SLOW CRACK-GROWTH OF BLENDS OF HIGH-DENSITY AND LINEAR LOW-DENSITY POLYETHYLENES AS INFLUENCED BY MORPHOLOGY

POLYMER

卷:35

Article

ZHOU, ZQ ; BROWN, N

关键词: SLOW CRACK GROWTH;    BLENDS;    POLYETHYLENE;   

DOI  :  10.1016/0032-3861(94)90537-1

来源: Elsevier

【 摘 要 】

A high density polyethylene homopolymer was blended with a linear low density ethylene hexene copolymer over the composition range of 0-100%. The resistance to slow crack growth was measured by a notched tensile test under constant load at 42, 60 and 80-degrees-C. The morphology was varied by slow cooling, quenching and annealing at 129-degrees-C for 24 h. Whereas the resistance to slow crack growth increased by a factor of 10(6) over the composition range, the differences in morphology could only change the resistance to slow crack growth at the most by a factor of approximately 3. The effect of temperature was independent of the effect of composition on slow crack growth. The effects of molecular and morphological structure are discussed.

【 授权许可】

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