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Polymers and Polymer Composites

SYNTHESIS AND PROPERTIES OF POLYETHERIMIDES BY NUCLEOPHILIC DISPLACEMENT REACTION

September 1, 2012 By: Rajasekar S; Venkatesan D Research article

Title: SYNTHESIS AND PROPERTIES OF POLYETHERIMIDES BY NUCLEOPHILIC DISPLACEMENT REACTION
Page Range: p.845-852
Author(s): Rajasekar S; Venkatesan D
File size: 323K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 20
Issue No: No.9

Abstract
A series of polyetherimides was prepared by nucleophilic displacement reaction of bisnitrophthalimides containing ether and sulphur linkages with aromatic diols in dimethyl sulphoxide. The two new bisnitrophthalimides, 4,4′-bis(Nphenoxy4-nitrophthaliimide)-2,2′-diphenylisopropylidene and 4,4′-bis(N-phenoxy-4-nitrophthalimide)diphenylsulphide were prepared from the corresponding diamines and 4-nitrophthalic anhydride. The nitro displacement polymerisation yielded high molecular weight polyetherimides with inherent viscosities of 0.460.54 dL/g. The polyetherimides were soluble in dipolar aprotic solvents such as DMSO, DMF and NMP. These polymers had glass transition temperatures around 200 degrees C. Thermogravimetric analysis indicated that the 10% weight loss temperature for these polymers ranged from 430 to 490 degrees C with a high char yield at 800 degrees C. 18 Refs.

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