MCROSTRUCTURE AND MECHANICAL PROPERTIES OF POLYMERSOBTAINED BY LASER HEATING DRAWING METHOD

本研究发现，在给定的高激光功率和低负载条件下，采用二氧化碳碳激光加热方法制备了小直径纤维。激光加热应用于各种纤维，如聚对苯二甲酸乙酯纤维、尼龙6纤维和等规聚丙烯纤维。在低负载下，高功率激光加热直径约为140 μm的聚酯纤维后，其直径明显减小至4.5 μm。当激光分两步加热时，得到的PET纤维直径约为2 μm。小直径纤维的杨氏模量为17 Gpa，拉伸强度为1 Gpa，结晶度和取向度较高。结果表明，激光加热是制备小直径光纤的有效方法。

In this study, it was found that small diameterfibers was prepared by a dioxide carbon laser heating method carried out under given conditions of high laser power and low load. The laser heating was applied to various fibers such as poly(ethylene terephthalate) fibers, nylon 6 fiber, and isotactic polypropyle fibers. As-spun PET fibers with a diameter of about 140 μm were heated by the laser with high power under low load, and then their diameter significantly decreased to 4.5 μm. Furthermore, when the laser heating was carrried out in two steps, the PET fibers obtained had a diameter of about 2 μm. The small diameter fiber had a Young's modulus of 17 Gpa and tmsile strength of 1 Gpa and showed hjgh degree of crystallinity and orientation. As the results, the laser heating was found to be effective preparing the small diameter fibers.