Influence of radiation temperature on the crosslinking of nitrile rubber by electron beam irradiation

Vijayabaskar, V.; Stephan, M.; Kalaivani, S.; Volke, Sebastian; Heinrich, Gert; Dorschner, H.; Bhowmick, Anil K.; Wagenknecht, Udo

doi:10.1016/j.radphyschem.2007.09.011

Cited by 28 publications

(8 citation statements)

References 16 publications

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“…This chemical locking of polymer chains is the origin of all of the benefits of EBinduced crosslinking, including the improvement of the thermal, mechanical, and chemical properties. Many systems such as rubbers [11,12], organic/inorganic composites [12,13], copolymers [13], and hydrogels [14,15] have been reported to be crosslinked effectively by the EB irradiation.…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical and electrical properties of PDMS/MWCNT composite films crosslinked by electron beam irradiation

2015

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Electron beam (EB)-crosslinked flexible polydimethylsiloxane (PDMS) composite films containing 1.0-3.0 wt% pristine MWCNT were manufactured, and their structures, thermomechanical, and electrical properties were systematically investigated for applications as electric heating materials. The crosslinking extent of PDMS/MWCNT composite films was found to increase with the EB irradiation dose of 200-600 kGy, irrespective of the MWCNT content. Raman spectra showed that I D /I G values (0.97-1.02) for the EB-crosslinked composite films were lower than those of pristine and EB-irradiated MWCNTs (1.07-1.17), demonstrating the possibility of the chemical interaction between MWCNT and PDMS in the composite films. Dynamic mechanical thermal data revealed that the EB-crosslinked composite films possessed flexible features in a wide range of temperatures, although the storage moduli increased slightly with the increment of the MWCNT content. The electrical resistivity and electric heating behavior of the composite films, which were thermally stable up to *200°C, were strongly dependent on the MWCNT content as well as applied voltage. For instance, the composite film with 2.0 wt% MWCNT achieved a steady-state maximum temperature of *150°C at a relatively low voltage of 35 V and it also maintained stable and reproducible electric heating performance under stepwise cyclic voltage changes for a long period of time.

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Section: Introductionmentioning

confidence: 99%

Thermomechanical and electrical properties of PDMS/MWCNT composite films crosslinked by electron beam irradiation

2015

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“…TMPTA molecule has three active C=C bonds. The grafting or crosslinking of polymer chains by TMPTA will occur during the melt-blending process at high temperatures [31]. When the content of TMPTA is low, a little amount of copolymer composed of PET and ST2000 chains connected by TMPTA will be produced during the melt blending process, and can act as the compatibilizer to enhance the interfacial interaction between PET and ST2000, resulting in the increase of the toughness of the PET/ST2000 blend.…”

Section: A Effect Of γ-Ray Radiation On the Mechanical Properties Ofmentioning

confidence: 99%

In-situ Enhanced Toughening of Poly(ethylene terephthalate)/elastomer Blends via Gamma-Ray Radiation at Presence of Trimethylolpropane Triacrylate

Xie

Chen

Wang

et al. 2016

Chinese Journal of Chemical Physics

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Gamma-ray radiation has always been a convenient and effective way to modify the interfacial properties in polymer blends. In this work, a small amount of trimethylolpropane triacrylate (TMPTA) was incorporated into poly(ethylene terephthalate) (PET)/random terpolymer elastomer (ST2000) blends by melt-blending. The existence of TMPTA would induce the crosslinking of PET and ST2000 molecular chains at high temperatures of blending, resulting in the improvement in the impact strength but the loss in the tensile strength. When the PET/ST2000 blends were irradiated by gamma-ray radiation, the integrated mechanical properties could be enhanced significantly at a high absorbed dose. The irradiated sample at a dose of 100 kGy even couldn't be broken under the impact test load, and at the same time, has nearly no loss of tensile strength. Based on the analysis of the impactfractured surface morphologies of the blends, it can be concluded that gamma-ray radiation at high absorbed dose can further in situ enhance the interfacial adhesion by promoting the crosslinking reactions of TMPTA and polymer chains. As a result, the toughness and strength of PET/ST2000 blend could be dramatically improved. This work provides a facial and practical way to the fabrication of polymer blends with high toughness and strength.

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“…The enhanced filler/matrix interaction resulted in a reduction of the molecular chains mobility in the interfacial region hence causing an increase interfacial stiffness which consequently improved the storage modulus of zeolite/EVA composites. Furthermore, Vijayabaskar et al [8] mentioned that crosslinking hindered the segmental motion of polymeric chains and this required a higher temperature for the inception of rotation thus increasing the value of storage modulus. This means that the higher value of storage modulus for crosslinked composites is related to the formations of bonds between polymer chains through a crosslinking process [9].…”

Section: Dynamic Mechanical Analysismentioning

confidence: 99%

Effect of peroxide cross-linking on viscoelastic behaviour and thermal properties of zeolite filled ethylene vinyl acetate composite

Zaharri¹,

Othman²

2015

Composites

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In this research, both crosslinked and uncrosslinked zeolite/ethylene vinyl acetate (EVA) composites were prepared by a melt-mixing process followed by compression molding using a hot press machine according to standard test specimen. For the crosslinking process, dicumyl peroxide (DCP) was used as a crosslink agent in the composites. Dynamic mechanical analysis (DMA) was performed in order to study the viscoelastic properties of the composites and the results indicated that the transition temperatures of crosslinked composites were greater than those of uncrosslinked composites. The values of storage modulus and loss modulus were improved while that of loss tangent was reduced with the presence of DCP in the composites. Earlier, the addition of higher content of zeolite particles had increased the magnitude of elastic modulus and loss modulus of both uncrosslinked and crosslinked composites. However, the intensity of loss tangent peaks decreased. Furthermore, the study of thermal properties of the composites was carried out using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The results from TGA and DSC showed that the zeolite loading as well as the presence of DCP, had an influence on the thermal stability and crystallinity of EVA/zeolite composites.

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Influence of radiation temperature on the crosslinking of nitrile rubber by electron beam irradiation

Cited by 28 publications

References 16 publications

Thermomechanical and electrical properties of PDMS/MWCNT composite films crosslinked by electron beam irradiation

Thermomechanical and electrical properties of PDMS/MWCNT composite films crosslinked by electron beam irradiation

In-situ Enhanced Toughening of Poly(ethylene terephthalate)/elastomer Blends via Gamma-Ray Radiation at Presence of Trimethylolpropane Triacrylate

Effect of peroxide cross-linking on viscoelastic behaviour and thermal properties of zeolite filled ethylene vinyl acetate composite

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