常用抗氧剂对PMMA树脂热氧化稳定性的影响_魏长吉.pdf

24 　 10 　　　 Vol.24, No.10 2010 10 CHINA PLASTICS Oct., 2010 　　　 PMMA 1 2 1 1 1, 2 ＊ 魏长吉 , 曹春雷 , 张子健 , 杨海东, 张会轩 (1., 130012; 2., 130022) 　:(PMMA )。, PMMA 。, ( 3 ‰), PMMA 。BHT DLTDP , 1/2。, , 。 　　:;; :T Q325.7 　　　:B　　:1001-9278(2010)10-0081-04 Effect of Current Antioxidants on Thermal Oxidation Stability of PMMA 1 2 1 WEI Cha gji , CAO Chu lei , ZHANG Zijia , 1 1, 2 ＊ YANG Haido g , ZHANG Huixua (1.E gi eeri g Research Ce ter of Sy thetic Resi a d Special Fiber, Mi istry of Educatio , Cha gchu U iversity of Tech ology, Cha gchu 130012, Chi a; 2.Cha gchu I stitute of Applied Chemistry, Chi ese Academy of Scie ces, Cha gchu 130022, Chi a) Abstract:The effect of a tioxida t o thermal oxidatio stability of polymethyl methacrylate (PM MA )w as systematically studied by thermogravimetric a alysis.It w as i dicated that the additio of a tioxida ts could effectively improve thermal oxidatio stability of PM MA .The i itial decompositio temperature a d maximum decompositio rate temperature i creased li early w ith a tioxida t loadi g (up to 3 ‰).The mai a tioxida t BHT w as effective for the i itial decompositio temperature a d the assista t a tioxida t DLTDP was effective for the maximum decompositio rate temperature.The optimal w eight ratio of the mai a d assista t a tioxida ts w as 1/2. Key ords:polymethyl methacrylate;a tioxida t;thermal stability , , 200 ℃ 0