Spherulites of rigid chain ladder polyphenylsilsesquioxane (PPSQ) were produced through solvent-induced crystallization. The influences of solution concentration, solvent evaporation time, and temperature on the spherulitic morphology of PPSQ were studied by optical microscopy. Diluting the solution was found to have the same effect as elevating the crystallization temperature. The size of the spherulites increases with either decreasing concentration or increasing temperature. This is caused by the enhanced solubility of PPSQ in xylene under such conditions. Extending the solvent evaporation time while leaving the other conditions unchanged also leads to the formation of larger spherulites. The invariance of spherulitic structure upon sample rotation suggests that the spherulites possess a uniform crystallographic orientation. The negative optical characteristics of spherulites indicates that the PPSQ molecular chains are oriented in the tangential direction of the spherulite. Considering the high rigidity of the molecules, an organization model of PPSQ spherulite is proposed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.