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摘要: 高密度聚乙烯(HDPE)在1~2 GPa的静高压下发生熔体结晶。用压缩的方法对经过高压处理后的样品进行了杨氏模量的测量。测量结果表明:样品的杨氏模量随压力和结晶度的增加而增大,最大值达到1.46 GPa。伸直链晶体的形成是杨氏模量增加的重要因素。Abstract: High density polyethylene was crystallized at static high pressure from 1 GPa to 2 GPa. The Young's modulus of the sample treated by high-pressure compression was measured with the compression method. The results show that the Young's modulus is increased both with the pressure and the crystallinity, and its maximum value is 1.46 GPa. The formation of the extended-chain crystal is an important factor for the increase of Young's modulus.
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Key words:
- extended-chain crystal /
- polyethylene /
- Young's modulus
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吕锡慈. 高分子材料的强度与破坏. 成都: 四川教育出版社, 1988. 吴瑞琪, 王惠, 杨光群, 等. 高压物理学报, 1989, 3(2): 165-171. Hoehn H H, Ferguson R C, Hebert R R. Polymer Eng Sci, 1978, 18(6): 457. Kama J Wahlstrand. Polymer, 1988, 29: 268-266.
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