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Interface in styrene-butadiene copolymers and blends: a solid state 1h-nmr study

✍ Scribed by A.L. Segre; D. Capitani; P. Fiordiponti; P.L. Cantini; A. Callaioli; A. Ferrando; R. Nocci

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
480 KB
Volume
28
Category
Article
ISSN
0014-3057

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✦ Synopsis

Akstraet--Pulse low resolution ~H-NMR was used to characterize commercial experimental transparent styrene-butadiene (SB) block copolymers, high impact polystyrene and blends. The free induction decay (FID) shows the presence of two components: the first, fast decaying, is due to polystyrene, while the second, slow decaying, is due to the interface and to polybutadiene. This last FID component shows the presence of two Tj relaxations; they have been interpreted respectively as due to the interface material and to the pure rubbery polybutadiene. A fast method for the study of SB copolymers and blends is proposed.

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## Abstract The domain thicknesses and the heterogeneity of the chain dynamics of PS__‐b‐__PMMA diblock copolymers with different molar masses was studied by ^1^H and ^13^C solid‐state NMR. The chain dynamics heterogeneity of different components and inside the interfacial region was investigated b