Progress on the Physical Mechanisms of Polymer Free Surface Effect

Long-wu Hu; Jian-quan Xu; Feng-liang Wang; Xin-ping Wang

doi:10.11777/j.issn1000-3304.2026.26024

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Progress on the Physical Mechanisms of Polymer Free Surface Effect

更新时间：2026-03-11

- Progress on the Physical Mechanisms of Polymer Free Surface Effect
- Acta Polymerica Sinica Pages: 1-17(2026)
- 作者机构：
  
  浙江理工大学化学系浙江省高分子材料表面与界面科学重点实验室杭州 310018
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2026.26024
  CLC：
- CSTR：32057.14.GFZXB.2026.7576
- Received：29 January 2026，
  
  Accepted：04 March 2026，
  
  Online First：11 March 2026，
- 稿件说明：
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胡龙午, 徐健荃, 王风亮, 王新平. 聚合物自由表面效应物理机制的研究进展. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26024.

Hu, L. W.; Xu, J. Q.; Wang, F. L.; Wang, X. P. Progress on the physical mechanisms of polymer free surface effect. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26024.
胡龙午, 徐健荃, 王风亮, 王新平. 聚合物自由表面效应物理机制的研究进展. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26024. DOI： CSTR： 32057.14.GFZXB.2026.7576.

Hu, L. W.; Xu, J. Q.; Wang, F. L.; Wang, X. P. Progress on the physical mechanisms of polymer free surface effect. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26024. DOI： CSTR： 32057.14.GFZXB.2026.7576.

摘要

当材料尺寸减小至纳米尺度时，聚合物的物理性质(如玻璃化转变、扩散、结晶、流变及力学行为)会显著偏离本体状态，表现出明显的尺寸依赖性. 聚合物自由表面效应，即聚合物在空气(或真空)界面处分子链运动能力增强，进而影响其整体分子运动与宏观物理性能的现象，被认为是产生这种尺寸依赖性的重要因素. 本文系统综述了聚合物自由表面效应的研究进展，总结了自由表面效应的物理起源，介绍了自由表面效应的长程传递特征，讨论了聚合物结构以及聚合物/基底界面效应对自由表面效应产生影响的微观机制，并对该领域的未来研究方向与潜在应用进行了展望.

Abstract

It has shown that when the size of polymer materials is reduced to the nanoscale

the physical properties of polymers (

e.g.

glass transition temperature

diffusion

crystallization

rheological and mechanical behaviors) deviate substantially from their bulk counterparts

showing a pronounced size dependence. The free surface effect of polymers

which is the phenomenon of the chain mobility at the polymer/air (or vacuum) interface is enhanced

then further influencing the overall chain dynamics and physical properties of the polymer materials

is regarded as a key factor contributing to such size dependence. In this paper

we systematically reviewed the progress on the free surface

effect of polymers

summarized the physical origins of the free surface effect

introduced its long-range propagation feature

discussed the microscopic mechanisms by which polymer structures and polymer/substrate interfacial effect influence the free surface effect

and prospected the future directions and potential applications in this field.

关键词

Keywords

references

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