Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2007-06-05

Journal: JOURNAL OF APPLIED POLYMER SCIENCE

Included Journals: Scopus、EI、SCIE

Volume: 104

Issue: 5

Page Number: 2807-2811

ISSN: 0021-8995

Key Words: polyamides; phthalazinone; solubility; mechanical properties; thermal properties

Abstract: 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 I 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 degrees C and their glass transition temperatures were above 269 degrees 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. (c) 2007 Wiley Periodicals, Inc.