THE EFFECT OF MOLECULAR-WEIGHT AND CRYSTALLINITY ON THE MECHANICAL-PROPERTIES OF INJECTION-MOLDED POLY(ARYL-ETHER-ETHER-KETONE) RESIN
THE EFFECT OF MOLECULAR-WEIGHT AND CRYSTALLINITY ON THE MECHANICAL-PROPERTIES OF INJECTION-MOLDED POLY(ARYL-ETHER-ETHER-KETONE) RESIN
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DOI：
10.1016/0032-3861(94)90057-4
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发表时间：
1994-01-01
期刊：
影响因子：
4.6
通讯作者：
MOORE, DR
中科院分区：
文献类型：
--
作者：
CHIVERS, RA;MOORE, DR
注塑成型的聚（芳醚-醚-酮）（PEEK）树脂的分子量范围为M(W) =15 000-50 000，样品经过了各种热处理，并测量了所得材料的性能。研究发现，通过退火可以提高结晶性，但有效上限值取决于分子量，即M(W)越高，最大结晶度越低。聚合物的拉伸模量和屈服强度随着结晶度的增加而增加，但分子量在这些情况下没有明显的影响。相反，结晶度和分子量分别影响韧性。韧性随分子量的增加而增加，随结晶度的增加而降低。讨论了这些影响对聚醚醚酮组分注塑成型的影响。
Samples of injection moulded poly(aryl-ether-ether-ketone) (PEEK) resin with molecular weights covering the range, M(W) =15 000-50 000, have been subjected to a variety of thermal treatments, and the resulting material properties measured. It was found that crystallinity could be increased by annealing the mouldings, but also that an effective ceiling value depended on the molecular weight, i.e. the higher the M(W), the lower the maximum crystallinity. Tensile modulus and yield strength of the moulded polymer increased with increasing crystallinity, but the molecular weight had no detectable effect in these cases. In contrast, both crystallinity and molecular weight independently influenced the toughness. Toughness was found to increase with increasing molecular weight, and to decrease with increasing crystallinity. Implications of these effects on the injection moulding of components of PEEK are discussed.