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在工程热塑料中表征结晶度的差异
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| In the manufacture of molded plastic parts, the crystallinity of the polymer achieved during processing often determines the final performance of the part. This crystallinity is in turn determined by the temperature of the mold and the rate of cooling as the molten polymer fills the mold. Suppliers of injection molded parts often find that the desired end-use performance (eg. toughness) of molded parts are not uniform across the part which implies that their mold temperature is not uniform. Conventional differential scanning calorimetry (DSC) evaluation of sections of these molded parts, which are expected to be more or less crystalline based on their relative position in the mold, however, does not show differences in crystallinity. Hence, it appears that another more sensitive technique is needed to detect the expected differences in crystallinity. |
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2017-03-01 11:10:04, 313.63 K
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