Thermal, mechanical, and dielectric behaviors of crosslinked linear low density polyethylene/polyolefin elastomers blends

Ke, Qing; Huang, Xing; Wei, Ping; Wang, Gen Lin; Jiang, Ping

doi:10.1002/app.25874

Cited by 26 publications

(15 citation statements)

References 18 publications

(21 reference statements)

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“…that the crosslinking degree of LDPE could be improved by blending with EVA or POE, because EVA has more acetate groups and POE has more evenly distributed branch chains. In addition, as the crosslinking efficiency of EVA was higher than of POE, the crosslinking degree of LDPE could be further improved by blending with EVA than with POE . Meanwhile, it could be inferred that the cosslinking reaction of LDPE/EVA was finished and that LDPE/POE was still ongoing during the dynamic rheology investigation.…”

Section: Resultsmentioning

confidence: 94%

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Improving viscoelasticity and rebound resilience of crosslinked low-density polyethylene foam by blending with ethylene vinyl acetate and polyethylene-octene elastomer

Wang

Gong

Zheng

2014

J Vinyl Addit Technol

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To obtain high‐rebound resilience of crosslinking low‐density polyethylene (LDPE) foam and decrease the foam density at the same content of foaming agent, the melt viscoelasticity of LDPE with different compositions (ethylene vinyl acetate [EVA], polyethylene‐octene elastomer, and crosslinking agent) was investigated by dynamic rheology test. Then, LDPE/EVA/(polyethylene‐octene elastomer) foams with different composition ratios were produced by a continuous foaming process and investigated by the rebound resilience test. The results show that the melt viscoelasticity behavior of LDPE and its blends in the molten state possessed more melt elasticity behavior after the crosslinking was introduced. Meanwhile, the rebound resilience of LDPE foam was increased 54% at the lower foam density (0.031 g/cm3). It could meet the requirements of sports mats for high‐rebound resilience (>50%) and decrease the material cost when EVA was introduced into the foaming system. J. VINYL ADDIT. TECHNOL., 22:61–71, 2016. © 2014 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 94%

“…The average value of five determinations was used to obtain accurate results. DSC curve by dividing the measured heat of fusion by that of a 100% crystalline material (288 J/g) [9,16].…”

Section: Characterization and Measurementsmentioning

confidence: 99%

Improving viscoelasticity and rebound resilience of crosslinked low-density polyethylene foam by blending with ethylene vinyl acetate and polyethylene-octene elastomer

Wang

Gong

Zheng

2014

J Vinyl Addit Technol

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“…These radicals can react with an unsaturation of a In the case of polystyrene its rigidity, hardness and transparency were highligthed, in the case of the styrene-butadiene copolymer was its elasticity. It should be noted that these properties were not quantified, because the sums were not sufficient for developing technical tests established by the ASTM guidelines 8 .…”

Section: Resultsmentioning

confidence: 99%

Theoretical And Experimental Exploration Of Organic Synthesis Routes To Obtain Natural Rubber Analogues

Sánchez

Forero

Sánchez

et al. 2013

Proceedings of the 17th International Electronic Conference on Synthetic Organic Chemistry

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AbstracIn the present work synthesis routes and the reactions involved in the polymerization of two organic compounds similar to natural rubber were studied. To these routes and reactions, modifications related with the previously reported in the literature were performed in order to study them through theoretical tools and determine their prediction capability for the design of those analogs.The semiempirical method Austin Model 1 (AM1) was used for the study of electronic configurations and it was shown that the synthesis of the polystyrene polymer (PS) and the poly copolymer (styrene-butadiene) (SBR) is possible through the use of free radicals from styrene and 1,3-butadiene monomers using benzoyl peroxide as the catalyst in both cases; going through the intermediates 1-phenyl-2-[(phenylcarbonyl)oxy]ethyl and (2E)-4(oxy (phenylcarbonyl))2-buten-1-yl. The results show that the higher electronic densities are found over the active atom in the radical compared to the electronic densities over the ions and the interest atoms in a possible condensation. Additionally, the study of the reaction mechanisms for the designed organic synthesis routes was performed 1 by applying the frontier orbitals theory developed by R. B. Woodward, and R. Hoffmann and the respective correlation diagrams that showed thermal viability were built demonstrating the consistency between the characteristics of the orbital symmetry in the concerted reactions of the reactants and products; therefore it is seen that the free radical synthesis do not show symmetry restrictions, and it is possible to make it by a thermal route with low activation energy thresholds. The experimental yields of polymerizations were 90% and 75% for polystyrene (PS) and poly (styrene-butadiene) (SBR) respectively. Additionally mechanical tests were performed to the synthesized polymers and it was proved that the properties of the synthesized compounds are consistent with those reported in the literature. In the future it is expected to explore unknown organic synthetic routes with this research it was demonstrated that the methods are reliable.

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“…Thus, it is expected that EGMA is compatible with POE. In evaluating the POE and the polyethylene segment, Ke et al [21] used different ratios of POE to blend with LLDPE. In their paper, 10 % and 25 % POE can be fi nely dispersed at a size scale of < 0.5 µ m in the LLDPE matrix, indicating a good compatibility between polyethylene and POE due to their similar molecular chain structure.…”

Section: Compatibilization Of Pla/poe With Egmamentioning

confidence: 99%

Reactive compatibilization of poly(lactic acid)/polyethylene octene copolymer blends with ethylene-glycidyl methacrylate copolymer

Pai

Chu

Lai

2011

Journal of Polymer Engineering

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A melt blending process was used to prepare poly(lactic acid) (PLA)/metallocene catalyzed polyethylene octene copolymer (POE) blends in order to toughen PLA. A commercialized ethylene-glycidyl methacrylate copolymer (EGMA) was applied as a compatibilizer to improve the dispersion and interaction of dispersed POE to the PLA matrix. The results showed that chemical interaction seems to be the driving force for reinforcing the compatibility between PLA and POE, and also the dispersion of POE into the PLA matrix domain. With the incorporation of 10 phr EGMA in the blends, POE was welldispersed at a sub-micrometer scale within the PLA matrix, indicating better interfacial compatibility between PLA and POE. The impact strength test revealed that POE could signifi cantly toughen PLA containing EGMA in the blends, up to no-break level regarding unnotched Izod impact strength at 10 phr EGMA content. With the increase of EGMA content, the blends showed lower tensile strength, but higher elongation at break due to the elastomeric characteristics of EGMA. When 10 phr of the EGMA was incorporated into the blends, its elongation at break reached 54.5 % , 10.7 times that of neat PLA at 5.1 % . The melt viscosity of compatibilized blends containing 10 phr EGMA increased by more than 50 % in comparison with the non-compatibilized blend, which implied a good interfacial interaction between the PLA and POE interface.

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Thermal, mechanical, and dielectric behaviors of crosslinked linear low density polyethylene/polyolefin elastomers blends

Cited by 26 publications

References 18 publications

Improving viscoelasticity and rebound resilience of crosslinked low-density polyethylene foam by blending with ethylene vinyl acetate and polyethylene-octene elastomer

Improving viscoelasticity and rebound resilience of crosslinked low-density polyethylene foam by blending with ethylene vinyl acetate and polyethylene-octene elastomer

Theoretical And Experimental Exploration Of Organic Synthesis Routes To Obtain Natural Rubber Analogues

Reactive compatibilization of poly(lactic acid)/polyethylene octene copolymer blends with ethylene-glycidyl methacrylate copolymer

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