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Licensed Unlicensed Requires Authentication Published by De Gruyter April 27, 2022

Influence of surface modification on thermal, adhesive properties and impact behavior of TPU films for laminated glass

Chenxing Zhang, Hongwu Wu, Liangfeng Xu and Mingyuan Ren

Abstract

The poor adhesion of TPU films limits their extensive application in lightweight laminated glass (LLG). A simple and effective method is reported in this paper to obtain modified TPU films by silane coupling agent (SCA) treatment. The polar groups (such as urethane groups, carboxyl groups, etc.) on the surface of TPU films reacted chemically with the reactive groups of SCA. Meanwhile, hydrogen bonds were formed between the silicon hydroxyl groups generated by the hydrolysis of SCA. Therefore, the adhesivity and thermal stability of TPU films were improved. Moreover, the surface of TPU films became rough after modification, hence the interfacial bonding area between TPU film and glass increased, which furthered the bonding effect of TPU film with glass plate. Compared with unmodified TPU films, the tensile shear bond strength (TSBS) of modified TPU films increased by nearly 28%, and the initial decomposition temperature increased from 277 °C to a maximum of 295.3 °C. The impact resistance of LLG was significantly improved due to the improvement of the adhesivity of TPU film.


Corresponding author: Hongwu Wu, Key Laboratory of Polymer Processing Engineering, South China University of Technology, Ministry of Education, Guangzhou, P. R. China; National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou, P. R. China; and Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing, South China University of Technology, Guangzhou, P. R. China, E-mail:

Acknowledgments

We acknowledge the support of this work by the National Key Research and Development Program ofChina (grant no. 2016YFB0302302), the Natural Science Foundations of China (51573213, 51303215).

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2021-12-24
Accepted: 2022-03-12
Published Online: 2022-04-27
Published in Print: 2022-07-26

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