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Modification of epoxy resins by acrylic copolymers with side‐chained mesogenic units
Author(s) -
Zhang Baolong,
Liao Shaowen,
Shi Keyu,
Du Zongjie,
Du Manquan,
Zheng Lu,
Huang Jifu
Publication year - 1999
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/(sici)1097-4628(19990829)73:9<1787::aid-app21>3.0.co;2-8
Subject(s) - copolymer , epoxy , mesogen , materials science , izod impact strength test , composite material , toughening , modulus , dynamic mechanical analysis , polymer chemistry , molar ratio , polymer , ultimate tensile strength , toughness , liquid crystalline , chemistry , organic chemistry , catalysis
A series of acrylic copolymer modifiers with mesogenic side chain (LCGMB) were synthesized and used to modify E‐51/DDM system. The dynamic mechanical behavior and impact strength of the modified systems were investigated. The results showed that the impact strength and modulus were influenced by the composition and the amounts of the modifiers. With addition of 10% (wt %) LCGMB (molar ratio of GMA : HEMA : MMA : BA = 4 : 10 : 26 : 60) based on the amount of the epoxy resin, the modified systems obtained 100% increase in impact strength, 10% increase in modulus, and a little increase in Tg . The toughening mechanism of the modified systems was also discussed. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 1787–1792, 1999