The crystalline structure evolution of poly(butylene terephthalate)/poly(carbonate) (PBT/PC) during stretching was investigated by in situ synchrotron wide-angle X-ray scattering (WAXS) and small-angle X-ray scattering (SAXS) at 70 °C. The WAXS results demonstrated that the crystallinity and crystallite size (D₁₀₀) decrease with deformation. The α–β transition was observed during the deformation of PBT/PC blends. The orientation degree of the PBT (100) diffraction increases with strain in the PBT/PC blends. The SAXS data showed that PC is located in the interlamellar region of PBT for the undeformed samples. A structure model was proposed to describe the stretching-induced structure evolution of the PBT/PC blends.

中文翻译：

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单轴拉伸过程中聚对苯二甲酸丁二酯/碳酸酯共混物的形变诱导结构演变

通过原位同步加速器广角X射线散射（WAXS）和小角X射线散射（SAXS）考察了拉伸过程中聚对苯二甲酸丁二醇酯/聚碳酸酯（PBT / PC）的晶体结构演变。70°C。WAXS结果表明，结晶度和微晶尺寸（D ₁₀₀）随着变形而减小。在PBT / PC共混物的变形过程中观察到了α-β过渡。PBT / PC共混物中PBT（100）衍射的取向度随应变而增加。SAXS数据显示，对于未变形的样品，PC位于PBT的层间区域。提出了一种结构模型来描述PBT / PC共混物的拉伸诱导结构演变。