期刊
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
卷 53, 期 24, 页码 2867-2877出版社
WILEY-BLACKWELL
DOI: 10.1002/pola.27764
关键词
halogenated; polyamide; refractive index; structure-property relations; sulfide and sulfoxide
资金
- Malaysian Ministry of Higher Education
- Universiti Teknologi Malaysia [01K23]
- Universiti Teknologi Malaysia under LRGS [4L817]
High-refractive-index polyamides (PAs) are developed by incorporation of sulfide- or sulfoxide linkages and chlorine substituents. The PAs are synthesized through the polycondensation of two novel diamine monomers, 2,2-sulfide-bis(4-chloro-1-(4-aminophenoxy) phenyl ether (3a) and 2,2-sulfoxide-bis(4-chloro-1-(4-aminophenoxy) phenyl ether (3b), with various aromatic diacids (a-e). The ortho-sulfide or sulfoxide units, pendant chlorine groups, and flexible ether linkages in the diamine monomers endowed the obtained PAs with excellent solubilities in organic solvents. The resulting PAs showed high thermal stability, with 10% weight loss temperatures exceeding 415 degrees C under nitrogen and 399 degrees C in air atmosphere. The combination of chlorine substituents, sulfide or sulfoxide linkages, and ortho-catenated structures provided polymers with high transparency along with high refractive index values of up to 1.7401 at 632.8nm and low birefringences (<0.0075). The structure-property relationships of the analogous PAs containing sulfide or sulfoxide linkages were also studied in detail by comparing the results. (c) 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2015, 53, 2867-2877
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