Super-tough Poly(lactide) Thermoplastic Vulcanizates Based on Modified Natural Rubber
Super-tough Poly(lactide) Thermoplastic Vulcanizates Based on Modified Natural Rubber
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DOI：
10.1021/acssuschemeng.6b02197
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发表时间：
2017-01-01
影响因子：
8.4
通讯作者：
Fu, Guoliang
中科院分区：
文献类型：
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作者：
Wu, Ningjing;Zhang, Hong;Fu, Guoliang
为了充分利用生物基聚乳酸（PLA）的可持续性和环境友好性，将其与天然橡胶接枝改性甲基丙烯酸缩水甘油酯（NR-GMA）通过本体自由基聚合，原位动态硫化制备了一种新型热塑性硫化橡胶（TPV）。与纯PLA相比，具有20 wt % NR-GMA的分散良好的超韧PLA基热塑性硫化胶表现出73.4kJ/m2的缺口冲击强度和136%的伸长率的显著改善，分别表示26和33倍的增加。通过傅里叶变换红外光谱（FT-IR）、动态力学分析（DMA）和差示扫描量热法（DSC）等测试手段，证实了PLA基体与NR-GMA相之间的界面反应增容作用。这种强的界面相互作用，结合精细的微米级和纳米级分散相结构，负责PLA/NR-GMA TPV的高韧性。这些新型PLA基硫化橡胶具有应用于电气设备、包装和3D打印材料的潜力。
In order to take advantage of the sustainability and environmental friendliness of a biobased poly(lactide) (PLA), it was used with natural rubber graft-modified glycidyl methacrylate (NR-GMA), via bulk free radical polymerization, to produce a new thermoplastic vulcanizate (TPV) by in situ dynamical vulcanization. The well-dispersed super-tough PLA-based thermoplastic vulcanizate with 20 wt % NR-GMA exhibited a greatly improved notched impact strength of 73.4 kJ/m(2) and elongation yield of 136%, which represented a 26 and 33-fold increase, respectively, compared to neat PLA. Interfacial reactive compatibilization between the PLA matrix and NR-GMA phase was confirmed by Fourier transform infrared spectroscopy (FT-IR) and dynamic mechanical analysis (DMA) and differential scanning (DSC) measurements. This strong interfacial interaction, in combination with a fine microscale and nanoscale dispersed phase structure, were responsible for the high toughness of PLA/NR-GMA TPV. These new PLA-based vulcanizates have the potential for application in electrical devices, packaging, and 3D printing materials.