【摘要】 用激光Raman光谱研究了三种不同晶型的2,4-已二炔-1,6二醇的双苯异氰酸酯(HDPU)的聚合,发现不同晶型的HDPU的聚合活性与其C=C伸缩振动频率的频移之间存在内在联系。这说明单体晶格与聚合物晶格的匹配是HDPU具有高的聚合活性的必要条件。更多还原

【Abstract】 The solid-state polymerization of three ctystalline form of 2,4 hexadiynylene ofbis (phenyl urethane) was studied by laser Raman spectroscopy. It is found that thefrequency shift of C≡C stretching vibtation is correlated with the polymerizationreactivity of different crystalline form of HDPU, therefore the low reactivity of form Ⅲ,obtained by crystallization in ethanol can be attributed to the dismatching ofmonomeric and polymeric lattices.更多还原