摘要
以马来酸二辛基锡(DOTM)为热稳定剂,对聚偏氯乙烯(PVDC)热稳定体系进行研究,采用刚果红法和热失重分析测试了DOTM用量对PVDC热分解脱氯化氢变色温度、变色时间以及热失重的影响。结果表明:纯PVDC受热后易分解,含3质量份DOTM的PVDC,其刚果红试纸起始变色温度和完全变色温度与纯PVDC相比分别提高了16℃和19℃,试纸起始变色时间和完全变色时间分别延长了563s和1 308s,恒温热重损失率降低了35.2百分点,等速升温热失重初始分解温度和最大速率峰对应温度分别提高了54℃和63℃,热分解温度和耐热稳定性大幅度提高。
Taking dioctyltin maleate （DOTM） as heat stabilizer, the thermal stability system of polyvinylidcnc chloride （PVDC） was studied. The influences of DOTM content on color change temperature, color change time and thermal weight loss caused by thermal dchydrochlorination of PVDC wcrc invcstigatcd by congo rcd method and thcrmogravimctry （TGA）. The results show that the pure PVDC decomposes casily after being heated. Comparcd with the pure PVDC, the PVDC with 3 phr DOTM exhibits increase in hcat dccomposition tcmpcraturc and heat stability： thc initial and complctc color change temperature of congo rcd test papcr incrcascs by 16 ℃ and 19 ℃, the initial and complete color changc time extends by 563 s and 1 308 s,the isothermal weight loss decreases by 35.2% ,the dccomposition tcmpcraturc at bcginning of weight loss and the tcmpcraturc at maximum decomposition rate inercasc by 54 ℃ and 63℃ whcn raising tcmpcraturc at constant rate.
出处
《聚氯乙烯》
CAS
2011年第11期32-35,共4页
Polyvinyl Chloride
基金
福建省科技厅项目(2009H0017)~~
