热致液晶性序列嵌段共聚酯的多重热转变  

Multiple Thermal Transitions of Thermotropic Sequential Block Copolyester

作　　者：朱诚身[1] 莫志深[2] 李自法[1] 王尚儿 李丽霞[2] 张子勇[1] 

机构地区：[1]郑州大学化学系,450052 [2]中国科学院长春应用化学研究所,130022

出　　处：《功能高分子学报》1991年第4期290-294,共5页Journal of Functional Polymers

摘　　要：本文利用DSC研究了热致液晶性序列嵌段共聚酯在不同升温速率时的多重熔融转变,和不同冷却速率对结晶与熔融过程的影响。发现T_(kn)和T_(ni)与热历史、升温速率及成形条件均无关,T_(kn)=425.86K,T_(nt)=480.60K;而T_(in)与T_(nk)随冷却速率增大而降低。The multiple thermal transitions of a thermotropic sequential block copolyester, which was synthesized by polycondensation of 1,10-decanediol (80 in weight), poly(oxytetramethylene) glycol (M.W. = 1050,20 in weight) and 2-methyl-p-phenylene di (4-chloroformyl) benzoate, have been studied by DSC. The transitional temperatures of the crystal (K) to nematic liquid crystal (N), T_(kn), and N to isotropic liquid (I), T_(ni), are independent on the thermal history and the forming condition, T_(kn)= 425.86K, T_(ni)=480.60K. But the temperatures of I to N and N to K are reduced with the raising of cooling rate.

关 键 词：热致液晶 序列嵌段 共聚酯 热转变 

分 类 号：O753.2[理学—晶体学]