新型耐高温透明环烯烃共聚物的合成与性能

利用一种大位阻的降冰片烯衍生物{外型-1,4,4a,9,9a,10-六氢-9,10(1',2')-桥苯亚基-1,4-桥亚甲基蒽(EHBMA)}与丙烯(PP)共聚,制备一种新型的耐高温透明环烯烃共聚物材料(COC)。拉伸实验、DSC和UV-Vis光谱分析结果表明:该材料的玻璃化转变温度达到220℃,透光率达到92%;改变共聚物中的EHBMA与PP共聚单体的比例,可以实现玻璃化转变温度在170~220℃范围内可调;与目前耐温性能最好的商品化COC产品TOPAS6017相比,该材料的玻璃化温度(T_g)提高了将近40℃;同时,该COC材料兼具良好的力学性能。

Synthesis and Properties of Novel High TemperatureTransparent Cyclic Olefin Copolymers

Novel high temperature and transparent cyclic olefin copolymers (COC) derived from bulky cyclic olefin {exo-1,4,4a,9,9a,10-hexahydro-9,10(10,20)-benzeno-l,4-methanoanthracene (EHBMA)} were successfully synthesized by the copolymerization of EHBMA and propylene(PP).The glass transition temperature (Tg) of the resulted COC can be controlled easily by adjusting the feed ratio of the EHBMA and PP.The Tg can be adjusted from 170 to 220 ℃.The DSC and UV-Vis spectra results show that the Tg and transmittance are up to 220 ℃ and 92% respectively.The synthesized COC has a Tg about 40 ℃ higher than that of commercial TOPAS 6017 product.The tensile test showes that the COC material has good mechanical properties.The synthesized COC has high thermal stabilities, good mechanical properties and excellent transparencies, and it will be used in the aerospace, medical and other high-tech fields.