Block polymers from isocyanate-terminated intermediates. II. Preparation of butadiene–ε-caprolactam and styrene–ε-caprolactam block polymers

Autor:	William L. Hergenrother, Richard J. Ambrose
Rok vydání:	1974
Předmět:	chemistry.chemical_classification Materials science Stereochemistry Extraction (chemistry) Caprolactam Polymer Block (periodic table) Isocyanate Styrene chemistry.chemical_compound chemistry Polymer chemistry Copolymer Melting point
Zdroj:	Journal of Polymer Science: Polymer Chemistry Edition. 12:2613-2622
ISSN:	1542-9369 0360-6376
DOI:	10.1002/pol.1974.170121114
Popis:	Polystyrene–nylon 6 and polybutadiene–nylon 6 block copolymers have been prepared from isocyanate-terminated prepolymers. From extraction and fractionation data the products obtained were found to be mixtures of both homopolymers and pure block copolymer. The polybutadiene–nylon 6 copolymers are extremely pliable at ambient temperatures even at high ϵ-caprolactam contents (70–80 wt-%). This is true even though these copolymers show a crystalline melting point at 213°C similar to poly-ϵ-caprolactam. Presumably this unusual behavior occurs because of the nature of the synthesis which renders the butadiene portion of these copolymers the continuous phase. Plasticity measurements indicate that pliability is dependent on the molecular weight of the block poly-ϵ-caprolactam.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::45686c89fdd946c2cca509ecdd4e8839 https://doi.org/10.1002/pol.1974.170121114 Zobrazit plný text záznamu Plný text