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首页> 外文期刊>Journal of Applied Polymer Science >Heterogeneous nucleation of nylon 6 and PET with selected inorganic compounds
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Heterogeneous nucleation of nylon 6 and PET with selected inorganic compounds

机译：尼龙6和PET与选择的无机化合物的非均相成核

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摘要

The effect of several inorganic compounds in the heterogeneous nucleation of poly(ethylene terephthalate) (PET) and poly(caprolactam) (nylon 6) was studied. Six inorganic chemicals were specifically selected, on the basis of their crystal structure, basal lattice dimensions, and thermal properties, in order to study the effect of temperature in their nucleation capabilities. Considering that temperature is one of the most important variables involved during processing of thermoplastics, the impact of the nucleation ability of the intentionally added heterogeneities was studied in terms of thermal conductivity, thermal expansion, and heat capacity. Six inorganic chemicals, which crystallize in the cubic system, were selected considering that they had variations in one of the thermal properties while the others remained practically constant along the temperature range of interest. The results indicated that, at constant surface area, chemical compounds with lower overall values of thermal expansion and also those with overall higher values of heat capacity promote heterogeneous nucleation; the effect of heat capacity was, however, also found potentially related to a different intrinsic mechanism. The impact of thermal conductivity was not considered significant. (C) 2003 Wiley Periodicals, Inc. [References: 30]
机译：研究了几种无机化合物对聚对苯二甲酸乙二醇酯（PET）和聚己内酰胺（尼龙6）异相成核的影响。根据六种无机化学物质的晶体结构，基础晶格尺寸和热性能，专门选择了六种无机化学物质，以研究温度对其成核能力的影响。考虑到温度是热塑性塑料加工过程中涉及的最重要的变量之一，因此从导热率，热膨胀和热容方面研究了故意添加的异质性的成核能力的影响。选择六种在立方晶系中结晶的无机化学品，要考虑它们在一种热性质上的变化，而另一种在感兴趣的温度范围内实际上保持恒定。结果表明，在恒定的表面积下，热膨胀总值较低的化合物以及热容总值较高的化合物会促进异相形核。然而，还发现热容量的影响可能与不同的内在机理有关。热导率的影响被认为不重要。 （C）2003 Wiley Periodicals，Inc. [参考：30]

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