- Synthesis, characterization and properties of heat-resistant and soluble poly(aryl ether)s containing s-triazine units in the main chain
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- 论文类型： 期刊论文
- 发表时间： 2009-07-01
- 发表刊物： POLYMER DEGRADATION AND STABILITY
- 收录刊物： SCIE、EI、Scopus
- 卷号： 94
- 期号： 7
- 页面范围： 1053-1060
- ISSN号： 0141-3910
- 关键字： s-Triazine; Poly(aryl ether)s; Heat-resistant; Activation energy; Thermodynamics
- 摘要： Soluble and heat-resistant s-triazine-containing poly(aryl ether)s have been prepared for their potent utilities as high-temperature membranes and composite matrix materials. They have been synthesized by the nucleophilic displacement polymerization of 2,4-bis(4-fluorophenyl)-6-phenyl-1,3,5-triazine (BFPT) with each of resorcinol (RS), 4,4'-dihydroxydiphenyl sulfone (DS), and bisphenol-like 4-(4-hydroxylphenyl)(2H)-phthalazin-1-one (HP). The presence of meta-ether linkages, sulfone groups or phthalazinone moieties in the polymer chain results in an improvement in the solubility of s-triazinecontaining poly(aryl ether)s in common organic solvents (e.g., N,M-dimethylacetamide, N-methyl-2-pyrrolidinone). The new polymers are amorphous and exhibit excellent thermal stability. The apparent activation energy values (Ea) as determined by using Kissinger method are respectively 268.1, 245.9 and 215.1 kJ/mol under N(2) flow in dynamic heating conditions, for the first degradation stage of RS-PE, DS-PE and HP-PE, which are in well agreement with those values (272.6, 249.9 and 239.1 kJ/mol) determined by using Flynn-Wall-Ozawa method. The thermal stability classification among the polymers is made on the basis of the E, values, and it follows the decreasing order: RS-PE > DS-PE > HP-PE. The properties of these polymers have been also compared with those of corresponding poly(aryl ether)s. (C) 2009 Elsevier Ltd. All rights reserved.
