Structure Formation Phenomena During Phase Inversion. II. Semiflexible Polymers and Liquid Crystallinity

• Published in: Journal of macromolecular science. Physics Vol. 39; no. 5-6; pp. 623 - 644
• Main Authors: BELTSIOS, KONSTANTINOS G., BEDARD, MARIA CELESTE MORUA
• Format: Journal Article
• Language: English
• Published: Philadelphia, PA Taylor & Francis Group 27-11-2000; Taylor & Francis
• Subjects: Applied sciences; Cellulose acetate; Exact sciences and technology; Exchange resins and membranes; Forms of application and semi-finished materials; Glass transition; Liquid crystallinity; Lyotropic gelation; Membrane structure formation; Phase inversion; Polymer industry, paints, wood; Semiflexible polymer; Technology of polymers; Structuration; Semiflexible chain; Liquid crystal polymers; Gelation; Cellulose nitrate; Membrane; Phase reversal; Cellulose ester; Cellulose acetate; Lyotropic state; Experimental study; Mechanism
• ISSN: 0022-2348; 1525-609X
• DOI: 10.1081/MB-100102475

The issue of isotropic-anisotropic equilibria contributions to structure formation of phase inversion (PI) membranes of semiflexible polymers such as cellulose derivatives is addressed. Two types of ternary phase diagrams pertinent to the PI of semiflexible polymer dopes are suggested, and modes of phase separation that control structure formation are described. Alternative interpretations for certain earlier structural observations in cellulose acetate (CA) membranes are proposed. Discussions of the lyotropic polymer gelation modes and the effect of glass formation on the progress of PI structural transformations are included.