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首页> 美国政府科技报告 >Solid State Extrusion of Melt-Crystallized and Solution-Grown Crystals of Nylons 6 and 66
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Solid State Extrusion of Melt-Crystallized and Solution-Grown Crystals of Nylons 6 and 66

机译：Nylons 6和66的熔融结晶和溶液生长晶体的固态挤出

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Melt and solution grown crystals of nylons 6 and 66 have been solid state extruded to examine the relationships among thermal behavior, crystallinity, orientation and modulus. Unextruded and extruded samples were examined by thermal analysis, wide angle x-ray and by tensile testing. An extrusion draw ratio (EDR) of 4.0 was attained for all samples. At this EDR, modulus and crystallinity are linearly related over a wide range up to 60% crystallinity. The highest tensile modulus of 6.7 GPa was attained for both polymers in estrudates of solution-grown crystals, although these extrudates of compacted precipitates were less oriented. This suggests that the extent of both crystallinity and draw play an important role in the enhancement of modulus. (Author)

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