Viscosity of Blend Films of Linear and Ring Polystyrenes

Li-na Wang; Huan-huan Zhang; Lin Xu; Bin-yuan Liu; Tong-fei Shi; Shi-chun Jiang; Li-jia An

doi:10.11777/j.issn1000-3304.2017.17315

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Viscosity of Blend Films of Linear and Ring Polystyrenes

Research Article | 更新时间：2021-01-26

- Viscosity of Blend Films of Linear and Ring Polystyrenes
- Acta Polymerica Sinica Issue 6, Pages: 741-747(2018)
- 作者机构：
  
  1.天津大学材料科学与工程学院　天津 300072
  2.中国科学院长春应用化学研究所　高分子物理与化学国家重点实验室　长春 130022
  3.贵州师范学院表面物理与化学实验室　贵阳 550018
  4.河北工业大学化工学院　天津 300401
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2017.17315
  CLC：
- Published：2018-6，
  
  Received：14 November 2017，
  
  Revised：9 December 2017，
扫描看全文
Li-na Wang, Huan-huan Zhang, Lin Xu, Bin-yuan Liu, Tong-fei Shi, Shi-chun Jiang, Li-jia An. Viscosity of Blend Films of Linear and Ring Polystyrenes. [J]. Acta Polymerica Sinica (6):741-747(2018)
DOI：

Li-na Wang, Huan-huan Zhang, Lin Xu, Bin-yuan Liu, Tong-fei Shi, Shi-chun Jiang, Li-jia An. Viscosity of Blend Films of Linear and Ring Polystyrenes. [J]. Acta Polymerica Sinica (6):741-747(2018) DOI： 10.11777/j.issn1000-3304.2017.17315.

摘要

研究了线形聚苯乙烯(LPS)薄膜，环形聚苯乙烯(RPS)薄膜以及不同配比的共混薄膜在聚二甲基硅氧烷(PDMS)高分子刷上的去润湿动力学行为. 研究发现，LPS薄膜的去润湿速度要快于RPS薄膜的去润湿速度，共混薄膜的去润湿速度介于LPS薄膜和RPS薄膜之间，且共混薄膜的去润湿速度随着RPS在共混薄膜中含量的增加而降低. 利用水和乙二醇在薄膜表面的接触角计算得到LPS薄膜，RPS薄膜及共混薄膜的表面张力. 结果发现，共混薄膜的表面张力均小于LPS薄膜和RPS薄膜的表面张力，且当RPS含量为70% 时，共混薄膜的表面张力达到最小值. 通过对薄膜在去润湿过程中的孔半径、去润湿速度、边宽以及后退接触角的研究，获得了LPS薄膜、RPS薄膜及共混薄膜的黏度. 结果表明，LPS薄膜的黏度要低于RPS薄膜的黏度，实验得到的不同比例共混薄膜的黏度介于LPS薄膜和RPS薄膜的黏度之间，且其低于LPS和RPS的质量权重平均值.

Abstract

Dewetting behaviors on PDMS substrate of linear polystyrene (LPS) film

ring polystyrene (RPS) film and the blended films with different mixing ratios are investigated. The radii of the holes exhibit exponential growth with time for the above mentioned types of films. The dewetting velocity of RPS film appears slower than that of LPS film

and the velocity of the blended films falls in between the above two. Moreover

the velocity of the blended films decreases with increasing RPS fraction. The surface energies of the films are calculated from the contact angles of two different liquids (water and ethylene glycol) on top of the corresponding films. Results show that the surface energies of the blended films are smaller than those of LPS film and RPS film. The surface energy reaches the lowest value for the blended film with 70% of RPS

which may be caused by the different roughness measurements for LPS film

RPS film and the blended films. The viscosities of these films are obtained through the radii of the dewetting holes

the dewetting velocities

the widths of the rims and the receding contact angles along dewetting process. Results show LPS film has a lower viscosity than RPS film. The viscosities of the blended films fall in between those of LPS film and RPS film

and increase with increasing RPS concentration. Moreover

the experimental viscosities of the blended films present lower values than those calculated from the pure-component viscosity using a binary mixing rule. The ratio of the experimental viscosity to the calculated viscosity reaches a lowest value with 70% of RPS. This may be attributed to the efficient packing ability of the ring chains

the effect of chain threading and the amount of free volume in the film.

关键词

高分子薄膜环形聚苯乙烯共混去润湿黏度

Keywords

Thin polymer filmRing polystyreneBlend filmDewettingViscosity

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