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基于外场作用的SEBS形态演变对PPS基复合材料力学性能的影响

易成鸿 谢林生 吉华建 李果 马玉录 王玉

易成鸿, 谢林生, 吉华建, 等. 基于外场作用的SEBS形态演变对PPS基复合材料力学性能的影响[J]. 复合材料学报, 2024, 42(0): 1-12.
引用本文: 易成鸿, 谢林生, 吉华建, 等. 基于外场作用的SEBS形态演变对PPS基复合材料力学性能的影响[J]. 复合材料学报, 2024, 42(0): 1-12.
YI Chenghong, XIE Linsheng, JI Huajian, et al. Impact of the morphological evolution of SEBS based on external field effects on the mechanical properties of PPS composite materials[J]. Acta Materiae Compositae Sinica.
Citation: YI Chenghong, XIE Linsheng, JI Huajian, et al. Impact of the morphological evolution of SEBS based on external field effects on the mechanical properties of PPS composite materials[J]. Acta Materiae Compositae Sinica.

基于外场作用的SEBS形态演变对PPS基复合材料力学性能的影响

详细信息
    通讯作者:

    王 玉,博士,助理研究员,研究方向为过程装备及材料加工 E-mail: wangyu_ecust@ecust.edu.cn

  • 中图分类号: TB332

Impact of the morphological evolution of SEBS based on external field effects on the mechanical properties of PPS composite materials

  • 摘要: 聚苯硫醚(PPS)是一种热塑性工程材料,具有强度高、稳定性好等优点,现已在国防、民用领域得到广泛的应用。然而PPS本身的韧性较差,通常通过添加弹性体进行增韧改性以扩大其应用范围。本研究基于高拉伸混沌流的混炼转子,通过熔融共混法制备了氢化苯乙烯-丁二烯嵌段共聚物/聚苯硫醚(SEBS/PPS)复合材料,研究了不同含量SEBS在高拉伸外场作用下的微观形态演变行为,分析了其对PPS基复合材料力学性能的影响规律。结果表明:随着SEBS含量的增加,PPS基复合材料的冲击强度和断裂伸长率呈现先增加后下降的趋势;当SEBS含量达到6wt%时,复合材料呈现韧性断裂行为,其冲击强度和断裂伸长率达到最高,分别为67.8J/m和6.1%。通过对复合材料微观结构分析发现:在高拉伸混炼转子作用下,当SEBS含量在0~6wt%之间时,SEBS粒径尺寸较小,分布均匀,液滴形态向拉伸棒状演变,此时复合材料发生脆韧转变,韧性明显增强,且在6wt% SEBS含量的复合材料受到冲击力时引发多重银纹,发生剪切屈服,表现为塑性变形;当SEBS含量继续增加时,其团聚行为加剧,粒径尺寸随之逐渐增加,且分布较宽,同时两相界面出现大量空穴区域,在引发银纹发展的同时也会导致复合材料的断裂失效,使得复合材料冲击强度有所下降。

     

  • 图  1  双转子连续混炼挤出机的转子结构

    Figure  1.  Rotor structure of two-rotor continuous mixing extruder

    图  2  不同SEBS含量的氢化苯乙烯-丁二烯嵌段共聚物/聚苯硫醚(SEBS/PPS)复合材料的力学性能:(a) 冲击强度;(b) 断裂伸长率;(c) 拉伸性能;(d) 弯曲性能

    Figure  2.  Mechanical properties of SEBS/PPS composites with different hydrogenated styrene-butadiene-styrene block copolymer/polyphenylene sulfide (SEBS/PPS) contents: (a) Impact strength; (b) Elongation at break; (c) Tensile properties; (d) Bending properties

    图  3  不同SEBS含量的SEBS/PPS复合材料拉伸性能测试时的应力应变曲线及破坏试样图片: (a) 应力应变曲线;(b) 拉伸破坏试样;(c) 冲击破坏试样

    Figure  3.  Stress-strain curves and sample images during tensile performance testing of SEBS/PPS composites with different SEBS contents: (a) Stress-strain curves; (b) Tensile failure samples; (c) Impact failure samples

    图  4  不同SEBS含量的SEBS/PPS复合材料的动态力学性能:(a) 储能模量 (b) 损耗模量(c) 损耗角正切值

    Figure  4.  Dynamic mechanical properties of SEBS/PPS composites with different SEBS contents: (a) Storage modulus (b) Loss modulus (c) Loss angle tangent

    图  5  不同SEBS含量的SEBS/PPS复合材料的SEM照片:SEBS含量:(a) 0 % (b) 3wt% (c) 6wt % (d) 9wt% (e) 15wt% (f) 20wt%

    Figure  5.  SEM photographs of SEBS/PPS composites with different SEBS contents: content of SEBS /wt%: (a) 0 % (b) 3wt% (c) 6wt % (d) 9wt% (e) 15wt% (f) 20wt%

    图  6  不同SEBS含量的SEBS/PPS复合材料的DSC曲线:(a) 熔融曲线 (b) 结晶曲线(1-0wt%SEBS; 2-3wt% SEBS; 3-6wt% SEBS; 4-9wt% SEBS; 5-15wt% SEBS; 6-20wt% SEBS)

    Figure  6.  DSC curves of SEBS/PPS composites with different SEBS contents: (a) Melt curve (b) Crystallization curve (1-0wt%SEBS; 2-3wt% SEBS; 3-6wt% SEBS; 4-9wt% SEBS; 5-15wt% SEBS; 6-20wt% SEBS)

    图  7  不同SEBS含量的SEBS/PPS复合材料冲击断面SEM照片:SEBS含量:(a) 0 % (b) 3wt% (c) 6 wt % (d) 9wt% (e) 15wt% (f) 20wt%

    Figure  7.  SEM images of impact sections of SEBS/PPS composites with different SEBS contents: content of SEBS: (a) 0 % (b) 3wt% (c) 6 wt % (d) 9wt% (e) 15wt% (f) 20wt%

    图  8  不同SEBS含量的SEBS/PPS复合材料的冲击断面TEM照片:SEBS含量:(a) 3wt% (b) 6wt% (c) 20wt%

    Figure  8.  TEM images of impact sections of SEBS/PPS composites with different SEBS contents: content of SEBS:(a) 3wt% (b) 6wt% (c) 20wt%

    图  9  SBES/ PPS的复合材料增韧模型: SEBS含量: (a) 3wt% (b) 6wt% (c) 20wt%

    Figure  9.  Toughening model of composites with SBES/ PPS: content of SEBS: (a) 3wt% (b) 6wt% (c) 20wt%

    表  1  不同SEBS含量的SEBS/PPS复合材料动态力学性能数据

    Table  1.   Data on dynamic mechanical properties of SEBS/PPS composites with different SEBS contents

    Content of SEBS /wt% Storage modulus /MPa Tg1/℃ Tg2/℃ ΔTg
    −50℃ 50℃
    0 2254.2 2131.7 / 124.69 /
    3 2576.6 2382.1 4.38 127.19 122.81
    6 2761.6 2561.2 4.80 125.35 120.55
    9 2465.6 2217.9 4.02 126.12 122.10
    15 2750.31 1921.4 4.14 126.93 122.79
    20 2738.5 1532.4 4.34 126.22 121.98
    Notes:Tg1 is the SEBS glass transition temperature, Tg2 is the PPS glass transition temperature, and ΔTg is the discrepancy between glass transition temperatures.
    下载: 导出CSV

    表  2  不同SEBS含量的SEBS/PPS复合材料DSC热力学参数

    Table  2.   DSC thermodynamic parameters of SEBS/PPS composites with different SEBS contents

    Content of SEBS /wt% Tc/℃ Tm/℃ $\Delta {H_m}$/(J·g−1) Xc/%
    0 236.4 285.3 37.670 34.1
    3 236.3 285.2 36.420 34.0
    6 235.7 285.0 34.871 33.6
    9 235.1 284.8 32.435 33.4
    15 234.6 284.5 30.463 33.3
    20 233.8 283.2 22.597 28.3
    Notes:Tc is the crystallization temperature, Tm is the melting temperature, ΔHm is the enthalpy of melting, and Xc is the degree of crystallinity, calculated according to equation (1).
    下载: 导出CSV
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  • 收稿日期:  2023-12-05
  • 修回日期:  2024-01-07
  • 录用日期:  2024-02-03
  • 网络出版日期:  2024-03-12

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