Multiscale Relaxation Behavior of Amorphous Plasticized Poly(vinyl butyral)

Changzhu Lv; Hang Guo; Erjie Yang; Chunlei Xu; Qi Yan; Lingpu Meng; Liangbin Li; Kunpeng Cui

doi:10.1002/marc.202300226

Multiscale Relaxation Behavior of Amorphous Plasticized Poly(vinyl butyral)

Macromol Rapid Commun. 2023 Sep;44(18):e2300226. doi: 10.1002/marc.202300226. Epub 2023 Jun 29.

Authors

Changzhu Lv^{1

2}, Hang Guo^{1

2}, Erjie Yang^{1

2}, Chunlei Xu^{1

2}, Qi Yan^{1

2}, Lingpu Meng^{1

2}, Liangbin Li^{1

2

3}, Kunpeng Cui^{2

3

4}

Affiliations

¹ National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230026, China.
² Anhui Provincial Engineering Laboratory of Advanced Functional Polymer Film, University of Science and Technology of China, Hefei, 230026, China.
³ CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei, 230026, China.
⁴ Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, 230026, China.

PMID: 37340957
DOI: 10.1002/marc.202300226

Abstract

As a key component in laminated glass, plasticized polyvinyl butyral (PVB) interlayer is a kind of impact-resistant polymer material with high toughness. Recently, by using ultrasmall angle X-ray scattering (USAXS) technique, Stretch-induced phase-separated structure on the scale of hundreds of nanometers formed in plasticized PVB for the first time is reported. In this work, the multiscale relaxation behavior of plasticized PVB is further investigated. The relaxation behavior of deformed plasticized PVB is studied from macroscopic stress, mesoscopic phase-separated structure, and microscopic chain segment by combining USAXS, and birefringence with in situ stretching device. The contributions of chain segments and hydrogen bonding clusters for the multiscale relaxation behavior are discussed.

Keywords: multiscale relaxation; poly(vinyl butyral); stretch-induced phase separation; ultrasmall-angle X-ray scattering.

Multiscale Relaxation Behavior of Amorphous Plasticized Poly(vinyl butyral)

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