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Compatibilization of Blends of Polystyrene and Zinc Salt of Sulfonated Polystyrene by Poly(styrene-b-4-vinylpyridine) Diblock Copolymer by Shengqing Xu; Tao Tang; Bin Chen; Baotong Huang is a Materials Science article available to read on EtoBox.

What is Compatibilization of Blends of Polystyrene and Zinc Salt of Sulfonated Polystyrene by Poly(styrene-b-4-vinylpyridine) Diblock Copolymer about?

The compatibilizing effect and mechanism of poly(styrene-b-4-vinylpyridine) diblock copolymer, P(S-b-4VPy), on the immiscible blend of polystyrene (PS)/zinc salt of sulphonated polystyrene (Zn-SPS) were studied. SEM results show that the domains of the dispersed phase in the blend become finer. DSC experiments reveal that the difference between the two T g 's corresponding to the phases in the blends becomes larger on addition of P(S-b-4VPy), mainly resulting from dissolving of the poly(4-vinylpyridine (P4VPy) block in the Zn-SPS phase. FTIR analysis shows that compatibility of P4VPy and Zn-SPS arises from the stoichiometric coordination of the zinc ions of Zn-SPS and pyridine nitrogens of P4VPy. SAXS analysis indicates the effect of the P(S-b-4VPy) content on the structure of the compatibilized blends. When the content of the block copolymer is lower than 4.1 wt%, the number of ion pairs in an aggregate in the Zn-SPS becomes smaller, and aggregates in ionomer in the blend become less organized with increasing P(S-b-4VPy). When the P(S-b-4VPy) content in the blend is up to 7.4 wt%, a fraction of P(S-b-4VPy) form a separate domain in the blend.

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Author

Shengqing Xu; Tao Tang; Bin Chen; Baotong Huang

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0032-3861)

Published

1999

Language

EN

Field

Materials Science (Physical Sciences)