摘要
通过在聚碳酸酯(PC)中加入不同抗氧剂以提高其热稳定性,研究了抗氧剂的种类、用量、环境条件对PC热稳定性能和降解动力学的影响。结果发现,加入复配抗氧剂能显著提高PC的热稳定性能。在有氧气情况下,抗氧剂的质量分数增至0.6%时,起始降解温度(以降解率达到5%时的温度计)从原来的472.1℃增加至500.4℃,而最大降解温度(降解速率最大温度)也从原来的530.3℃增加至546.4℃,并应用改良Coats-Redfern法对PC降解动力学做了分析。
To upgrade the thermostability of polycarbonate （PC） , various varieties of antioxidants were added to PC. The effects of the variety and content of the antioxidants and that of environment conditions on the thermostability and degradative kinetics of PC were also investigated. The results showed the thermostability of PC could be upgraded obviously by the addition of composite antioxidants. In the condition of oxygen, the initial degradation temperature （the temperature of 5% degradation degree） rose from 472. 1 ℃ to 500. 4 ℃ as the mass fraction of the antioxidant increased to 0. 6% , while the top degradation temperature （ the temperature of fastest degradation rate） rose from 530.3 ℃ to 546. 4 ℃. The kinetics of PC degradation was analyzed by means of modified Coats-Redfem method.
出处
《塑料工业》
CAS
CSCD
北大核心
2009年第1期49-52,共4页
China Plastics Industry
关键词
聚碳酸酯
抗氧剂
热稳定性
降解动力学
Polyearbonate
Antioxidant
Thermostability
Degradative Kinetics
