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玻纤质量分数对短玻纤增强聚丙烯水辅助共注塑管件的影响

匡唐清 朱瑶瑶 柳和生 赖家美 钟罗浩

匡唐清, 朱瑶瑶, 柳和生, 等. 玻纤质量分数对短玻纤增强聚丙烯水辅助共注塑管件的影响[J]. 复合材料学报, 2022, 39(10): 1-10 doi: 10.13801/j.cnki.fhclxb.20211101.001
引用本文: 匡唐清, 朱瑶瑶, 柳和生, 等. 玻纤质量分数对短玻纤增强聚丙烯水辅助共注塑管件的影响[J]. 复合材料学报, 2022, 39(10): 1-10 doi: 10.13801/j.cnki.fhclxb.20211101.001
Tangqing KUANG, Yaoyao ZHU, Hesheng LIU, Jiamei LAI, Luohao ZHONG. Effect of glass fiber mass fraction on the water assisted co-injection molding pipes of short glass fiber reinforced polypropylene[J]. Acta Materiae Compositae Sinica, 2022, 39(10): 1-10. doi: 10.13801/j.cnki.fhclxb.20211101.001
Citation: Tangqing KUANG, Yaoyao ZHU, Hesheng LIU, Jiamei LAI, Luohao ZHONG. Effect of glass fiber mass fraction on the water assisted co-injection molding pipes of short glass fiber reinforced polypropylene[J]. Acta Materiae Compositae Sinica, 2022, 39(10): 1-10. doi: 10.13801/j.cnki.fhclxb.20211101.001

玻纤质量分数对短玻纤增强聚丙烯水辅助共注塑管件的影响

doi: 10.13801/j.cnki.fhclxb.20211101.001
基金项目: 国家自然科学基金项目(51763016);江西省科技厅重点研发计划项目(20203BBE53065);江西省自然科学基金项目(20181BAB206014)
详细信息
    通讯作者:

    柳和生,博士,教授,博士生导师,主要研究方向为聚合物成型工艺 E-mail:hsliu@ecjtu.edu.cn

  • 中图分类号: TQ320.66

Effect of glass fiber mass fraction on the water assisted co-injection molding pipes of short glass fiber reinforced polypropylene

  • 摘要: 水辅助共注塑成型技术(Water-assisted co-injection molding,WACIM)是一种结合共注塑技术和水辅助注塑技术的新型注塑工艺。特定的工艺过程使得玻纤增强复合材料应用于WACIM工艺时具有特定的玻纤取向规律和增强特点。以纯聚丙烯(PP)为内层材料、不同质量分数的短玻纤增强聚丙烯(GF/PP)为外层材料制备系列WACIM管件,比较分析了实验条件下玻纤质量分数对管件壁厚、玻纤取向分布及拉伸强度的影响规律与机制。研究发现在玻纤质量分数不超过30wt%时,管件壁厚差异不明显,当玻纤质量增加到40wt%时,管件内外壁厚均增大;WACIM管件外层按玻纤取向的分布特点均可分为近界面层、中间层和近模壁层,玻纤沿流动方向的取向程度由内向外依次降低;管件的拉伸性能随着玻纤质量分数的增加呈先增后减的趋势,玻纤质量分数为30wt%时管件拉伸强度最好。与玻纤增强聚丙烯的水辅助注塑成型管件比较,发现两种工艺中玻纤质量分数对壁厚、玻纤取向分布和拉伸强度的影响有差异,影响机制有所区别。

     

  • 图  1  玻纤增强聚丙烯(GF/PP)水辅助共注塑(WACIM)管件(a)及其残余壁厚测量(b)

    Figure  1.  Glass fiber reinforced polypropylene (GF/PP) water-assisted co-injection molding (WACIM) pipe (a) and measurement of its residual wall thickness (b)

    图  2  SEM样品制备方法

    Figure  2.  Preparation of SEM samples

    图  3  SEM观测样品

    Figure  3.  Sample of SEM observation

    图  4  WACIM管件拉伸试样

    Figure  4.  Tensile specimen of WACIM pipe

    图  5  玻纤质量分数对GF/PP管件壁厚的影响

    Figure  5.  Effect of glass fiber mass fraction on GF/PP pipe wall thickness

    WAIM—Water assisted injectionmolding

    图  6  10wt%GF/PP WACIM管件的SEM图像:(a)总壁厚层;(b)外层近界面层;(c)外层中间层;(d)外层近模壁层

    Figure  6.  SEM images of 10wt%GF/PP WACIM pipe: (a) Total wall thickness layer; (b) Near interface of outer layer; (c) Middle of outer layer; (d) Near mold wall of outer layer

    图  7  20wt%GF/PP WACIM管件的SEM图像:(a)总壁厚层;(b)外层近界面层;(c)外层中间层;(d)外层近模壁层

    Figure  7.  SEM images of 20wt%GF/PP WACIM pipe: (a) Total wall thickness layer; (b) Near interface of outer layer; (c) Middle of outer layer; (d) Near mold wall of outer layer

    图  8  30wt%GF/PP WACIM管件的SEM图像:(a)总壁厚层;(b)外层近界面层;(c)外层中间层;(d)外层近模壁层

    Figure  8.  SEM images of 30wt%GF/PP WACIM pipe: (a) Total wall thickness layer; (b) Near interface of outer layer; (c) Middle of outer layer; (d) Near mold wall of outer layer

    图  9  40wt%GF/PP WACIM管件的SEM图像:(a)总壁厚层;(b)外层近界面层;(c)外层中间层;(d)外层近模壁层

    Figure  9.  SEM images of 40wt%GF/PP WACIM pipe: (a) Total wall thickness layer; (b) Near interface of outer layer; (c) Middle of outer layer; (d) Near mold wall of outer layer

    图  10  GF/PP WACIM管件近模壁层的玻纤取向演变

    Figure  10.  Evolution of glass fiber orientation near the outer mold wall of GF/PP WACIM pipe

    图  11  GF/PP WACIM管件近界面层的玻纤取向演变

    Figure  11.  Orientation evolution of glass fiber near the outer interface of GF/PP WACIM pipe

    图  12  玻纤质量分数对GF/PP管件拉伸强度的影响

    Figure  12.  Effect of glass fiber mass fraction on tensile strength of GF/PP pipe

    表  1  GF/PP WACIM管件制备工艺参数

    Table  1.   Processing parameters used to produce the test GF/PP WACIM samples

    Process parametersValue
    Outer melt temperature/℃250
    Inner melt temperature/℃210
    Inner melt injection pressure/MPa7
    Inner melt injection delay time/s3
    Water injection delay time /s4
    Water injection pressure/MPa6
    Mold temperature/℃25
    Holding time/s4
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出版历程
  • 收稿日期:  2021-08-17
  • 录用日期:  2021-10-24
  • 修回日期:  2021-10-10
  • 网络出版日期:  2021-11-02
  • 刊出日期:  2022-10-15

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