Crosslinking behavior of polyarylene ether nitrile terminated with phthalonitrile (PEN‐t‐Ph)/1, 3, 5‐Tri‐(3, 4‐dicyanophenoxy) benzene (TPh) system and its enhanced thermal stability. Issue 2 (25th April 2013)

• Record Type: Journal Article
• Authors: Tong, Lifen; Pu, Zejun; Huang, Xu; Chen, Zhiran; Yang, Xulin; Liu, Xiaobo
• Is Part Of: Journal of applied polymer science. Volume 130:Issue 2(2013:Oct. 15)
• Page Start: 1363
• Page End: 1368
• Publication Date: 2013-04-25
• Subjects: Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.39312
• Languages: English
• ISSNs: 0021-8995

Abstract

<abstract abstract-type="main"> <title>ABSTRACT</title> <p>A novel polyarylene ether nitrile terminated with phthalonitrile (PEN‐<italic>t</italic>‐Ph) was synthesized by a simple solution polycondensation of biphenyl and hydroquinone with 2, 6‐dichlorobenzonitrile, followed by termination with 4‐nitrophthalonitrile. The PEN‐<italic>t</italic>‐Ph/1, 3, 5‐Tri‐(3, 4‐dicyanophenoxy) benzene (TPh) system was prepared by cure treatment. The phthalonitrile on PEN‐<italic>t</italic>‐Ph were thermally crosslinked with TPh in the presence of diamino diphenyl sulfone through cure treatment up to 280–340°C, which led to the transformation from thermoplastic polymers to thermosetting polymers. This is because the phthalonitrile on the PEN‐<italic>t</italic>‐Ph can react with TPh by forming phthalocyanine ring. The glass transition temperatures of the PEN‐<italic>t</italic>‐Ph/TPh system increased from 152.4°C to 194.7°C, and the initial decomposition temperature (ranging from 475.3°C to 544.0°C) increased by 68°C after thermal curing. Therefore, their thermal properties can be greatly enhanced by crosslinking. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 130: 1363‐1368, 2013</p> </abstract>