PDMS-PEG核壳结构复合粒子的制备

发布时间：2018-06-21 15:20

  本文选题：弹性粒子 + 聚二甲基硅氧烷　； 参考：《合成树脂及塑料》2017年05期

【摘要】：采用溶液聚合法制备了以轻度交联的聚二甲基硅氧烷(PDMS)弹性粒子为核芯、端异氰酸酯基聚乙二醇(NCO-PEG)为壳层的PDMS-聚乙二醇(PEG)核壳结构复合粒子,并表征了其结构。结果表明:最佳反应时间为6 h;PDMS弹性粒子表面的硅羟基与NCO-PEG的端异氰酸酯基确实发生了化学反应,PEG被成功接枝到PDMS弹性粒子表面,PDMS-PEG中Si,O,C,N元素含量与理论值基本相符;PDMS-PEG为两相结构,具有明显的核壳结构,壳层厚度在130 nm左右;PDMS-PEG的初始热分解温度在300℃以上,可以满足聚乳酸增韧改性研究要求。
[Abstract]:PDMS-polyethylene glycol (PEG) core-shell composite particles with slightly crosslinked polydimethylsiloxane (PDMS) elastic particles as core and isocyanate terminated poly (ethylene glycol) (NCO-PEG) as shell layer were prepared by solution polymerization and their structures were characterized. The results show that the optimum reaction time is 6 h when the hydroxyl group on the surface of PDMS elastic particle and the end isocyanate group of NCO-PEG do take place in the PDMS elastic particle surface. The chemical reaction of PEG was successfully grafted onto the PDMS-PEG surface of PDMS elastic particle surface. The PDMS-PEG is a two-phase structure. The initial thermal decomposition temperature of PDMS-PEG is above 300 鈩，

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