【摘要】 通过示差扫描量热分析、广角X射线衍射及二维广角X射线衍射等手段研究了尼龙1010在不同的拉伸比率(λ)及拉伸温度(Td)下拉伸诱导的晶体转变及结晶取向行为.结果表明,在拉伸条件下,尼龙1010易于从α晶型向δ’晶型转变,而拉伸比率的提高,有利于促进这种Brill转变.在相同的拉伸比率下,随着拉伸温度的提高,尼龙1010从δ’晶型向α晶型转变,而这种过程与无拉伸状态下的尼龙1010晶型和温度的相互关系相反.二维广角X射线衍射结果表明,尼龙1010的晶体取向度主要与拉伸比率有关,并且(002)的晶面间距随着拉伸比率的提高而增大,表明了长轴尺寸的增大对拉伸取向的依赖关系.更多还原

【Abstract】 The crystal transitions and crystal orientations of Nylon 1010 drawing-induced at different drawing temperatures(Td) and drawing ratios(λ) were studied by Differential Scanning Calorimetry(DSC),Wide-Angle X-ray Diffraction(WAXD) and two dimensional(2D) WAXD experiments.The results show that drawing is favorable to the transition of δ′ form from α form of Nylon 1010 and so-called Brill transition became more obviously with drawing ratio increasing under the same temperature.New relationship of crystal form versus temperature was first discovered in which δ′ form of Nylon 1010 could be gradually transformed into α form when drawn at higher drawing temperature.This is distincted from the crystallization performance of Nylon 1010 under thermal effect without drawing.The measurements of orientation degrees,based on 2D WAXS experiments,showed that crystal orientations were solely decided by the drawing ratios.Furthermore,the d spacing of(002) reflections increased with the drawing ratios,which also showed the dependence of long axis increasment on the drawing orientation.更多还原