Properties of some rodlike polymers in solution

Autor:	H. Ohnuma, C.-P. Wong, Guy C. Berry
Rok vydání:	2007
Předmět:	chemistry.chemical_classification Materials science General Engineering Viscometer Polymer Kevlar Solvent Shear rate Viscosity Rheology chemistry Chemical engineering Ionic strength Composite material
Zdroj:	Journal of Polymer Science: Polymer Symposia. 65:173-192
ISSN:	1936-0959 0360-8905
DOI:	10.1002/polc.5070650116
Popis:	The properties of poly (1, 4-phenylene terephthalamide) (PPTA), Kevlar, and a poly(benzobisoxazole) (PBO) in solution are investigated. Molecular characterization using light scattering and viscometry on dilute solutions shows PBO and PPTA to have a rodlike conformation. Both are prone to interchain aggregation with the tendency for association apparently increasing with the ionic strength of the solvent. Rheological experiments are reported on disordered and ordered concentrated solutions of Kevlar and PBO. The dependence of the viscosity and recoverable compliance on shear rate is discussed and compared with that of flexible-chain polymers. The dependence of the viscosity and recoverable compliance of PBO solutions on temperature and concentration is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5b5cd1895647e118f5432518002fba46 https://doi.org/10.1002/polc.5070650116 Zobrazit plný text záznamu