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- W3036954759 abstract "Injection molding is an important fabrication process for the molding of thermoplastics. It is generally recognized that the final properties of the injection molded part are strongly dependent upon morphology, orientation, and stress. These effects are particularly evident in a semicrystalline polymer such as syndiotactic polystyrene where the melt orientation and cooling rates can vary appreciably from point to point within the mold cavity leading to pronounced morphological and crystallinity inhomogeneities. This paper describes the effects of polymer mold temperature on the overall morphology of syndiotactic polystyrene in an injection molded tensile bar specimen. The morphology was examined in samples molded at 50°C and 160°C using polarized optical microscopy, transmission electron microscopy, and Fourier transform infrared micro-spectroscopy. A skin-core effect was found and significant structural differences existed in the skins of the samples molded at the two temperatures. Bars molded at 50°C had a shish kebab morphology at the surface (Figure 1)" @default.
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- W3036954759 date "1990-08-01" @default.
- W3036954759 modified "2023-09-25" @default.
- W3036954759 title "The skin-core morphology of injection-molded syndiotactic polystyrene" @default.
- W3036954759 cites W1965465899 @default.
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- W3036954759 doi "https://doi.org/10.1017/s0424820100178616" @default.
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