有机小分子杂化聚降冰片烯形状记忆性能的研究

Shape Memory Performance of Organic Small Molecule Hybrid PNB

以聚降冰片烯(PNB)为研究对象,研究增塑剂(塑分T和环保芳烃油)和有机小分子(微晶蜡、淀粉和碱木质素)对PNB形状记忆性能的影响。结果表明:添加环保芳烃油的PNB玻璃化温度在室温(20℃)附近,塑分T对PNB的玻璃化温度影响不大,有利于PNB在室温下的形变固定;在玻璃化温度起始温度下拉伸时,几种填充PNB均出现屈服现象,且呈现硬而韧的应力-应变特征;几种填充PNB均具有优良的传统形状记忆性能,形状固定率在98%以上,形状恢复率在70%以上,其可逆塑性形状记忆性能低于传统形状记忆性能,可逆塑性形状固定率为49%~77%;微晶蜡杂化PNB具有优异的形状记忆性能。

Polynorbornene(PNB)was used to study the effects of plasticizers[plastic T and treaded distillate aromatic extract(TDAE)]and organic small molecules(microcrystalline wax,starch and alkali lignin)on the shape memory performance of PNB.The results showed that the glass transition temperature of PNB with TDAE was around room temperature(20℃),the plastic T had little effect on the glass transition temperature of PNB,which was beneficial to the deformation fixation of PNB at room temperature.When stretched at the initial temperature of glass transition temperature,all of the filled PNB showed yield behavior and exhibited hard and tough stress-strain characteristics.All of the filled PNB had excellent traditional shape memory performance,the shape fixation rate was more than 98%and the shape recovery rate was more than 70%.The reversible plastic shape memory performance of PNB was lower than traditional shape memory performance level,and the reversible plastic shape fixation rate was 49%~77%.The microcrystalline wax hybrid PNB had excellent shape memory performance.