Toughening of polylactide with natural rubber grafted with poly(butyl acrylate)
Toughening of polylactide with natural rubber grafted with poly(butyl acrylate)
复制标题
聚丙烯酸丁酯接枝天然橡胶对聚丙交酯的增韧
DOI：
10.1002/pi.3118
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发表时间：
2011-10
影响因子：
3.2
通讯作者：
中科院分区：
文献类型：
--
作者：
采用乳液聚合法将丙烯酸丁酯接枝到天然橡胶（NR）上，制备了天然橡胶接枝聚丙烯酸丁酯（NR-g-PBA）增韧聚乳酸（PLA）。通过傅立叶变换红外光谱和核磁共振光谱对纯化的NR-g-PBA进行了确认。采用Haake型密炼机制备了NR g PBA/PLA和NR/PLA共混物。共混物的形态和力学性能作为橡胶含量的函数进行了研究。扫描电镜观察表明，在NR/PLA共混物中未发现存在于NR/PLA共混物中的球形粒子分散相，表明PBA接枝NR与PLA相容，对PLA起到了有效的增韧作用。随着NR接枝PBA含量的增加，共混物的断裂伸长率和冲击强度显著提高。PLA与NR共混后热稳定性降低，但与NR-g-PBA共混后热稳定性保持不变。版权所有© 2011化学工业协会
Natural rubber grafted with poly(butyl acrylate) (NR-g-PBA) in an attempt to toughen polylactide (PLA) was prepared by grafting butyl acrylate onto natural rubber (NR) through emulsion polymerization. The purified NR-g-PBA was confirmed by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. NR-g-PBA/PLA blend and NR/PLA blend were prepared with a Haake internal melt mixer. The morphology and mechanical properties of the blends were investigated as a function of rubber content. Observations by scanning electron microscopy showed that the spherical-particle-dispersed phase appearing in the NR/PLA blend was not found in the NR-g-PBA/PLA blend, which showed that NR grafted with PBA is compatible with PLA, and accounted for the efficient toughening effect on PLA. The elongation at break and the impact strength were significantly improved with an increase in NR-g-PBA content. The thermal stability of PLA decreased when blended with NR but was retained with NR-g-PBA. Copyright © 2011 Society of Chemical Industry
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