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主要研究了在不同温度下,振动外场对线型低密度聚乙烯(LLDPE)/超高分子量聚乙烯(UHMWPE)纤维共混体系结晶行为的影响。扫描电镜(SEM)分析结果表明,在125℃或150℃下施加振动后,LLDPE/UHMWPE纤维共混体系都形成了串晶结构,而升高温度不利于串晶结构的形成。差示扫描量热分析(DSC)的结果也表明,施加振动后共混体系出现了特殊晶体。广角X射线衍射分析(WAXD)的结果表明,施加振动后共混体系的取向度得到了提高。力学性能测试结果表明,施加振动后共混体系的拉伸强度有所提升。
The effects of external vibration on the crystallization behavior of linear low density polyethylene (LLDPE) / ultrahigh molecular weight polyethylene (UHMWPE) fiber blends at different temperatures were investigated. Scanning electron microscopy (SEM) results showed that the LLDPE / UHMWPE fiber blends all formed a string structure when vibration was applied at 125 ℃ or 150 ℃, while the increase of temperature was unfavorable to the formation of string-like structure. The results of differential scanning calorimetry (DSC) also showed that there were special crystals in the blend system after vibration was applied. The result of wide-angle X-ray diffraction analysis (WAXD) shows that the degree of orientation of the blended system is improved after vibration is applied. The test results of mechanical properties show that the tensile strength of the blends increases after vibration is applied.