含硫磷系阻燃剂的分子结构设计及其在聚酯树脂中阻燃和抗熔滴机理研究

It is a frontier and very hot topic in the study on flame retardant (FR) treated poly(ethylene terephthalate) (PET) with high efficency carbonificated and atntidriped agentia. The phosphorus and sulfur synergic system modified PET demonstrated higher flame retardancy efficiency, carbonification and antidripping. The action condition, effect laws and mechanism of action of synergic system in FR-PET will be studied in this application. The influence of various phosphorus-sulfur phenanthrene and difference processing method on the FR-PET will be investigated. The flame retardancy, thermal property and mechanical property will be studied. The group, element composition, surface morphology，generation and develop of char layer in residue，and gas composite and structure in gaseous phase varied with temperature will be researched, respectively. The flame retardant, antidripping mechanisms and degradation process of FR-PET incorporated phosphorus-sulfur synergistic system will be discussed. Through this study, the mechanisms of phosphorus sulfur synergism will be got and theoretical ground can be provided. It is helpful to design and synthesize novel more efficient phosphorus sulfur FR.

高效成炭，抗熔融滴落阻燃是聚酯阻燃研究的热点，也是该技术的前沿，而磷硫复合阻燃聚酯树脂具有高阻燃效率、高成炭抗熔滴协同阻燃抗熔滴行为特征，本申请主要研究磷硫协同阻燃剂在聚酯树脂中磷、硫元素产生协同作用的条件、规律和机理。研究不同结构的磷硫杂菲、不同的改性方式对聚酯性能的影响；研究阻燃聚酯阻燃性能、热性能和机械性能的变化规律；研究阻燃聚酯随温度作用残留物的基团变化、元素组成、表面形态和炭层产生衍变过程；研究阻燃聚酯随温度变化释放的气体成份及结构；研究不同结构阻燃剂通过不同方式引入聚酯后材料的降解路线和阻燃抗熔滴机理。通过本研究，探索磷硫协同阻燃剂对聚酯体系的阻燃抗熔滴机理，为今后进一步设计合成更高效的磷硫协同阻燃抗熔滴材料提供理论支持。

阻燃剂的构效关系研究是提高阻燃剂性能的关键所在。利用磷元素的高效阻燃特性，以磷杂菲结构单元为基础，引入新的阻燃元素到相应的阻燃剂中，构成了一系列衍生结构。从结构单元着手，对不同添加型和反应型阻燃剂展开了系统的研究并应用到环氧树脂和聚对苯二甲酸乙二醇酯改性体系中，取得了一系列的创新性成果。对磷杂菲结构进行优化，获得了不同特性的阻燃剂，为新型阻燃体系的开发提供了新的思路。