Abstract
Modified PPTAs were made by introducing ionic, propanesulfonate groups and nonionic, propyl groups. Ionic groups caused polyelectrolyte behaviour for the modified PPTA in a polar solvent and propyl groups improved solubility of the modified polymer. Modified PPTA having small amounts of side groups (less than 40 mol% in total) showed birefringence, reflecting rigidity of polymer chains. In contrast, modified PPTA having a very high percentage of side groups (nearly 100 mol%), which may be needed for solubility in common, polar, organic solvents, seems to assume more disordered structures. Ionic groups are also responsible for miscibility enhancement of the modified PPTA with a polar polymer, poly(4-vinylpyridine), due to increased interactions through ion-dipole interactions. Propyl groups may make an additional contribution to miscibility enhancement through increased flexibility of PPTA molecules.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
