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Synthesis and Thermal Behavior of Polyamide 12,T Random and Block Copolymers
Author(s) -
Novitsky Theodore F.,
Mathias Lon J.,
Osborn Scott,
Ayotte Roger,
Manning Steven
Publication year - 2012
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201250310
Subject(s) - copolymer , terephthalic acid , polymer chemistry , materials science , polymerization , salt (chemistry) , caprolactam , solubility , condensation polymer , stoichiometry , polymer , chemistry , organic chemistry , polyester , composite material
PA‐12,T was synthesized by melt condensation of 1,12‐diaminododecane (DA) and terephthalic acid salt and by solution polymerization of biscaprolactam terephthalamide (BCT) and DA in molten caprolactam. Stoichiometry of both methods were varied from 10 mol‐% excess terephthalic acid (or BCT) and 10 mol‐% excess DA and the impact on intrinsic viscosity, end group concentration and end group functionality was examined. PA‐12,T salt was then copolymerized with PA‐6,T salt and melting behavior was determined to examine the effect of random comonomers. Block copolymers were synthesized by anionic polymerization of PA‐6 with PA‐12,T macro‐coinitiators formed from the solution step‐growth reaction. The melting and solubility properties of the block copolymers were then correlated with the PA‐12,T block size and compared to randomly formed copolymers.