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The Influence of Chain-Ends on the Thermal and Rheological Properties of Some 40/60 PES/PEES Copolymers

被引：30
作者：
Abate, Lorenzo [1 ]
Blanco, Ignazio [1 ]
Cicala, Gianluca [1 ]
Recca, Giuseppe [1 ]
Scamporrino, Andrea [1 ]
机构：
[1] Univ Catania, Dipartimento Metodol Fis & Chim Ingn, I-95125 Catania, Italy
来源：
POLYMER ENGINEERING AND SCIENCE | 2009年 / 49卷 / 08期
关键词：
PYROLYSIS MASS-SPECTROMETRY; ACTIVATION-ENERGY VALUES; POLYETHERSULFONE/POLYETHERETHERSULFONE COPOLYMERS; ISOTHERMAL DEGRADATION; ETHER SULFONE)S; POLYMERS; KINETICS; STABILITY; BLENDS; POLY(ETHER-SULFONE);
D O I：
10.1002/pen.21378
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Four random, differently ended (-Cl, -NH(2), -OH, and -COO(-)), polyethersulfone/polyetherethersulfone (PES/PEES) copolymers were studied to investigate the influence of chain ends on thermal and rheological behaviors. The number average molar mass (M(n) approximate to 9500 g.mol(-1)) and the PES/PEES ratio (40/60) of all copolymers investigated were checked by (1)H NMR spectra. Thermal degradations were carried out in the scanning mode and initial decomposition temperatures (T(i)) and activation energy values of degradation (E(a)) were obtained. Glass transition temperature (T(a)) was determined by differential scanning calorimetry and complex viscosity (eta*) by rheological measurements in isothermal heating conditions (T = 270 degrees C). All parameters determined were largely affected by copolymer chain ends and decreased according to the same order, -OH > -NH(2) > -Cl > -COO(-). The results were discussed and interpreted. POLYM. ENG. SCI., 49:14771483, 2009. (C) 2009 Society of Plastics Engineers
引用
收藏
页码：1477 / 1483
页数：7
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