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Blends of poly[3,3‐bis(chloromethyl)oxetane] with poly(vinyl acetate). I. Thermal and mechanical properties

journal contribution
posted on 1992-11-25, 00:00 authored by L Weilian, Qipeng Guo, F Zhiliu
Blends of poly[3,3‐bis(chloromethyl)oxetane] (Penton) with poly(vinyl acetate) were prepared. Compatibility, morphology, thermal behavior, and mechanical properties of blends with various compositions were studied using differential scanning calorimetry (DSC), dynamic mechanical measurements (DMA), tensile tests, and scanning electron microscopy (SEM). DMA study showed that the blends have two glass transition temperatures (Tg). The Tg of the PVAc rich phase shifts significantly to lower temperatures with increasing Penton content, suggesting that a considerable amount of Penton dissolves in the PVAc rich phase, but that the Penton rich phase contains little PVAc. The Penton/PVAc blends are partially compatible. DSC results suggest that PVAc can act as a β‐nucleator for Penton in the blend. Marked negative deviations from simple additivity were observed for the tensile strength at break over the entire composition range. The Young's modulus curve appeared to be S‐shaped, implying that the blends are heterogeneous and have a two‐phase structure. This was confirmed by SEM observations.

History

Journal

Journal of applied polymer science

Volume

46

Issue

9

Pagination

1645 - 1651

Publisher

John Wiley & Sons

Location

Chichester, Eng.

ISSN

1097-4628

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

1992, John Wiley & Sons, Inc

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