Sequence Analyses in PDPS/PDMS Statistical Random Copolymers | Zendy

Yang MeiHui | Zendy; Hwang YeunHsing | Zendy; Liu JiannChang | Zendy

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Sequence Analyses in PDPS/PDMS Statistical Random Copolymers

Author(s) -

Yang MeiHui,

Hwang YeunHsing,

Liu JiannChang

Publication year - 1999

Publication title -

journal of the chinese chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.329

H-Index - 45

eISSN - 2192-6549

pISSN - 0009-4536

DOI - 10.1002/jccs.199900105

Subject(s) - copolymer , triad (sociology) , chemistry , sequence (biology) , polymer chemistry , series (stratigraphy) , polymer , organic chemistry , psychology , paleontology , biochemistry , psychoanalysis , biology

The anionic copolymerization of hexaphenylcyclotrisiloxane (P 3 ) and hexamethylcyclotrisiloxane (D 3 ) under non‐equilibrium conditions was carried out for synthesizing a series of poly(diphenylsiloxane‐ stat ‐dimethylsiloxane) copolymers. The sequence analyses of these copolymers were studied. Sequence distribution up to the pentad level is observable in the 1 H NMR spectrum. The sequence distributions calculated from a pentad model by using Bovey's method, interpret the 1 H NMR spectra (SiCH 3 only) of all the copolymers very well. However, the triad model was only valid for relatively lower P 3 content (< 50 mol%) copolymers.

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