聚丁二酸丁二醇酯/聚乙二醇硬脂酸酯共混物结晶行为

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英文篇名：Crystallization Behavior of Poly(butylene succinate) and Polyethylene Glycol Stearate Blends 作者：黄勇 ; 刘俊红 ; 杨永斌 英文作者：Yong Huang;Junhong Liu;Yongbin Yang;College of Chemical Engineering, Sichuan University of Science & Engineering;Department of Chemical Engineering, Sichuan Vocational College of Chemical Technology; 关键词：聚丁二酸丁二醇酯 ; 聚乙二醇硬脂酸酯 ; 结晶行为 ; 共混物 英文关键词：poly(butylene succinate);;polyoxyethylene stearate;;crystallization behavior;;blends 中文刊名：GFZC 英文刊名：Polymer Materials Science & Engineering 机构：四川理工学院化学工程学院;四川化工职业技术学院化学工程系; 出版日期：2019-03-11 11:18 出版单位：高分子材料科学与工程 年：2019 期：v.35 基金：四川省科技支撑计划项目(2016FZ0033);; 泸州市科技计划项目(2016-S-63(1/3) 语种：中文; 页：GFZC201902015 页数：6 CN：02 ISSN：51-1293/O6 分类号：96-101

摘要

用溶液共混的方法制备了聚丁二酸丁二醇酯(PBS)/聚乙二醇硬脂酸酯(PEOST)共混物。采用差示扫描量热法(DSC)表征了共混物的结晶熔融行为。研究结果表明,加入质量分数5%的PEOST能使PBS结晶温度(T_c)降低约10℃,但使熔融温度(T_m)升高约3℃,继续增加PEOST用量对PBS的T_c和T_m影响不大;PBS的结晶焓(ΔH_c)随PEOST含量的增加呈上升趋势,而熔融焓(ΔH_m)先降低再上升;PEOST的结晶属于受限结晶,当其质量分数低于10%,DSC曲线中没有出现PEOST的结晶峰和熔融峰;当质量分数大于20%时,才出现PEOST结晶峰和相应的熔融峰。傅里叶变换红外(FT-IR)谱图中也才出现相应的结晶红外响应峰(1107 cm~(-1)和841 cm~(-1))。广角X射线衍射显示加入PEOST未改变PBS的晶体结构。偏光显微镜分析表明,PEOST含量较高的共混物晶体尺寸更大,具有更清晰的周期性明暗相间的环带花纹。
        Poly(butylene succinate)(PBS) and polyoxyethylene stearate( PEOST) blends were prepared by the method of solution blending. The crystallization behavior of the blends were studied by DSC. The results show that when the mass fraction of PEOST reaches 5%, the crystallization temperature(T_c) of PBS is reduced about 10 ℃, instead the melting temperature(T_m) of PBS is improved about 3 ℃. However, the more content of PEOST added has little effect on the T_c and T_m of PBS. The ΔH_c of PBS increases with the increase of PEOST content, while the ΔH_m decreases first and then increases. The crystallization of PEOST belongs to confined crystallization. When the mass fraction of PEOST is less than 10%, no PEOST crystallization and melting peaks appear in the DSC curves, but emerge as the content is more than 20%. Also both T_c and T_m increase with the increase of PEOST content. When the mass fraction of PEOST is greater than 20%, the infrared response peaks of the PEOST crystals appear in the infrared spectra(1107 cm~(-1) and 841 cm~(-1)). WAXD shows that the crystal structures of PBS are not changed by PEOST added. POM shows that the PBS crystal size in the blends with higher PEOST content is larger, and the characteristics of the spherulites are more obvious.

引文

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