Abstract
利用呋喃环侧基与单烯化合物所发生的Diels-Alder(DA)环加成反应,大幅度降低呋喃环在共聚物中的含量,从而制备出空气氛下稳定性较好的二氧化碳共聚物.研究发现DA反应的环加成程度越高,呋喃甲基缩水甘油醚/二氧化碳共聚物(PFGEC)的空气稳定性越好,当环加成程度超过70%时,可以得到稳定产物.DA反应条件对环加成程度影响较大,以N-苯基马来酰亚胺为例,最高环加成程度可达84.1%.此外,还发现DA反应在一定的温度下存在一定的可逆性,环加成产物在100℃左右可快速发生解离,即发生r-DA反应.
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