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Dynamic vulcanization of recycled milk pouches (LDPE-LLDPE) and EPDM blends using dicumyl peroxide

机译:使用过氧化二枯基对再生奶袋(LDPE-LLDPE)和EPDM混合物进行动态硫化

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摘要

The viability of thermomechanical recycling of post-consumer milk pouches (blend of low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE)) and its scope for suitable engineering applications were investigated.The effects of blending with ethylene-propylene-diene monomer (EPDM) rubber and subsequent curing using dicumyl peroxide (DCP) on the macromolecular structure and properties of recycled polyethylene (PE) blends were studied.The crosslinking efficiency of recycled PE/EPDM blends and possible thermooxidative degradation of recycled polymer upon peroxide curing was assessed using torque and gel content measurements along with infrared spectroscopic analysis.Both the torque and gel content of the blends varied with DCP crosslinking reactions and also were affected by oxidative degradation.In view of the electrical application area of this recycled blend material,the dielectric breakdown strength and volume resistivity were measured.The mechanical performance and thermal stability of recycled PE/EPDM blends improved with progressive crosslinking by DCP but deteriorated somewhat at higher DCP dose.Scanning electron microscopy showed good interface bonding between recycled polymer and dispersed EPDM phase in the cured blends compared to the non-cured blends.
机译:研究了消费后牛奶袋(低密度聚乙烯(LDPE)和线性低密度聚乙烯(LLDPE)的混合物)的热机械循环利用的可行性及其适用的工程应用范围。与乙烯-丙烯-共混物的共混效果研究了二烯单体(EPDM)橡胶和随后使用过氧化二枯基(DCP)固化的再生聚乙烯(PE)共混物的大分子结构和性能。再生PE / EPDM共混物的交联效率以及过氧化物固化后再生聚合物可能的热氧化降解使用扭矩和凝胶含量测量以及红外光谱分析来评估共混物的扭矩和凝胶含量随DCP交联反应而变化,并且还受氧化降解的影响。鉴于这种回收的共混材料的电气应用领域,测量介电击穿强度和体积电阻率。力学性能和回收的PE / EPDM共混物的热稳定性随DCP逐步交联而改善,但在较高的DCP剂量下有所恶化。扫描电子显微镜显示,与未固化共混物相比,固化共混物中再生聚合物与分散的EPDM相之间具有良好的界面结合。

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