- Phase separation and theta-compositions of PPES/NMP/non-solvent systems
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- 论文类型： 期刊论文
- 发表时间： 2005-05-01
- 发表刊物： JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
- 收录刊物： Scopus、SCIE、EI、ISTIC
- 卷号： 21
- 期号： 3
- 页面范围： 430-432
- ISSN号： 1005-0302
- 关键字： polymer precipitation curve; poly (phthalazinone ether sulfone); theta-composition
- 摘要： 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.
