摘要
研究了不同1,4-环己烷二甲醇(CHDM)含量的PETG树脂在氮气和空气两种气氛中的热分解稳定性。结果表明:在氮气中,PETG树脂只有一个热失重台阶,相应的热分解温度分别为Tdi383.1～412.4℃,Tdp425.7～427.8℃,Tdi448.4～459.7℃,总失重84.7%～92.1%,这个结果可以作为PETG热分解稳定性的表征;CHDM含量对PETG树脂的热分解稳定性有一定影响,随着CHDM含量增加,PETG树脂的热分解稳定性有所降低。在空气气氛中,PETG树脂存在两个热失重台阶,第二失重台阶是残留物进一步氧化燃烧过程的体现。所以,第一失重台阶的热分解参数,可以作为PETG热氧化分解稳定性的表征。PETG的热氧化分解稳定性较其热分解稳定性要差,但两者相差不大。
The heat decomposition stability of PETG resins with different CHDM contents was studied in nitrogen and air respectively. The results showed that PETG resins exhibited a heat weight-loss process in nitrogen, which might correspond to the thermal degradation and heat decomposition of PETG chains. The heat decomposition behavior of PETG in air was quite different from that in nitrogen, which exhibited twothermo weight-loss processes in air. The first heat decomposition process was produced by the thermal degradation and heat decomposition of polymer chains as that in nitrogen. And the second heat decomposition process was mainly caused by the heat oxidative decomposition of the products formed during the first heat decomposition process. The first decomposition process in nitrogen and in air could be taken as the characterizations of the heat decomposition and heat oxidative decomposition stabilities of PETG, respectively.
出处
《合成纤维》
CAS
北大核心
2005年第6期1-5,共5页
Synthetic Fiber in China
