马来酸酐接枝改性GTR对聚乳酸性能的影响OA北大核心CSTPCD
Effect of maleic anhydride graft-modified ground tire rubber on properties of poly(lactic acid)
以过氧化二苯甲酰(BPO)为引发剂,将马来酸酐(MAH)接枝到废旧轮胎橡胶粉(GTR)表面得到了GTR-g-MAH(MGTR),采用熔融共混法制备了聚乳酸(PLA)/MGTR共混物,并对其微观形貌、结晶行为及力学性能进行了系统分析.结果表明,成功地将MAH接枝到GTR上;MGTR粒子能均匀地分散在PLA基体中,两相间具有良好的相容性;MGTR能促进PLA的结晶并形成更加完善的晶体.当MGTR含量为10%时,样品具有最高的结晶度16.4%,是纯PLA的7倍;PLA/MGTR的拉伸强度随着MGTR含量的增加逐渐减小,而断裂伸长率和冲击强度呈现出先增加后减小的趋势.当MGTR含量为15%时,样品表现出最大的断裂伸长率和冲击强度,分别比纯PLA提高了30%和60%,对PLA起到了良好的增韧效果,并能保持较好的拉伸强度.
Maleic anhydride(MAH)was grafted onto the surface of waste rubber powder(GTR)to obtain GTR-g-MAH(MGTR)using benzoyl peroxide as an initiator.Poly(lactic acid)(PLA)/MGTR blends were prepared through melt blending,and their micromorphology,crystallization behavior,and mechanical properties were thoroughly investigated.As a result of successful grafting of MAH onto GTR,the MGTR particles were uniformly distributed in the PLA matrix due to good phase compatibility.Additionally,MGTR could facilitate the crystallization of PLA and the formation of more perfect crystals.The tensile strength of the PLA/MGTR blends decreased with an increase in the MGTR content,while their elongation at break and impact strength exhibited an increasing trend at first and then a decrease.The blends containing 10 wt%MGTR exhibited the highest crystallinity of 16.4%,which is 7 times that of pure PLA.With 15 wt%MGTR was incorporated,the blends showed the highest elongation at break and impact strength,which were 30%and 60%greater than those of pure PLA,respectively.This allowed the blends to maintain good tensile strength and also resulted in effective toughening for PLA.
胡永祥;谢纪岭;李伟铭;张璐;汤香港;吕亿同;申红望;鞠冠男
山东理工大学材料科学与工程学院,山东 淄博 255100山东方特管业有限公司,山东 泰安 271412东营市赫邦化工有限公司,山东 东营 257237
化学工程
聚乳酸废旧橡胶粉马来酸酐接枝相容性力学性能
poly(lactic acid)ground tire rubbergrafted maleic anhydridecompatibilitymechanical property
《中国塑料》 2024 (007)
20-24 / 5
山东省科技型中小企业创新提升工程(2022TSGC1166、2023TSGC0589);山东省自然科学基金(ZR2023ME233)
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