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Structure and thermal degradation of poly( N ‐phenyl acrylamide) and poly( N ‐phenyl methacrylamide)
Author(s) -
Li XinGui,
Huang MeiRong,
Zhu ZhiLiang,
Jin Yi,
Wang XueSong
Publication year - 2003
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.11824
Subject(s) - methacrylamide , thermogravimetric analysis , polymer chemistry , azobisisobutyronitrile , thermal decomposition , molar mass distribution , polymerization , polymer , materials science , acrylamide , monomer , char , chemistry , pyrolysis , organic chemistry
Poly( N ‐phenyl acrylamide) (PPA) and poly( N ‐phenyl methacrylamide) (PPMA) were prepared by using N ‐phenyl acrylamide and N ‐phenyl methacrylamide as monomer, respectively, in tetrahydrofuran using azobisisobutyronitrile as initiator. FT‐IR, 1 H‐NMR, and GPC were used to characterize their molecular structure. The PPA obtained exhibited higher molecular weight and wider molecular weight distribution than that of PPMA. Their thermal degradation and kinetics were systematically investigated in two atmospheres of nitrogen and air from room temperature to 800°C by thermogravimetric analysis at 10°C/min. Based on the thermal decomposition reactions in nitrogen and air, it is shown that a three‐step degradation process in nitrogen and a four‐step degradation process for two polymers were observed in this investigation. The initial thermal degradation temperature was lower than 190°C. Under two atmospheres, PPA exhibits higher degradation temperature, higher temperature at the maximum weight‐loss rate, faster maximum weight‐loss rates, and larger weight loss for the first‐stage decomposition, as well as higher char yield at 500°C than those of PPMA. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 1065–1071, 2003