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首页> 外文期刊>Journal of Applied Polymer Science >Structural changes in the melt spinning, cold drawing, and annealing of poly(4-methylpentene-1) fibers
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Structural changes in the melt spinning, cold drawing, and annealing of poly(4-methylpentene-1) fibers

机译：聚（4-甲基戊烯-1）纤维的熔融纺丝，冷拔和退火过程中的结构变化

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Isotactic poly(4-methylpentene-1) melt-spun fibers were investigated. Prior investigators of melt-spun fibers found that these fibers have a tetragonal unit cell (Form 1). We obtained the same unit cell structure in melt-spun fibers. We found that higher draw-down-ratio fibers had d-spacings closer to the previously cited values of Form I. We also found that cold-drawn fibers had similar values to those of melt-spun fibers. However, after these were annealed at 200 degrees C, the unit cell was changed. It is possible that this new unit cell was the orthorhombic form of He and Porter. We also observed the birefringence of these fibers. The values changed after the melt-spun fibers were cold drawn and annealed. The melt-spun fiber values reached 0.006. The values for the drawn fibers were as high as 0.007. We suggest that the intrinsic birefringence is about 0.0075. (c) 2005 Wiley Periodicals, Inc.
机译：研究了全同立构的聚（4-甲基戊烯-1）熔纺纤维。先前的熔纺纤维研究人员发现，这些纤维具有四方晶胞（晶型1）。我们在熔纺纤维中获得了相同的晶胞结构。我们发现较高的拉伸比纤维的d间距接近于先前引用的I型值。我们还发现，冷拉伸纤维的值与熔纺纤维的值相似。然而，在将它们在200℃下退火之后，更换了晶胞。这个新的晶胞可能是He和Porter的正交晶体形式。我们还观察到这些纤维的双折射。在将熔纺纤维冷拉伸并退火之后，该值改变。熔纺纤维值达到0.006。拉伸纤维的值高达0.007。我们建议固有双折射约为0.0075。 （c）2005年Wiley Periodicals，Inc.

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