Solution viscosities of ethylene–propylene copolymers in oils

Autor:	Ashish Sen, Isaac D. Rubin
Rok vydání:	1990
Předmět:	Materials science Ethylene Polymers and Plastics General Chemistry Ethylene propylene rubber Surfaces Coatings and Films Amorphous solid Viscosity Crystallinity chemistry.chemical_compound Chemical engineering chemistry Polymer chemistry Materials Chemistry Copolymer Chemical solution
Zdroj:	Journal of Applied Polymer Science. 40:523-530
ISSN:	1097-4628 0021-8995
DOI:	10.1002/app.1990.070400318
Popis:	Viscosities were obtained on oil solutions of ethylene-propylene copolymers with 58-80 mol% ethylene. For amorphous copolymers, intrinsic viscosities and equivalent hydrodynamic volumes showed little variation from −10 to 50°C. They decreased precipitously at low temperature for a partially crystalline copolymer with 80 mol% ethylene. The data can be explained by postulating that more ethylene and resulting crystallinity lead to ordered domains in solution at low temperatures, giving rise to additional contraction of the copolymer above that expected for a totally amorphous material.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f157db2daffbd4b4f6c50adbeea9f68f https://doi.org/10.1002/app.1990.070400318 Zobrazit plný text záznamu Plný text