通过动态酯交换反应交联的可回收聚二甲基硅氧烷网络
Recyclable Polydimethylsiloxane Network Crosslinked by Dynamic Transesterification Reaction.
作者信息
Zhang Huan, Cai Chao, Liu Wenxing, Li Dongdong, Zhang Jiawei, Zhao Ning, Xu Jian
机构信息
Beijing National Laboratory for Molecular Sciences, CAS Research/Education Center for Excellence in Molecular Sciences, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
出版信息
Sci Rep. 2017 Sep 19;7(1):11833. doi: 10.1038/s41598-017-11485-6.
This article reports preparation of a crosslinked polydimethylsiloxane (PDMS) network via dynamic transesterification reaction between PDMS-diglycidyl ether and pripol 1017 with Zn(OAc) as the catalyst. The thermal dynamic nature of the network was investigated by the creep-recovery and stress-relaxation tests. The synthesized PDMS elastomer showed excellent solvent resistance even under high temperature, and could be reprocessed by hot pressing at 180 °C with the mechanical properties maintained after 10 cycles. Application of the PDMS elastomer in constructing micro-patterned stamps repeatedly has been demonstrated. The high plastic temperature and good solvent resistance distinguish the research from other reported thermoplastic PDMS elastomers and broaden the practical application areas.
本文报道了以醋酸锌为催化剂，通过聚二甲基硅氧烷-二缩水甘油醚与普立泊1017之间的动态酯交换反应制备交联聚二甲基硅氧烷（PDMS）网络。通过蠕变恢复和应力松弛试验研究了该网络的热动力学性质。合成的PDMS弹性体即使在高温下也表现出优异的耐溶剂性，并且可以在180℃下通过热压进行再加工，经过10次循环后仍能保持机械性能。已经证明了PDMS弹性体在反复构建微图案印章中的应用。高塑化温度和良好的耐溶剂性使该研究有别于其他报道的热塑性PDMS弹性体，并拓宽了实际应用领域。
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