The results indicate that the epoxy resin is a chain extender having highest activity and preeminent chain extending effect, though it induces crosslinking to a given extent and br...

• 以环氧树脂为扩链剂反应活性最高,扩链效果比较明显,但有一定的交联反应发生,导致挤出物熔体破裂;二异氰酸酯在扩链时,由于其在高温下自身会发生化学反应,使扩链效率降低;