發(fā)布時間：2018-06-21 15:20

  本文選題：彈性粒子 + 聚二甲基硅氧烷��； 參考：《合成樹脂及塑料》2017年05期

【摘要】：采用溶液聚合法制備了以輕度交聯(lián)的聚二甲基硅氧烷(PDMS)彈性粒子為核芯、端異氰酸酯基聚乙二醇(NCO-PEG)為殼層的PDMS-聚乙二醇(PEG)核殼結(jié)構(gòu)復(fù)合粒子,并表征了其結(jié)構(gòu)。結(jié)果表明:最佳反應(yīng)時間為6 h;PDMS彈性粒子表面的硅羥基與NCO-PEG的端異氰酸酯基確實發(fā)生了化學(xué)反應(yīng),PEG被成功接枝到PDMS彈性粒子表面,PDMS-PEG中Si,O,C,N元素含量與理論值基本相符;PDMS-PEG為兩相結(jié)構(gòu),具有明顯的核殼結(jié)構(gòu),殼層厚度在130 nm左右;PDMS-PEG的初始熱分解溫度在300℃以上,可以滿足聚乳酸增韌改性研究要求。
[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，

本文編號：2049219