Abstract
The solubility limits of solutions of poly (p-phenylene benzobisthiazole) (PBZT), poly(ether-ether-ketone), and two nylons (du Pont, Zytel®42 and Zytel®330) in methane sulphonic acid (MSA) were determined by turbidimetric titration with water. The solubilities rank as follows: Zytel®42 > Zytel®330 > PEEK > PBZT. The coagulation of solutions of these polymers was examined in two limiting case: very slow (exposure to water vapour) and very fast (immersion in a water bath) coagulation rates. The slow coagulation of ternary solutions shows that PBZT may either precipitate first from the composite solutions or coprecipitate with the thermoplastic depending on their relative solubility. The immersion coagulation process can be described by a simple diffusion model and the diffusion coefficient of water in the polymer solution is determined to be on the order of 10−5 cm2s−1. Our results suggest that PBZT will coagulate first from ternary solutions of PBZT, nylon, and MSA during wet-spinning, resulting in a continuous microfibrillar network structure of PBZT followed by the precipitation of nylon.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.