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有机改性蒙脱土对聚乳酸-聚丁二酸丁二醇酯合金的增容效应

吕若昀 田瑶 张杰 彭亚 唐逸铭 余鹏

吕若昀, 田瑶, 张杰, 等. 有机改性蒙脱土对聚乳酸-聚丁二酸丁二醇酯合金的增容效应[J]. 复合材料学报, 2021, 39(0): 1-11
引用本文: 吕若昀, 田瑶, 张杰, 等. 有机改性蒙脱土对聚乳酸-聚丁二酸丁二醇酯合金的增容效应[J]. 复合材料学报, 2021, 39(0): 1-11
Ruoyun LV, Yao TIAN, Jie ZHANG, Ya PENG, Yiming TANG, Peng YU. Compatibilization of poly(lactic acid)-poly(butylene succinate) blends by using organic modified montmorillonite as a compatibilizer[J]. Acta Materiae Compositae Sinica.
Citation: Ruoyun LV, Yao TIAN, Jie ZHANG, Ya PENG, Yiming TANG, Peng YU. Compatibilization of poly(lactic acid)-poly(butylene succinate) blends by using organic modified montmorillonite as a compatibilizer[J]. Acta Materiae Compositae Sinica.

有机改性蒙脱土对聚乳酸-聚丁二酸丁二醇酯合金的增容效应

基金项目: 大学生创新创业训练计划项目(201910500003)
详细信息
    通讯作者:

    余 鹏 ,博士,副教授,硕士生导师,研究方向为生物可降解材料  E-mail: yupeng@mail.hbut.edu.cn

  • 中图分类号: TB332

Compatibilization of poly(lactic acid)-poly(butylene succinate) blends by using organic modified montmorillonite as a compatibilizer

  • 摘要: 为了获得综合性能优良的聚乳酸基生物可降解复合材料,利用二甲基双十八烷基氯化铵有机改性蒙脱土(OMMT)作为非反应型增容剂,通过直接熔融共混法制备了有机改性蒙脱土/聚乳酸-聚丁二酸丁二醇酯(OMMT/PLA-PBS)复合材料,研究了OMMT含量对PLA-PBS共混体系的增容效果及其对力学性能的影响规律。微观结构表明,OMMT能够显著降低分散相PBS的粒径和均匀粒径分布,分布在PLA与PBS相界面处的OMMT,起到了类似嵌段共聚物的增容作用,增加了PLA与PBS之间的黏结力。动态流变结果表明,当OMMT含量为3wt%时,OMMT在PLA-PBS共混物中形成三维网络结构。动态热机械性能结果显示,添加OMMT后,OMMT/PLA-PBS复合材料中PLA相与PBS相对应的玻璃化转变温度相互靠拢,当OMMT含量为1wt%时,PLA与PBS的玻璃化转变温度相互靠拢的幅度最大,增容效果最好。热性能数据表明,加入OMMT后,复合材料中PLA的结晶度出现先增加后降低的变化趋势,在OMMT含量为1wt%时,PLA结晶度达到最大值12.7%。力学性能结果表明,当OMMT含量为1wt%时,OMMT/PLA-PBS复合材料的综合力学性能达到最佳,拉伸强度和冲击强度分别为62.5 MPa和12.6 kJ/m2,较PLA-PBS共混物分别提高了32.1%和80%。

     

  • 图  2  不同OMMT含量的OMMT/PLA-PBS复合材料TEM图像

    Figure  2.  TEM micrographs of OMMT/PLA-PBS composites with different OMMT contents

    图  3  分散在界面处的OMMT增容PLA与PBS的示意图

    Figure  3.  Schematic illustration of compatibilization effect of OMMT located at interface between PLA and PBS

    图  4  OMMT以及不同OMMT含量的OMMT/PLA-PBS复合材料的XRD曲线

    Figure  4.  XRD curves of OMMT and OMMT/PLA-PBS composites with different OMMT contents

    图  5  OMMT/PLA-PBS复合材料的动态流变性能曲线

    Figure  5.  Dynamic rheological property curves of OMMT/PLA-PBS composites

    图  6  OMMT/PLA-PBS复合材料的动态热机械性能曲线

    Figure  6.  Dynamic thermo-mechanical property curves of OMMT/PLA-PBS composites

    图  7  OMMT/PLA-PBS复合材料的DSC热流曲线

    Figure  7.  DSC heat flow curves of OMMT/PLA-PBS composites

    图  8  OMMT/PLA-PBS复合材料的拉伸性能

    Figure  8.  Tensile properties of OMMT/PLA-PBS composites

    图  9  OMMT/PLA-PBS复合材料的冲击强度

    Figure  9.  Impact strength of OMMT/PLA-PBS composites

    表  1  OMMT/PLA-PBS复合材料组成配比(wt%)

    Table  1.   Formulation of OMMT/PLA-PBS composites(wt%)

    SamplesMass fraction of PLAMass fraction of PBSMass ratio of OMMT
    PLA-PBS80200
    0.5wt%OMMT/PLA-PBS80200.5
    1wt%OMMT/PLA-PBS80201
    2wt%OMMT/PLA-PBS80202
    3wt%OMMT/PLA-PBS80203
    下载: 导出CSV

    表  2  从损耗模量和力学损耗角正切得到PLA, PBS 和OMMT/PLA-PBS复合材料的玻璃化转变温度

    Table  2.   Glass transition temperature of PLA, PBS and OMMT/PLA-PBS composites obtained from loss modulus and loss tangent

    SampleLoss modulus G″Loss tangent tan δ
    Tg, PBS/℃Tg, PLA/℃Tg PBS/℃Tg, PLA/℃
    PLA/61.0/67.3
    PLA-PBS−22.560.5−17.666.9
    0.5wt%OMMT/PLA-PBS−21.760.4−17.566.5
    1wt%OMMT/PLA-PBS−18.458.5−16.164.4
    2wt%OMMT/PLA-PBS−18.459.6−16.365.8
    3wt%OMMT/PLA-PBS−19.460.1−17.865.7
    PBS−22.4−17.8/
    Notes: Tg, PBS represents the glass transition temperature of PBS phase; Tg, PLA represents the glass transition temperature of PLA phase.
    下载: 导出CSV

    表  3  从DSC热流曲线得到的OMMT/PLA-PBS复合材料的热性能参数

    Table  3.   Thermal data obtained from the DSC heat flow curves of OMMT/PLA-PBS composites

    SampleTg, PLA /°CTcc, PLA /°CTm, PBS/°CTm, PLA /°CXc ,PLA/%
    PLA-PBS59.3117.7111.9151.21.2
    0.5wt%OMMT/PLA-PBS60.1117.0114.3149.9/155.47.1
    1wt%OMMT/PLA-PBS62.8116.7114.1149.5/154.912.7
    2wt%OMMT/PLA-PBS59.8117.1114.1149.7/154.98.8
    3wt%OMMT/PLA-PBS59.3116.5114.2149.5/155.67.0
    Notes: Tg, is the glass transition temperature; Tcc, is the cold crystallization temperature; Tm is the melting temperature; Xc is the degree of crystallinity
    下载: 导出CSV
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  • 收稿日期:  2021-09-22
  • 录用日期:  2021-11-19
  • 修回日期:  2021-11-14
  • 网络出版日期:  2021-12-14

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