The effect of silicon and phosphorus on the degradation of poly(methyl methacrylate)

被引:26
作者
Chang, TC
Chen, YC
Ho, SY
Chiu, YS
机构
[1] NATL TSING HUA UNIV,DEPT CHEM,HSINCHU 30043,TAIWAN
[2] CHUNG SHAN INST SCI & TECHNOL,CHEM SYST RES DIV,LUNGTAN 32526,TAIWAN
关键词
phosphorylated; poly(methyl methacrylate); degradation;
D O I
10.1016/0032-3861(96)89392-X
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Thermal decomposition of the polydimethylsiloxane-(azobiscyano-pentanoyl ester)s (PDMS-ACP) in the presence of methyl methacrylate (MMA) monomer yielded poly(dimethylsiloxane)-poly(methyl methacrylate) block copolymers (PDMS-b-PMMA). Phosphorus functionalized poly(methyl methacrylate) (DEVP-PMMA) was prepared by copolymerization of MMA with diethyl vinyl phosphonate (DEVP) with PDMS-ACP initiator. The thermal stability and apparent activation energy for thermal degradation of these copolymers were studied by thermogravimetry and compared with unmodified poly(methyl methacrylate) (PMMA). The incorporation of PDMS segments in block polymer improved thermal stability of PMMA, whereas phosphorylated PMMA displayed a lower thermal stability. The activation energies for the degradation process in PMMA and PDMS-b-PMMA, calculated by the Ozawa method, increased approximately with increase in conversion. The values of activation energy of phosphorylated PMMA were smaller than that of PMMA and decreased with increasing phosphorus content. Copyright (C) Elsevier Science Ltd.
引用
收藏
页码:2963 / 2968
页数:6
相关论文
共 40 条
[1]   FIRE-RETARDANT POLYMERS - POLYMERIZATION OF 1-OXO-2,6,7-TRIOXA-1-PHOSPHABCYCLO[2,2,2]OCT-4-YLMETHYL METHACRYLATE, AND ITS COPOLYMERIZATION WITH METHYL-METHACRYLATE, STYRENE, AND TRIALLYLCYANURATE [J].
ALLEN, DW ;
ANDERTON, EC ;
BRADLEY, C ;
SHIEL, LE .
POLYMER DEGRADATION AND STABILITY, 1995, 47 (01) :67-72
[2]   THE FLAME-RETARDANT EFFECT OF DIETHYL VINYL PHOSPHONATE IN COPOLYMERS WITH STYRENE, METHYL-METHACRYLATE, ACRYLONITRILE AND ACRYLAMIDE [J].
BANKS, M ;
EBDON, JR ;
JOHNSON, M .
POLYMER, 1994, 35 (16) :3470-3473
[3]   STUDIES OF CYCLIC AND LINEAR POLY(DIMETHYL SILOXANES) .6. EFFECT OF HEAT [J].
BANNISTER, DJ ;
SEMLYEN, JA .
POLYMER, 1981, 22 (03) :377-381
[4]  
BROCKHAUS A, 1956, MAKROMOLEKUL CHEM, V18-9, P262
[5]   INHIBITION BY RED PHOSPHORUS OF UNIMOLECULAR THERMAL CHAIN-SCISSION IN POLY(METHYL METHACRYLATE) - INVESTIGATION BY NMR, FT-IR AND LASER DESORPTION FOURIER-TRANSFORM MASS-SPECTROSCOPY [J].
BROWN, CE ;
WILKIE, CA ;
SMUKALLA, J ;
CODY, RB ;
KINSINGER, JA .
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1986, 24 (06) :1297-1311
[6]   INFLUENCE OF FIRE RETARDANT, AMMONIUM POLYPHOSPHATE, ON THERMAL-DEGRADATION OF POLY(METHYL METHACRYLATE) [J].
CAMINO, G ;
GRASSIE, N ;
MCNEILL, IC .
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1978, 16 (01) :95-106
[7]   THERMAL-DEGRADATION OF POLY(METHYL METHACRYLATE) IN THE PRESENCE OF TIN-(IV) CHLORIDE AND TETRAPHENYLTIN [J].
CHANDRASIRI, JA ;
WILKIE, CA .
POLYMER DEGRADATION AND STABILITY, 1994, 45 (01) :91-96
[8]   DEGRADATION OF PHOSPHORUS-CONTAINING POLYURETHANES [J].
CHANG, TC ;
CHIU, YS ;
CHEN, HB ;
HO, SY .
POLYMER DEGRADATION AND STABILITY, 1995, 47 (03) :375-381
[9]   THERMOOXIDATIVE DEGRADATION OF PHOSPHORUS-CONTAINING POLYURETHANE [J].
CHANG, TC ;
SHEN, WS ;
CHIU, YS ;
HO, SY .
POLYMER DEGRADATION AND STABILITY, 1995, 49 (03) :353-360
[10]  
CHANG TC, 1994, J POLYM RES, V1, P353