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首页> 外文期刊>Journal of Polymer Science, Part B. Polymer Physics >Deformation in lamellar and crystalline structures: in situ simultaneous small-angle X-ray scattering and wide-angle X-ray diffraction measurements on polyethylene terephthalate fibers
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Deformation in lamellar and crystalline structures: in situ simultaneous small-angle X-ray scattering and wide-angle X-ray diffraction measurements on polyethylene terephthalate fibers

机译：层状和晶体结构中的变形：聚对苯二甲酸乙二醇酯纤维的原位同时小角度X射线散射和广角X射线衍射测量

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Changes in the lamellar and crystalline structures were followed as a function of Applied stress to understand the influence of the interactions between the crystalline and amorphous domains on the fiber properties. We observed a reversible transformation from a structure giving a four-point small-angle pattern to a structure giving. a two-point pattern; these structures corresponded to the lamellae with oblique and normal lamellar surfaces respectively. The characteristics of these two structures such as the stack diameter, stack height, and tilt angle were different and were determined by the, processing conditions and did not change when the fiber was elastically deformed. The structure giving a two-point pattern was probably the load-carrying lamellar entity in these fibers. The diameter of the lamellar stacks,. tilt angle of the lamellae, And the strain, in the, lamellar spacing appeared to have the most influence on properties such as tenacity and dimensional stability. The long-spacing strain, Which is about the same as the fiber strain, determined the modulus at low elongation as: well As ultimate elongation. These indicate that the lamellar stacks have At least as much influence as the interfibrillar chains on fiber properties. Structural features that determine the performance in semicrystalline polymers were investigated by, analyzing four generations of polyethylene terephthalate fibers. Some of the fiber properties correlate with changes in the crystalline domains such as the crystalline orientation, sized and unit cell dimensions. Fibers in which the crystalline strain was large because of their strong linkages to the amorphous chains, and better load transfer, had the highest modulus and lowest ultimate elongation. (C) 2003 Wiley Periodicals, Inc. [References: 35]
机译：跟随层状和晶体结构的变化，作为施加应力的函数，以了解晶体和非晶域之间的相互作用对纤维性能的影响。我们观察到从提供四点小角度图案的结构到提供结构的可逆转换。两点模式;这些结构分别对应于具有倾斜和正常层状表面的薄片。这两种结构的特性，例如堆叠直径，堆叠高度和倾斜角是不同的，并且由加工条件决定，并且当纤维弹性变形时没有变化。给出两点图案的结构可能是这些纤维中的承载层状实体。层状叠层的直径。片层的倾斜角，以及片层间距中的应变似乎对强度和尺寸稳定性等特性影响最大。与纤维应变大约相同的长间隔应变确定了低伸长率时的模量，以及：极限伸长率。这些表明层状叠层对纤维性能的影响至少与原纤维间链相同。通过分析四代聚对苯二甲酸乙二醇酯纤维，研究了决定半结晶聚合物性能的结构特征。某些纤维性质与晶体域的变化相关，例如晶体取向，尺寸和晶胞尺寸。结晶应变大的纤维由于其与非晶链的牢固键合以及较好的载荷传递而具有最高的模量和最低的极限伸长率。 （C）2003 Wiley Periodicals，Inc. [参考：35]

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