn:isbn:978-90-365-3462-8 ; urn:nbn:nl:ui:28-82218 ; https://research.utwente.nl/en/publications/aromatic-polyamide-short-fibresreinforced-elastomers-adhesion-mechanisms-and-the-composites-performance-properties(0e5ac49d-29dd-4e65-b647-991554f883be).html.

Council of Science Editors:

Sadatshirazi S. Aromatic polyamide short fibres-reinforced elastomers: adhesion mechanisms and the composite's performance properties. [Doctoral Dissertation]. University of Twente; 2012. Available from: https://research.utwente.nl/en/publications/aromatic-polyamide-short-fibresreinforced-elastomers-adhesion-mechanisms-and-the-composites-performance-properties(0e5ac49d-29dd-4e65-b647-991554f883be).html ; urn:nbn:nl:ui:28-82218 ; 0e5ac49d-29dd-4e65-b647-991554f883be ; 10.3990/1.9789036534628 ; urn:isbn:978-90-365-3462-8 ; urn:nbn:nl:ui:28-82218 ; https://research.utwente.nl/en/publications/aromatic-polyamide-short-fibresreinforced-elastomers-adhesion-mechanisms-and-the-composites-performance-properties(0e5ac49d-29dd-4e65-b647-991554f883be).html

2. Zielinska, A.J. Cross-linking and modification of saturated elastomers using functionalized azides.

Degree: Faculty of Engineering Technology, 2011, University of Twente

The main advantage of saturated elastomers, such as EPM and EPDM over their unsaturated counter-parts is the absence of carbon-carbon unsaturation in the main polymer chain, resulting in excellent ozone and heat resistance. A consequent disadvantage of the absence of unsaturation is the lack of reactivity of these saturated elastomers. Such reactivity is desired for cross-linking, providing the typical rubber properties like high tensile strength, elasticity and resistance to solvents, and/or for further chemical functionalization of the polymer chain, which yields polymers with increased polarity or reactivity and, thus, enhanced adhesion to polar substrates or compatibility with other polar polymers. The common way to overcome the lack of reactivity for saturated polymers is by pursuing free-radical reactions, usually initiated by thermal decomposition of peroxides. Peroxide cross-linking of EP(D)M-rubbers is commercially applied and also grafting of unsaturated monomers onto EP(D)M, for example maleic anhydride (MA), initiated by peroxides is performed on an industrial scale. A major disadvantage of peroxide-induced reactions is lack of selectivity which leads to a number of side reactions, the most common being disproportionation of two macro-radicals and β-scission which results in polymer degradation. Organic azides are a class of organic compounds that are known for their reactivity towards saturated hydrocarbons. Hence, it is interesting to study their performance in cross-linking/modification of saturated EP(D)M-rubbers. Upon heating nitrogen is split off from the azides and the resulting nitrene R-N species insert into a C-H bond. This reaction mechanism is expected to be completely different from the radical processes resulting from peroxides and, most importantly, no side reactions are likely to occur. The purpose of this thesis is therefore to investigate azides as viable alternatives for peroxides in cross-linking and grafting of saturated elastomers, in particular EP(D)M. Advisors/Committee Members: Noordermeer, Jacobus W.M., Talma, Auke, Elastomer Technology and Engineering.

Subjects/Keywords: METIS-284344; IR-77592

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APA (6th Edition):

Zielinska, A. J. (2011). Cross-linking and modification of saturated elastomers using functionalized azides. (Doctoral Dissertation). University of Twente. Retrieved from https://research.utwente.nl/en/publications/crosslinking-and-modification-of-saturated-elastomers-using-functionalized-azides(c2f047a3-86d7-4f96-9cbc-1c040dd27127).html ; urn:nbn:nl:ui:28-77592 ; c2f047a3-86d7-4f96-9cbc-1c040dd27127 ; 10.3990/1.9789036532082 ; urn:isbn:978-90-365-3208-2 ; urn:nbn:nl:ui:28-77592 ; https://research.utwente.nl/en/publications/crosslinking-and-modification-of-saturated-elastomers-using-functionalized-azides(c2f047a3-86d7-4f96-9cbc-1c040dd27127).html

Chicago Manual of Style (16th Edition):

Zielinska, A J. “Cross-linking and modification of saturated elastomers using functionalized azides.” 2011. Doctoral Dissertation, University of Twente. Accessed August 13, 2020. https://research.utwente.nl/en/publications/crosslinking-and-modification-of-saturated-elastomers-using-functionalized-azides(c2f047a3-86d7-4f96-9cbc-1c040dd27127).html ; urn:nbn:nl:ui:28-77592 ; c2f047a3-86d7-4f96-9cbc-1c040dd27127 ; 10.3990/1.9789036532082 ; urn:isbn:978-90-365-3208-2 ; urn:nbn:nl:ui:28-77592 ; https://research.utwente.nl/en/publications/crosslinking-and-modification-of-saturated-elastomers-using-functionalized-azides(c2f047a3-86d7-4f96-9cbc-1c040dd27127).html.

MLA Handbook (7th Edition):

Zielinska, A J. “Cross-linking and modification of saturated elastomers using functionalized azides.” 2011. Web. 13 Aug 2020.

Vancouver:

Zielinska AJ. Cross-linking and modification of saturated elastomers using functionalized azides. [Internet] [Doctoral dissertation]. University of Twente; 2011. [cited 2020 Aug 13]. Available from: https://research.utwente.nl/en/publications/crosslinking-and-modification-of-saturated-elastomers-using-functionalized-azides(c2f047a3-86d7-4f96-9cbc-1c040dd27127).html ; urn:nbn:nl:ui:28-77592 ; c2f047a3-86d7-4f96-9cbc-1c040dd27127 ; 10.3990/1.9789036532082 ; urn:isbn:978-90-365-3208-2 ; urn:nbn:nl:ui:28-77592 ; https://research.utwente.nl/en/publications/crosslinking-and-modification-of-saturated-elastomers-using-functionalized-azides(c2f047a3-86d7-4f96-9cbc-1c040dd27127).html.

Council of Science Editors:

Zielinska AJ. Cross-linking and modification of saturated elastomers using functionalized azides. [Doctoral Dissertation]. University of Twente; 2011. Available from: https://research.utwente.nl/en/publications/crosslinking-and-modification-of-saturated-elastomers-using-functionalized-azides(c2f047a3-86d7-4f96-9cbc-1c040dd27127).html ; urn:nbn:nl:ui:28-77592 ; c2f047a3-86d7-4f96-9cbc-1c040dd27127 ; 10.3990/1.9789036532082 ; urn:isbn:978-90-365-3208-2 ; urn:nbn:nl:ui:28-77592 ; https://research.utwente.nl/en/publications/crosslinking-and-modification-of-saturated-elastomers-using-functionalized-azides(c2f047a3-86d7-4f96-9cbc-1c040dd27127).html

3. Guo, R. Improved properties of dissimilar rubber-rubber blends using plasma polymer encapsulated curatives : a novel surface modification method to improve co-vulcanization.

Degree: 2009, University of Twente

In industrial applications, different rubber types are often blended to fine-tune or optimize the property portfolio required for successful performance of articles. Considering the complexity of a rubber blend compound, wherein numerous additives are involved, vulcanization or cure mismatch often occurs as an outcome of inhomogeneous distribution of the curatives or imbalanced reactivities of the different rubber phases towards the curatives. The solubility study of various curatives in different rubbers was measured with an easy and effective method based on weight up-take by the migration of curative molecules into slightly pre-crosslinked rubbers. The experimental results correlate well with calculated solubility parameter differences. The study provides valuable data for predicting the distribution of curatives in the different phases of dissimilar rubber blends. A mixing study was carried out by applying the solubility knowledge of curatives in rubbers to improve the properties of unreinforced 50/50 w/w blends of SBR/EPDM (SE) and NBR/EPDM (NE). Different mixing procedures are performed based on the same overall recipe for each rubber blend. Large improvements are achieved for the SE blends, not for the NE blends. The surface modification of both sulfur and CBS through plasma polymerization with acetylene, perfluorohexane, and acrylic acid are described. As a result of the plasma surface treatment, the surface energies of sulfur and CBS are decreased and brought closer to the range of the rubber polymers involved in this study. A better co-vulcanisation is achieved in the SE blends with the plasma polyacetylene micro-encapsulated sulfur and CBS, however, appreciable improvements were obtained in the NE blends with only acrylic acid. Several combinations of various plasma coated sulfur and CBS, in carbon black reinforced dissimilar rubber blends. The improvements achieved in the unreinforced rubber blends are again found by using both plasma coated sulfur and plasma coated CBS in carbon black filled blends. Interestingly, a bigger increase in properties is achieved in NE blends instead of in SE blends. The blooming behavior of plasma polyacetylene and polyperfluorohexane treated sulfur was determined in carbon black reinforced natural rubber and compared to soluble and insoluble sulfur. Advisors/Committee Members: Noordermeer, Jacobus W.M., Talma, Auke, Elastomer Technology and Engineering.

Subjects/Keywords: METIS-259719; IR-68285

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Guo, R. (2009). Improved properties of dissimilar rubber-rubber blends using plasma polymer encapsulated curatives : a novel surface modification method to improve co-vulcanization. (Doctoral Dissertation). University of Twente. Retrieved from https://research.utwente.nl/en/publications/improved-properties-of-dissimilar-rubberrubber-blends-using-plasma-polymer-encapsulated-curatives – a-novel-surface-modification-method-to-improve-covulcanization(617f1782-569e-49e6-822d-5e6091b8d61e).html ; urn:nbn:nl:ui:28-68285 ; 617f1782-569e-49e6-822d-5e6091b8d61e ; 10.3990/1.9789036529143 ; urn:isbn:978-90-365-2914-3 ; urn:nbn:nl:ui:28-68285 ; https://research.utwente.nl/en/publications/improved-properties-of-dissimilar-rubberrubber-blends-using-plasma-polymer-encapsulated-curatives – a-novel-surface-modification-method-to-improve-covulcanization(617f1782-569e-49e6-822d-5e6091b8d61e).html

Chicago Manual of Style (16th Edition):

Guo, R. “Improved properties of dissimilar rubber-rubber blends using plasma polymer encapsulated curatives : a novel surface modification method to improve co-vulcanization.” 2009. Doctoral Dissertation, University of Twente. Accessed August 13, 2020. https://research.utwente.nl/en/publications/improved-properties-of-dissimilar-rubberrubber-blends-using-plasma-polymer-encapsulated-curatives – a-novel-surface-modification-method-to-improve-covulcanization(617f1782-569e-49e6-822d-5e6091b8d61e).html ; urn:nbn:nl:ui:28-68285 ; 617f1782-569e-49e6-822d-5e6091b8d61e ; 10.3990/1.9789036529143 ; urn:isbn:978-90-365-2914-3 ; urn:nbn:nl:ui:28-68285 ; https://research.utwente.nl/en/publications/improved-properties-of-dissimilar-rubberrubber-blends-using-plasma-polymer-encapsulated-curatives – a-novel-surface-modification-method-to-improve-covulcanization(617f1782-569e-49e6-822d-5e6091b8d61e).html.

MLA Handbook (7th Edition):

Guo, R. “Improved properties of dissimilar rubber-rubber blends using plasma polymer encapsulated curatives : a novel surface modification method to improve co-vulcanization.” 2009. Web. 13 Aug 2020.

Vancouver:

Guo R. Improved properties of dissimilar rubber-rubber blends using plasma polymer encapsulated curatives : a novel surface modification method to improve co-vulcanization. [Internet] [Doctoral dissertation]. University of Twente; 2009. [cited 2020 Aug 13]. Available from: https://research.utwente.nl/en/publications/improved-properties-of-dissimilar-rubberrubber-blends-using-plasma-polymer-encapsulated-curatives – a-novel-surface-modification-method-to-improve-covulcanization(617f1782-569e-49e6-822d-5e6091b8d61e).html ; urn:nbn:nl:ui:28-68285 ; 617f1782-569e-49e6-822d-5e6091b8d61e ; 10.3990/1.9789036529143 ; urn:isbn:978-90-365-2914-3 ; urn:nbn:nl:ui:28-68285 ; https://research.utwente.nl/en/publications/improved-properties-of-dissimilar-rubberrubber-blends-using-plasma-polymer-encapsulated-curatives – a-novel-surface-modification-method-to-improve-covulcanization(617f1782-569e-49e6-822d-5e6091b8d61e).html.

Council of Science Editors:

Guo R. Improved properties of dissimilar rubber-rubber blends using plasma polymer encapsulated curatives : a novel surface modification method to improve co-vulcanization. [Doctoral Dissertation]. University of Twente; 2009. Available from: https://research.utwente.nl/en/publications/improved-properties-of-dissimilar-rubberrubber-blends-using-plasma-polymer-encapsulated-curatives – a-novel-surface-modification-method-to-improve-covulcanization(617f1782-569e-49e6-822d-5e6091b8d61e).html ; urn:nbn:nl:ui:28-68285 ; 617f1782-569e-49e6-822d-5e6091b8d61e ; 10.3990/1.9789036529143 ; urn:isbn:978-90-365-2914-3 ; urn:nbn:nl:ui:28-68285 ; https://research.utwente.nl/en/publications/improved-properties-of-dissimilar-rubberrubber-blends-using-plasma-polymer-encapsulated-curatives – a-novel-surface-modification-method-to-improve-covulcanization(617f1782-569e-49e6-822d-5e6091b8d61e).html

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