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Synthesis and properties of thermoplastic and dissolvable polysiloxanes containing polyhedral oligomeric silsesquioxane
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2020-10-17 , DOI: 10.1002/pol.20199265 Ruilu Guo 1, 2 , Yuemin Liu 2 , Lixia Zhou 2 , Na Li 2 , Guangxin Chen 1, 2 , Zheng Zhou 1, 2 , Qifang Li 2, 3
Journal of Polymer Science ( IF 3.9 ) Pub Date : 2020-10-17 , DOI: 10.1002/pol.20199265 Ruilu Guo 1, 2 , Yuemin Liu 2 , Lixia Zhou 2 , Na Li 2 , Guangxin Chen 1, 2 , Zheng Zhou 1, 2 , Qifang Li 2, 3
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There are many benefits associated with thermoplastic silicones, but very few examples exist: silicone resins or rubbers are normally thermosets. In this article, a facile and efficient approach was reported to prepare thermoplastic silicone by introducing a bulky side siloxane group. Monofunctional polyhedral oligomeric silsesquioxane (POSS), as the bulky siloxane group, was grafted onto the linear polysiloxane backbone via thiol–ene click reaction, endowing the liquid polysiloxane with thermoplastic nature. The POSS‐grafted polysiloxane could be remolded by a hot‐melting or solution casting process. It was worth noting that the novel thermoplastic silicone was composed of both linear siloxane main chains and siloxane side groups, which was distinctly different from previous researches on thermoplastic silicones consisted of siloxane main chains and organic side groups. Thermal analysis, rheological characterization and molecular dynamics simulation results revealed the thermoplastic properties of POSS‐grafted polysiloxane depended on the bulky POSS's hindrance to the movement of the polymer backbone rather than the interaction between the organic side groups.
中文翻译：
含多面体低聚倍半硅氧烷的热塑性和可溶性聚硅氧烷的合成与性能
热塑性有机硅有许多好处，但很少有例子：有机硅树脂或橡胶通常是热固性的。在本文中，报道了一种通过引入庞大的侧基硅氧烷基团来制备热塑性有机硅的简便有效的方法。单官能多面体低聚倍半硅氧烷（POSS），作为庞大的硅氧烷基团，通过硫醇-烯点击反应接枝到线性聚硅氧烷主链上，赋予液态聚硅氧烷以热塑性。POSS接枝的聚硅氧烷可通过热熔或溶液浇铸工艺进行重塑。值得注意的是，新型热塑性有机硅是由线性硅氧烷主链和硅氧烷侧基组成的，这与以前对热塑性有机硅的研究明显不同，后者由硅氧烷主链和有机侧基组成。热分析，流变学表征和分子动力学模拟结果表明，POSS接枝的聚硅氧烷的热塑性特性取决于庞大的POSS对聚合物主链运动的阻碍，而不是有机侧基之间的相互作用。
更新日期：2020-11-17
中文翻译：
含多面体低聚倍半硅氧烷的热塑性和可溶性聚硅氧烷的合成与性能
热塑性有机硅有许多好处，但很少有例子：有机硅树脂或橡胶通常是热固性的。在本文中，报道了一种通过引入庞大的侧基硅氧烷基团来制备热塑性有机硅的简便有效的方法。单官能多面体低聚倍半硅氧烷（POSS），作为庞大的硅氧烷基团，通过硫醇-烯点击反应接枝到线性聚硅氧烷主链上，赋予液态聚硅氧烷以热塑性。POSS接枝的聚硅氧烷可通过热熔或溶液浇铸工艺进行重塑。值得注意的是，新型热塑性有机硅是由线性硅氧烷主链和硅氧烷侧基组成的，这与以前对热塑性有机硅的研究明显不同，后者由硅氧烷主链和有机侧基组成。热分析，流变学表征和分子动力学模拟结果表明，POSS接枝的聚硅氧烷的热塑性特性取决于庞大的POSS对聚合物主链运动的阻碍，而不是有机侧基之间的相互作用。
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