化工进展 ›› 2018, Vol. 37 ›› Issue (12): 4744-4751.DOI: 10.16085/j.issn.1000-6613.2018-0353

• 材料科学与技术 • 上一篇    下一篇

聚丁二酸丁二醇酯/聚乙二醇硬脂酸酯共混物非等温结晶行为

黄勇1,2, 刘俊红2, 肖金富2, 何凤霞2   

  1. 1 四川理工学院, 四川 自贡 643000;
    2 四川化工职业技术学院, 四川 泸州 646005
  • 收稿日期:2018-02-09 修回日期:2018-08-28 出版日期:2018-12-05 发布日期:2018-12-05
  • 通讯作者: 黄勇(1975-),副教授,主要从事高分子材料结构与性能的研究。
  • 作者简介:黄勇(1975-),副教授,主要从事高分子材料结构与性能的研究。E-mail:hyong0508@163.com。
  • 基金资助:
    四川省科技支撑计划(2016FZ0033)及泸州市科技计划[2016-S-63(1/3)]项目。

Non-isothermal crystallization behavior of poly(butylene succinate) and poly(ethylene glycol) stearate blends

HUANG Yong1,2, LIU Junhong2, XIAO Jinfu2, HE Fengxia2   

  1. 1 Sichuan Institute of Technology, Zigong 643000, Sichuan, China;
    2 Sichuan Vocational College of Chemical Technology, Luzhou 646005, Sichuan, China
  • Received:2018-02-09 Revised:2018-08-28 Online:2018-12-05 Published:2018-12-05

摘要: 以聚丁二酸丁二醇酯(PBS)和聚乙二醇硬脂酸酯(PEOST)为原料,采用溶液共混法制备了PEOST质量分数分别为10%(POS-10)和30%(POS-30)的两种合金材料。通过差示扫描量热法(DSC)研究了合金材料的非等温结晶行为,用莫志深(Mo)法分析了PBS的非等温结晶动力学,采用Kissinger法和Friedman法计算PBS的结晶活化能,并用红外(FTIR)和偏光显微镜(POM)进行表征。研究结果表明:PBS先结晶形成结晶微区不利于PEOST结晶,而较高含量的PEOST有利于PBS的结晶。受PBS先结晶的影响,POS-10降温DSC曲线没有出现PEOST的结晶峰,而POS-30在低的降温速率情况下出现了PEOST双结晶峰;升温DSC曲线中两试样均出现了PEOST的熔融峰。在相同的冷却速率下,POS-30的PEOST熔融温度(Tm)和熔融焓(△Hm)大于POS-10;POS-30的PBS结晶峰温度(Tp)、结晶焓(△Hc)大于POS-10,而结晶半峰宽(D)值更小;但两者的Tm和△Hm相当。随冷却速率的增加,PBS的D值增大,而PEOST的D值却降低;冷却速率的增加对PBS的Tm值影响不大,但使PEOST的Tm略有减小。Mo法适合用于共混物中PBS的非等温结晶动力学分析。POS-30的PBS绝对值结晶活化能要大于POS-10。POS-30在红外光谱谱图中出现了PEOST结晶的红外响应峰(1109cm-1和841cm-1)而POS-10没有。

关键词: 聚丁二酸丁二醇酯, 聚乙二醇硬脂酸酯, 共混物, 结晶行为, 非等温结晶动力学, 莫志深方程

Abstract: Two polymer blends were prepared by solution blending with poly(butylene succinate) (PBS) and poly(ethylene glycol) stearate (PEOST) as raw materials. The PEOST mass fraction of one polymer blends was 10% (POS-10) and the other was 30% (POS-30). The non-isothermal crystallization behaviors of the two materials were studied by differential scanning calorimetry (DSC). The non-isothermal crystallization kinetics of PBS were analyzed by Mo Zhishen (Mo) method. And the crystallization activation energy of PBS was calculated by Kissinger method and Friedman method. The blends were also characterized by Fourier transform infrared spectrum (FTIR) and Polarized optical microscopy (POM). The results showed that influenced by the first crystallization of PBS, no PEOST crystal peak appeared in the DSC cooling curve of POS-10, while double crystal peaks of PEOST appeared in POS-30 at lower cooling rate. However, in the corresponding heating DSC curves, the melting peak of PEOST appeared in all two samples. The melting temperature (Tm) and melting enthalpy (△Hm) of PEOST in POS-30 were greater than those of POS-10. Higher contents of PEOST were helpful to form PBS crystallization. With increasing PEOST contents, the crystallization peak temperature and crystallization enthalpy(△Hc) of PBS increased, while the width of crystal half slit(D) decreased. However, PEOST usages had little effect on Tm and △Hm of PBS. With increasing cooling rate, the D of PBS increased, but that of PEOST reduced. The cooling rate had little effect on the Tm of PBS, while the Tm of PEOST decreased slightly. The Mo equations well described the non-isothermal crystallization kinetics of PBS in blends. The absolute values of the activation energy of the PBS in POS-30 were greater than those of POS-10. The infrared response peaks at 1109cm-1 and 841cm-1 attributed to PEOST crystals appeared in the IR spectra of POS-30,but not emerged in POS-10.

Key words: poly(butylene succinate), poly(ethylene glycol) stearate, blends, crystallization behavior, non isothermal crystallization kinetic, Mo Zhishen equation

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