Premium
Synthesis and properties of novel aromatic copolyamides containing chloro‐substituted phthalazinone moiety in the main chain
Author(s) -
Liu Pengtao,
Liu Cheng,
Jian Xigao
Publication year - 2007
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.24577
Subject(s) - condensation polymer , moiety , glass transition , polymer chemistry , polymer , polyamide , acetamide , materials science , terephthalic acid , amorphous solid , ultimate tensile strength , ether , polyester , chemistry , organic chemistry , composite material
A series of novel copolyamides were synthesized by the direct polycondensation of 1,2‐dihydro‐2‐(4‐carboxyphenyl)‐4‐[3‐chloro‐4‐(4‐carboxyphenoxyl)phenyl]‐phthalazinone ( 1 ), terephthalic acid (TPA) with three commercial diamines. The inherent viscosities of the polyamides were between 0.82 and 1.86 dL/g. When the molar ratios of 1 and TPA were higher than 1 : 1, the polymers were soluble in some polar aprotic solvents such as N ‐methyl‐pyrrolidone and N , N ‐dimethyl acetamide etc. These polymers were amorphous with 10% weight loss temperatures in N 2 above 490°C and their glass transition temperatures were above 269°C. Some films of the polymers were pale yellow and transparent with tensile strengths up to 147.8 MPa, initial modulus up to 2.56 GPa and elongations at break values up to 9.8%, which depended on the repeating unit structures. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007