异山梨醇改性PTT共聚酯的合成及其非等温结晶动力学研究  

Synthesis and non-isothermal crystallization kinetics of PTT copolyester modified with isosorbide

作　　者：翟桂法 陈延明[1] 王立岩[1] 蒋森 郭又晟 ZHAI Guifa;CHEN Yanming;WANG Liyan;JIANG Sen;GUO Yousheng(College of Petrochemical Engineering,Shenyang University of Technoloy,Liaoyang 111003)

机构地区：[1]沈阳工业大学石油化工学院,辽宁辽阳111003

出　　处：《合成纤维工业》2022年第1期25-30,共6页China Synthetic Fiber Industry

摘　　要：以异山梨醇(IS)作为第三单体,对苯二甲酸和1,3-丙二醇为基本原料,在5 L缩聚釜中制得聚对苯二甲酸1,3-丙二醇酯(PTT)及不同IS含量的对苯二甲酸1,3-丙二醇-异山梨醇共聚酯(PTTI);使用核磁共振氢谱仪分析PTT及PTTI的结构,使用差式扫描量热仪测定PTT和PTTI在不同降温速率下的降温曲线,并采用Jeziorny法研究PTT及PTTI的非等温结晶动力学。结果表明:在PTTI试样的核磁共振氢谱中,化学位移为4.296~5.706处出现了IS上8个氢原子所形成的特征峰,表示IS成功参与了PTT的反应;随着降温速率的增加,PTT及PTTI的结晶温度降低,结晶曲线变宽,结晶能力变差;在相同降温速率下,相比PTT,加入IS后的PTTI的非等温结晶动力学速率常数变大,结晶温度降低;IS的加入不利于PTT结晶。Poly(1,3-propylene terephthalate)(PTT)and 1,3-propylene glycol terephthalate-isosorbide copolyester(PTTI)with different isosorbide(IS)content were prepared in a 5 L polycondensation kettle with IS as the third monomer and terephthalic acid and 1,3-propanediol as basic raw materials.The structures of PTT and PTTI were analyzed by nuclear magnetic resonance hydrogen spectroscopy,the cooling curves of PTT and PTTI were measured at different cooling rates by differential scanning calorimetry,and the non-isothermal crystallization kinetics of PTT and PTTI were studied by Jeziorny method.The results showed that the characteristic peak formed by 8 hydrogen atoms on IS appeared at the chemical shift of 4.296-5.706 in the nuclear magnetic resonance hydrogen spectrum of PTTI sample,indicating that IS had successfully participated in the PTT reaction;the crystallization temperature of PTT and PTTI decreased,the crystallization curve became wide and the crystallization ability became poor with the increase of cooling rate;compared with PTT,PTTI had the higher non-isothermal crystallization kinetic rate constant and the lower crystallization temperature at the same cooling rate;and the addition of IS was not conducive to PTT crystallization.

关 键 词：聚对苯二甲酸1 3-丙二醇酯 异山梨醇 共聚酯 合成 非等温结晶动力学 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]