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Thermal, mechanical, and thermo‐mechanical properties of thermosets produced using low M w functionalized polyolefins and polyamines
Author(s) -
Hameed Tayyab,
Potter David K.,
Takacs Elizabeth
Publication year - 2011
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.35518
Subject(s) - thermosetting polymer , crystallinity , materials science , polyethylene , maleic anhydride , ultimate tensile strength , composite material , polymer chemistry , molar mass , chemical engineering , copolymer , polymer , engineering
Thermosets obtained by reacting highly functionalized maleic anhydride‐grafted polyethylene and a polyetherdiamine at several NH 2 /MA molar ratios were characterized for their gel content, thermal, mechanical, and thermo‐mechanical behavior. Gel content varied with composition and a maximum (57%) observed when NH 2 /MA molar ratio was 1.5. Two melting transitions were observed for thermosets, representing the semicrystalline polyethylene fraction in the gel and sol part of the material in contrast to a single transition for the starting polyethylene. Overall crosslinking suppressed the crystallinity of the polyethylene in the thermoset. A single T g observed in the DMA analysis suggested phase mixing between the polyethylene and polyether chains. A shift in the T g observed was related to the degree of crosslinking in the thermosets. Tensile properties of the thermosets were observed to be a strong function of composition and the degree of crosslinking and the optimum mechanical performance was shown by thermosets when NH 2 /MA molar ratio was 1.5 and 2.0. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012