Studies on Morphology Control of Polystyrene/Polyphenylene Ether/ Polypropylene Blends and Their Supercritical CO<sub>2</sub> Foaming Performance

Jia Zeng; Jia-huan He; Li-wei Qi; Huan-huan Liu; Jia-jun Wu; Min Zhu; Zhong-bin Ni; Dong-jian Shi; Ming-qing Chen

doi:10.11777/j.issn1000-3304.2026.25307

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Studies on Morphology Control of Polystyrene/Polyphenylene Ether/ Polypropylene Blends and Their Supercritical CO₂ Foaming Performance

更新时间：2026-03-24

- Studies on Morphology Control of Polystyrene/Polyphenylene Ether/ Polypropylene Blends and Their Supercritical CO₂ Foaming Performance
- Acta Polymerica Sinica Pages: 1-9(2026)
- 作者机构：
  
  1.江南大学化学与材料工程学院无锡 214122
  2.无锡会通轻质材料股份有限公司无锡 214101
- 作者简介：
  
  Ming-qing Chen, E-mail: mqchen@jiangnan.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2026.25307
  CLC：
- CSTR：32057.14.GFZXB.2026.7559
- Received：22 November 2025，
  
  Accepted：26 January 2026，
  
  Online First：24 March 2026，
- 稿件说明：
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曾佳, 何家欢, 齐力伟, 刘缓缓, 吴加俊, 朱民, 倪忠斌, 施冬健, 陈明清. 聚苯乙烯/聚苯醚/聚丙烯共混物的形态调控及其超临界CO₂发泡性能研究. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.25307.

Zeng, J.; He, J. H.; Qi, L. W.; Liu, H. H.; Wu, J. J.; Zhu, M.; Ni, Z. B.; Shi, D. J.; Chen, M. Q. Studies on morphology control of polystyrene/polyphenylene ether/polypropylene blends and their supercritical CO₂ foaming performance. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.25307.
曾佳, 何家欢, 齐力伟, 刘缓缓, 吴加俊, 朱民, 倪忠斌, 施冬健, 陈明清. 聚苯乙烯/聚苯醚/聚丙烯共混物的形态调控及其超临界CO₂发泡性能研究. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.25307. DOI： CSTR： 32057.14.GFZXB.2026.7559.

Zeng, J.; He, J. H.; Qi, L. W.; Liu, H. H.; Wu, J. J.; Zhu, M.; Ni, Z. B.; Shi, D. J.; Chen, M. Q. Studies on morphology control of polystyrene/polyphenylene ether/polypropylene blends and their supercritical CO₂ foaming performance. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.25307. DOI： CSTR： 32057.14.GFZXB.2026.7559.

摘要

在国家双碳与轻量化战略推动下，聚苯乙烯/聚苯醚(PS/PPO)共混体系因其轻质和高性能特性成为发泡材料研究热点，但由于PS/PPO分子链刚性强，在发泡过程中熔体黏度大、流动性差，导致发泡剂在PS/PPO熔体中难以均匀分散，影响发泡效果. 本工作通过熔融共混法在PS/PPO中引入聚丙烯(PP)，研究了不同PP含量下，PP在PS/PPO共混材料中的分布情况及共混体系流变性能，并结合超临界CO

釜式发泡技术，对PS/PPO/PP共混材料进行发泡. 通过扫描电镜观察了发泡颗粒内部的泡孔结构、泡孔密度及发泡倍率. 流变测试结果表明，PP加入基体后，改变了基体低频时的储能模量和复数黏度. 同时不同含量的PP在基体中的分散结构显著影响了PS/PPO共混材料中PP的结晶状态及发泡效果. 当PP用量为15%时，泡孔孔径最小为38 μm，泡孔密度最高为3.6×10

个/cm

，发泡倍率达7.6倍. 本工作构建的柔性-刚性两相复合结构提升了材料的发泡稳定性，为高性能工程塑料发泡提供了新途径.

Abstract

With the development of the national dual-carbon and lightweight strategy

polystyrene/polypropylene (PS/PPO) blend systems have become a research hotspot for foamed materials owing to their lightweight and high performance. However

owing to the strong rigidity of the PS/PPO molecular chains

PS/PPO has a high melt viscosity and poor fluidity during the foaming process

making it difficult to disperse the foaming agent uniformly in the PS/PPO melt

which affects the foaming effect. To address these problems and the challenges

of single-phase foaming of high-performance engineering plastics

a phase design for co-mingled foaming systems was employed. This approach optimizes the cell structure from a single phase to a composite structure of flexible and rigid immiscible phases

thereby enhancing the foaming performance of the material. Polystyrene/polyphenylene ether/polypropylene (PS/PPO/PP) blends were prepared using a melt blending method

and the distribution and rheological properties of PP in PS/PPO blends with different PP contents were studied. Using supercritical CO

as the foaming agent

the PS/PPO/PP blend was foamed by batch kettle foaming

and the cell structure

cell density

and foaming rate of the foamed particles were observed using scanning electron microscopy. The results show that the storage modulus and complex viscosity of the substrate at low frequencies changed when PP was added to the matrix. Simultaneously

the dispersion structure of PP with different contents in the matrix significantly affected the crystallization state and foaming effect of the PP/PPO blend and improved the foaming performance of the PS/PPO blend. When the amount of PP was 15%

the minimum pore size was 38 μm

the highest cell density was 3.6×10

cells/cm

and the foaming ratio was 7.6 times. This study constructs a flexible-rigid two-phase composite to enhance the foaming stability of the material

providing a new approach for foaming high-performance engineering plastics.

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Keywords

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Studies on Morphology Control of Polystyrene/Polyphenylene Ether/ Polypropylene Blends and Their Supercritical CO2 Foaming Performance

DOI：10.11777/j.issn1000-3304.2026.25307

摘要

Abstract

关键词

Keywords

references

Studies on Morphology Control of Polystyrene/Polyphenylene Ether/ Polypropylene Blends and Their Supercritical CO₂ Foaming Performance