Hits:

Indexed by:期刊论文

Date of Publication:2005-05-01

Journal:JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY

Included Journals:Scopus、SCIE、EI、ISTIC

Volume:21

Issue:3

Page Number:430-432

ISSN No.:1005-0302

Key Words:polymer precipitation curve; poly (phthalazinone ether sulfone); theta-composition

Abstract:Poly (phthalazinone ether sulfone) (PPES) with 1:1 and 1:3 ratios of bisphenol A (BPA) unit to phthalazinone unit were selected as samples. Polymer precipitation curves for the ternary systems PPES (1:1)/NMP/ non-solvent and PPES (1:3)/NMP/non-solvent were determined by a titration method. Comparison between two sets of data is made. Non-solvents used were H2O, ethyl ether (EE), diethylene glycol (DEGC), ethyleneglycol methylether (EGME) and butanone (130). NMP/non-solvent theta-com positions for PPES (1:1) and PPES (1:3) were also estimated. It was found that the volume ratio of non-solvent to NMP at the property mutation or worsening of PPES membrane is close to the theta-com position.