Deng Meng, Zhou Jack
R and D Division, Ethicon, a Johnson and Johnson Company, P. O. Box 151, Somerville, NJ 08876-0151, USA.
J Mater Sci Mater Med. 2006 Apr;17(4):365-9. doi: 10.1007/s10856-006-8239-5.
An investigation has been conducted on stress relaxation behaviors of polypropylene sutures under different temperatures and strain levels in a temperature-controlled water bath. The study showed that the temperature and strain level significantly affected the stress relaxation behaviors of the sutures. High temperature resulted in fast stress relaxation. The stress relaxation data could be well described by two empirical formulas. For most of the test conditions, the stress relaxation tests caused limited permanent deformation in sutures. Effects of temperature on the permanent deformation may be illustrated by a power law. The tensile properties of the sutures were not affected adversely by the stress relaxation tests, indicating good properties of polypropylene sutures.
在温度可控的水浴中，对不同温度和应变水平下聚丙烯缝线的应力松弛行为进行了研究。研究表明，温度和应变水平显著影响缝线的应力松弛行为。高温导致应力快速松弛。应力松弛数据可用两个经验公式很好地描述。对于大多数测试条件，应力松弛试验在缝线上引起的永久变形有限。温度对永久变形的影响可用幂律来说明。应力松弛试验未对缝线的拉伸性能产生不利影响，表明聚丙烯缝线性能良好。
