Molecular and Textural Ordering of Thermotropic Polymers in Shear Flow

Autor:	P. T. Mathers, Chang Dae Han, Angel Romo-Uribe, Kevin P. Chaffee
Rok vydání:	1996
Předmět:	chemistry.chemical_classification Crystallography Materials science Rheology Shear (geology) chemistry Scattering Polymer Composite material Flow direction Shear flow Thermotropic crystal
Zdroj:	MRS Proceedings. 461
ISSN:	1946-4274 0272-9172
DOI:	10.1557/proc-461-63
Popis:	The texture and microstructural order present in mesomorphic polymers and their relation to their macroscopic behavior has been investigated using rheological, optical and dynamic scattering (WAXS and SALS) experiments. Shear orientation is observed under constant rate-of-deformation conditions where this orientation is always parallel to the flow direction. However, the high degree of orientation suggested by optical and SALS measurements is not reflected in the degree of molecular order observed in WAXS experiments. After cessation of flow, a rapid relaxation of stress is observed, while only little microstructural relaxation is found; i.e., the state of orientation is very stable
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::862207b9f5236cbb0e9ce65cebd8da59 https://doi.org/10.1557/proc-461-63 Zobrazit plný text záznamu Full text from SpringerLink