聚(1,3-己二酸丙二醇酯)功能化羟基多壁碳纳米管的非等温结晶

摘要

A series of poly (1,3-propylene glycol-hexanedioic acid) grafted hydroxyl multi-wall carbon nanotubes (PHHCNT) are prepared by in situ polymerization using hydroxyl carbon nanotubes (HCNTs),1,3-propylene glycol and hexanedioic acid as reactants.Unique crystallizing and melting behaviors of PHHCNT were examined by using differential scanning calorimetry (DSC).The non-isothermal crystallization behaviors and kinetics of PHHCNT significantly depend on the feed content of HCNTs and cooling rate.To a certain extent,the crystallization peak temperatures (Tc) of PHHCNT tend to shift to a higher temperature region with increasing feed content of HCNTs,HCNTs accelerate the formation of heterogeneous nuclei and crystal growth.A small quantity of HCNTs is more effective in enhancing the crystallizing rate and enthalpy of PHHCNT.Jeziorny equation is deviate from the truth in describing the non-isothermal crystallization of PHHCNT while Avrami-Ozawa equation is more effective.%以羟基多壁碳纳米管、1,3-丙二醇、己二酸为原料,采用原位聚合法合成聚(1,3-己二酸丙二醇酯)功能化羟基多壁碳纳米管.采用差热扫描量热法测定产物的结晶和熔融行为.羟基多壁碳纳米管的添加量和冷却速率对聚(1,3-己二酸丙二醇酯)功能化羟基多壁碳纳米管的非等温结晶行为有一定的影响.在一定范围内,随着羟基多壁碳纳米管含量的增加,产物结晶温度增加.冷却速率增加,产物的结晶温度降低.羟基多壁碳纳米管起到异相成核的作用并促进结晶生长.少量羟基多壁碳纳米管对促进聚合产物结晶更加有效.Jeziorny方法描述聚合产物的非等温结晶行为出现偏离,Avrami-Ozawa方法可以更有效地描述其非等温结晶行为.