Modification of an  o ‐cresol formaldehyde epoxy resin by the thermotropic liquid crystalline polymer | Zendy

Huang Zeng Fang | Zendy; Tan Song Ting | Zendy; Wang Xia Yu | Zendy

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Modification of an o ‐cresol formaldehyde epoxy resin by the thermotropic liquid crystalline polymer

Author(s) -

Huang Zeng Fang,

Tan Song Ting,

Wang Xia Yu

Publication year - 2005

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.21885

Subject(s) - thermotropic crystal , epoxy , materials science , curing (chemistry) , condensation polymer , polymer , glass transition , polymer chemistry , formaldehyde , copolymer , cresol , composite material , phenol , chemical engineering , chemistry , organic chemistry , liquid crystalline , engineering

Two novel liquid crystalline polymers, polydiethyleneglycol bis(4‐hydroxybenzoate) terephthaloyl and block copolymer (PDBH), were synthesized by condensation reaction. The blends of the two liquid crystalline polymers and o ‐cresol formaldehyde epoxy resin were prepared by linear phenol‐formaldehyde resin as curing reagent. Both mechanical and thermal properties of the blends containing liquid crystalline polymer were improved to a certain extent. By adding 5 wt % PDBH, the impact strength, bending strength, and the glass transition temperature were enhanced by 128%, 23.84%, and 28°C, respectively, compared with the unmodified version. The results of curing kinetics showed that the curing reaction active energy of the modified system by PDBH decreased from 79.70 to 70.26 kJ/mol. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1626–1631, 2005

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