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首页> 外文期刊>RSC Advances >Enhancing the electro-mechanical properties of polydimethylsiloxane elastomers through blending with poly(dimethylsiloxane-co-methylphenylsiloxane) copolymers
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Enhancing the electro-mechanical properties of polydimethylsiloxane elastomers through blending with poly(dimethylsiloxane-co-methylphenylsiloxane) copolymers

机译：通过与聚（二甲基硅氧烷-共-甲基苯基硅氧烷）共聚物共混来增强聚二甲基硅氧烷弹性体的机电性能

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摘要

In this work, improved electro-mechanical properties of silicone-based dielectric elastomers are achieved by means of adding so-called “voltage-stabilisers” prepared from phenyl-functional copolymers prepared using oxyanionic ring-opening polymerisation of octamethylcyclotetrasiloxane (D4) and either tetramethyltetraphenylcyclotetrasiloxane (T4) or octaphenylcyclotetrasiloxane (O4). The concentration of the voltage stabiliser was varied both by changing the molar ratio between methyl and phenyl groups in the copolymer and also by varying the amount of copolymer mixed into a PDMS-based elastomer. The phenyl-functional copolymers were generally found to disperse homogeneously in the PDMS matrix and this resulted in networks with improved mechanical and electrical properties. The developed elastomers were inherently extensible with enhanced tensile and tear strengths, due to phenyl-rich microphases acting as reinforcing domains. Furthermore, addition of phenyl-functional copolymers resulted in elastomers with increased relative permittivity and electrical breakdown strength compared to control elastomers while retaining a low dielectric loss. This demonstrates their efficiency as voltage stabilisers.
机译：在这项工作中，通过添加所谓的“电压稳定剂”来改善有机硅基介电弹性体的机电性能，该稳定剂由使用八甲基环四硅氧烷（D4）和四甲基四苯基环四硅氧烷的氧阴离子开环聚合反应制得的苯基官能共聚物制得。 （T4）或八苯基环四硅氧烷（O4）。通过改变共聚物中甲基和苯基之间的摩尔比以及通过改变混合到基于PDMS的弹性体中的共聚物的量，来改变电压稳定剂的浓度。通常发现，苯基官能的共聚物均匀地分散在PDMS基质中，这导致了具有改善的机械和电气性能的网络。由于富含苯基的微相充当了增强区域，因此开发出的弹性体具有固有的可扩展性，具有增强的拉伸强度和撕裂强度。此外，与对照弹性体相比，苯基官能共聚物的添加导致弹性体具有相对介电常数和电击穿强度的增加，同时保持低介电损耗。这证明了它们作为稳压器的效率。

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