PPO及其改性物在低于玻璃化转变退火时的热行为研究
Thermal Behavior of PPO and Its Derivertives Below the Glass Transition Temperatures
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摘要: 用DSC法研究了聚苯醚(PPO)、羧化度为16.0mol%的羧化PPO(C-PPO)和相应的C-PPO的正十二酯(Et-CPPO)在稍低于玻璃化转变温度等温退火的热焓松弛行为,讨论改性基团对热焓松弛速率的影响。发现三种样品在等温退火过程中产生的吸热峰随退火时间或温度的增加而增加。在相同退火条件下,峰宽随侧基链加长而增加,热焓松弛速率降低。Abstract: DSC was used to study the process of the enthalpy relaxation below T_g of poly(2, 6-dimethyl-1, 4-phenylene oxide) (PPO), carboxylated PPO(C-PPO) and laurate of PPO(Ee-PPO). The effect of modified groups on the enthalpy relaxtion and on the mechanism of m
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