新型聚苯并噻嗪树脂的合成、固化及性能研究

聚苯并噁嗪树脂是一类具有广阔应用前景的热固性树脂，引起了人们广泛的研究兴趣，本项目计划进行与苯并噁嗪树脂结构类似的苯并噻嗪树脂的合成、固化及性能的探索研究，利用硫酚类化合物通过Mannich反应合成三种[1,3]-苯并噻嗪单体，经开环聚合制备聚苯并噻嗪树脂。具体研究内容如下：首先，我们将制备单官能苯并噻嗪及苯并噁嗪模型单体研究比较二者的合成及开环聚合机理；其次，合成双官能苯并噻嗪单聚体及类似结构的苯并噁嗪单体研究比较其结构与性能之间的关系；第三，合成含烯丙基的苯并噻嗪单体，探索利用苯并噻嗪开环聚合及thiol-ene反应双重固化构筑高性能聚苯并噻嗪树脂。本项目将为开发新型苯并噻嗪树脂和进一步认识和拓展聚苯并噁嗪树脂奠定基础。

Polybenzoxazine is a promising thermosetting resin which has undergone rapid development recently. The focus of this project is to study the synthesis, curing and properties of polybenzothiazine, which has a structure similar to the polybenzoxazine. Three [1,3]-benzothiazine monomers will be synthesized by Mannich reactions of thiophenols and subsequently undergo ring-opening polymerization to get polybenzothiazines. Firstly, Mono-functional benzothiazine monomer and similar benzoxazine monomer will be prepared as model compounds to study and compare their synthesize and mechanism of ring-opening polymerization. Secondly, bi-functional benzothiazine and benzoxazine monomers with similar structure will be synthesized to compare and elucidate the relationship between their structure and properties. Furthermore, benzothiazine monomer containing allyl group will be synthesized to explore using the dual cure, which are ring-opening polymerization of benzothiazine and thiol-ene reaction, to prepare high performance polybenzothiazines. This project will lay foundations for the development of novel polybenzothiazine materials, as well as further understanding and developing the polybenzoxazines.