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首页> 外文期刊>RSC Advances >Incorporating a silicon unit into a polyether backbone—an effective approach to enhance polyether solubility in CO2
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Incorporating a silicon unit into a polyether backbone—an effective approach to enhance polyether solubility in CO2

机译：将硅单元结合到聚醚主链中-一种增强聚醚在CO 2 中的溶解度的有效方法

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A series of poly(silyl ether)s were prepared by condensation polymerization and hydrosilation polymerization through incorporating a silicon unit into a polyether backbone. The phase behavior of poly(silyl ether)s in CO2 was measured in terms of concentration, molecular weight and temperature. Through incorporating the silicon unit, the poly(silyl ether)s exhibited high solubility in CO2 compared to the precursors of polyether. For example, the cloud point pressure decreased from 24.6 MPa for poly(1,2-propene glycol) (PPG) to 16.5 MPa for poly(dimethylsiloxane-alt-propene glycol) (PSPG) with a concentration of 0.6 wt% at 30 °C. Moreover, the molecular weight dependence of solubility for PSPG and PSDPG in CO2 compared with PPG was weakened. The key factor to enhance the solubility of poly(silyl ether)s in CO2 was systematically researched via surface tension and glass transition temperature. The results demonstrated that higher solubility of synthesized poly(silyl ether)s in CO2 compared to PPG was mainly attributed to lower polymer–polymer interactions.
机译：通过将硅单元结合到聚醚主链中，通过缩聚和硅氢化聚合反应制备了一系列聚甲硅烷基醚。用浓度，分子量和温度测量了聚（甲醚）在CO 2 中的相行为。与聚醚的前体相比，通过结合硅单元，聚甲硅烷基醚在CO 2 中表现出高溶解度。例如，浊点压力从聚（1,2-丙二醇）（PPG）的24.6 MPa降低到聚（二甲基硅氧烷- alt -丙二醇）（PSPG）的16.5 MPa，浓度为在30°C下为0.6 wt％。此外，与PPG相比，PSPG和PSDPG在CO 2 中的溶解度对分子量的依赖性减弱。通过表面张力和玻璃化转变温度系统研究了提高聚硅醚在CO 2 中的溶解度的关键因素。结果表明，与PPG相比，合成的聚硅烷基醚在CO 2 中的溶解度更高，这主要归因于较低的聚合物-聚合物相互作用。

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