Synthesis and properties of poly[bis(.gamma.-ethoxypropyl)silylene]

Autor:	Holger Frey, Gerardus J. J. Out, Martin Moeller, Dorota Greszta, Krzysztof Matyjaszewski
Rok vydání:	1993
Předmět:	chemistry.chemical_classification Polymers and Plastics Chemistry Hydrosilylation Organic Chemistry Silylene Mesophase Dichlorosilane Inorganic Chemistry Wurtz reaction chemistry.chemical_compound Polymerization Polymer chemistry Materials Chemistry Copolymer Alkyl
Zdroj:	Macromolecules. 26:6231-6236
ISSN:	1520-5835 0024-9297
DOI:	10.1021/ma00075a017
Popis:	Bis(γ-ethoxypropyl)dichlorosilane was synthetized by hydrosilylation of dichlorosilane. Polymerization yielded monomodal high molecular weight poly[bis(γ-ethoxypropyl)silylene] (PDEPS). PDEPS is soluble in alcohols with longer alkyl groups end acetone. Bulk PDEPS exhibits a blue shift of λ max from 362 to 315 nm correleted with the mesomorphic transition occurring at 25°C. Above 25°C, PDEPS transforms into a highly mobile columnerlike mesophase. Transition enthalpy, wavelength of the absorption maximum, and 29 Si MAS CP solid-state NMR indicate that PDEPS crystallizes in a disturbed all-trans-structure. In addition to PDEPS, some copolymers with di-n-hexyl-substituted units were studied
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7dd501ab86b08c96f3672167e7e3f323 https://doi.org/10.1021/ma00075a017 Zobrazit plný text záznamu