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Citation: Li Binghai, Zhang Shuping, Liu Xinye. STUDY ON THE SYNTHESIS OF POLYIMIDE VIA NUCLEOPHILIC DISPLACEMENT POLYCONDENSATION OF BISCHLOROPHTHALIMIDE WITH DIANION OF BISPHENOL[J]. Chinese Journal of Applied Chemistry, ;1986, 3(4): 1-5. shu

STUDY ON THE SYNTHESIS OF POLYIMIDE VIA NUCLEOPHILIC DISPLACEMENT POLYCONDENSATION OF BISCHLOROPHTHALIMIDE WITH DIANION OF BISPHENOL

1.
Changchun Institute of Applied Chemistry, Academia Sinica

Received Date: 29 May 1985
Available Online: 5 November 1985

In this work polyimide was synthesized via nucleophilic displacement polycondensation of dischlorophthalimide diphenyl ether with dianion of bisphenol. The dianion was generated by the conventional method with aqueous sodium hydroxide. Study was made on the influence of the change of variables as well as the structure of the monomer on the polycondensation. The results indicate that the ease of the reaction generally depends on the electron density of the phenoxide and the ability of the positive charge of the reactive site to invite the nucleophile as well as the solubility of the polymer thus obtained.It appears difficult to get a high molecular weight product from bisphenol A although the phenoxide ion of bisphenol A has the strong nucleophilicity and the polymer obtained therefrom has the good solubility. With the consideration that the phenoxide with the strong nucleophilicity would at the same time have the strong ability to form hydrogen bonding with the trace water in the system. High molecular weight polymer with η_i=0.55dl/g(DMAC, 30℃) was obtained from the polycondensation of bisphenol A and bis(4-chlorophthalimide) diphenyl ether via multi-stage removal of water from the system.The copolycondensation of several monomers was conducted.The thermal stability of the homo-or copolymers have been studied preliminarily.
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