Preparation of polypropylene (PP)/ethylene octene copolymer (EOC) thermoplastic vulcanizates (TPVs) by high energy electron reactive processing

Rajeshbabu, R.; Gohs, Uwe; Naskar, Kinsuk; Thakur, Varun; Wagenknecht, Udo; Heinrich, Gert

doi:10.1016/j.radphyschem.2011.07.001

Cited by 42 publications

(26 citation statements)

References 20 publications

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“…According to the Figure 1, the complex viscosity decreased as the frequency increased, which clearly shows the pseudoplastic behavior of the blends, assuming the Cox Merz rule [46][47][48][49][50][51] . No significant differences were observed between the blends in relation to the exposure time of GTR to microwaves, and also whether or not [35] containing clay.…”

Section: Oscillatory Rheometrymentioning

confidence: 79%

Blends of ground tire rubber devulcanized by microwaves/HDPE - Part B: influence of clay addition

et al. 2015

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SbstractThe main objective of this work is to study the influence of clay addition on dynamically revulcanized blends of Ground Tire Rubber (GTR)/High Density Polyethylene (HDPE). GTR was previously devulcanized in a system comprised of a conventional microwave oven adapted with a motorized stirring, with a fixed microwave power and at various exposure times. The influence of clay addition on the final properties of the blends was evaluated in terms of mechanical, viscoelastic, thermal and rheological properties, with morphology being also analyzed. The results depict that the clay can modify the rheological behavior of the GTR phase, in addition to the thermal and mechanical properties of some blends.

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Section: Oscillatory Rheometrymentioning

confidence: 79%

Blends of ground tire rubber devulcanized by microwaves/HDPE - Part B: influence of clay addition

et al. 2015

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“…Figure 2, the complex viscosity decreased with the increase of the frequency, which clearly shows the pseudoplastic behavior of the blends, assuming the Cox Merz rule [30][31][32][33][34][35] . η* of the dynamically revulcanized blends are higher than the blend 80GTR0/20HDPE due the increase of the cross-linking density of the GTR phase [35] .…”

Section: Oscillatory Rheometrymentioning

confidence: 79%

Blends of ground tire rubber devulcanized by microwaves/HDPE - Part A: influence of devulcanization process

et al. 2015

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SbstractThe main objective of this work is the study of the influence of microwaves devulcanization of the elastomeric phase on dynamically revulcanized blends based on Ground Tire Rubber (GTR)/High Density Polyethylene (HDPE). The devulcanization of the GTR was performed in a system comprised of a conventional microwave oven adapted with a motorized stirring at a constant microwaves power and at various exposure times. The influence of the devulcanization process on the final properties of the blends was evaluated in terms of mechanical, viscoelastic, thermal and rheological properties. The morphology was also studied.

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“…Recently Giri et al [22] developed a new system in this family which is based on LLDPE/ PDMS blend system. But all the TPVs have limited use in automotive applications due to their low heat resistance and poor oil resistance properties associated with the olefinic thermoplastic matrices [23].…”

Section: G Heinrichmentioning

confidence: 99%

Novel thermoplastic vulcanizates (TPVs) based on silicone rubber and polyamide exploring peroxide cross-linking

Chatterjee¹,

Wießner²,

Naskar³

et al. 2014

Express Polym. Lett.

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Abstract. Novel thermoplastic vulcanizates (TPVs) based on silicone rubber (PDMS) and polyamide (PA12) have been prepared by dynamic vulcanization process. The effect of dynamic vulcanization and influence of various types of peroxides as cross-linking agents were studied in detail. All the TPVs were prepared at a ratio of 50/50 wt% of silicone rubber and polyamide. Three structurally different peroxides, namely dicumyl peroxide (DCP), 3,3,5,7,7-pentamethyl 1,2,4-trioxepane (PMTO) and cumyl hydroperoxide (CHP) were taken for investigation. Though DCP was the best option for curing the silicone rubber, at high temperature it suffers from scorch safety. An inhibitor 2,2,6,6-tetramethylpiperidinyloxyl (TEMPO) was added with DCP to stabilize the radicals in order to increase the scorch time. Though CHP (hydroperoxide) had higher half life time than DCP at higher temperature, it has no significant effect on cross-linking of silicone rubber. PMTO showed prolonged scorch safety and better cross-linking efficiency rather than the other two. TPVs of DCP and PMTO were made up to 11 minutes of mixing. Increased values of tensile strength and elongation at break of PMTO cross-linked TPV indicate the superiority of PMTO. Scanning electron micrographs correlate with mechanical properties of the TPVs. High storage modulus (E!) and lower loss tangent value of the PMTO cross-linked TPV indicate the higher degree of cross-linking which is also well supported by the overall cross-link density value. Thus PMTO was found to be the superior peroxide for cross-linking of silicone rubber at high temperature.

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Preparation of polypropylene (PP)/ethylene octene copolymer (EOC) thermoplastic vulcanizates (TPVs) by high energy electron reactive processing

Cited by 42 publications

References 20 publications

Blends of ground tire rubber devulcanized by microwaves/HDPE - Part B: influence of clay addition

Blends of ground tire rubber devulcanized by microwaves/HDPE - Part B: influence of clay addition

Blends of ground tire rubber devulcanized by microwaves/HDPE - Part A: influence of devulcanization process

Novel thermoplastic vulcanizates (TPVs) based on silicone rubber and polyamide exploring peroxide cross-linking

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