Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2005-05-01

Journal: JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY

Included Journals: ISTIC、EI、SCIE、Scopus

Volume: 21

Issue: 3

Page Number: 430-432

ISSN: 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.