Pyridine terminated polyurethane dendrimer/chlorinated butyl rubber nanocomposites with excellent mechanical and damping properties

Jiacheng Chen; Jincheng Wang; Shuhong Li; Kailing Xiang; Shiqiang Song

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Pyridine terminated polyurethane dendrimer/chlorinated butyl rubber nanocomposites with excellent mechanical and damping properties

Full Length Article | Updated：2026-01-06

- Pyridine terminated polyurethane dendrimer/chlorinated butyl rubber nanocomposites with excellent mechanical and damping properties
- Chinese Journal of Chemical Engineering Vol. 53, Issue 1, Pages: 211-221(2023)
- Affiliations：
  
  College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science,Shanghai,China,201620
- Author bio：
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- DOI：
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- Published：2023
- Accepted：
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Jiacheng Chen, Jincheng Wang, Shuhong Li, Kailing Xiang, Shiqiang Song. Pyridine terminated polyurethane dendrimer/chlorinated butyl rubber nanocomposites with excellent mechanical and damping properties[J]. Chinese Journal of Chemical Engineering, 2023, 53(1): 211-221.
DOI：

Jiacheng Chen, Jincheng Wang, Shuhong Li, Kailing Xiang, Shiqiang Song. Pyridine terminated polyurethane dendrimer/chlorinated butyl rubber nanocomposites with excellent mechanical and damping properties[J]. Chinese Journal of Chemical Engineering, 2023, 53(1): 211-221. DOI：

摘要

Abstract

Due to the special viscoelastic property

traditional rubber with high performance has been widely used in human life and production. However

it is challenging to improve the damping property without sacrificing the extensibility. In this work

a novel type of second-generation polyurethane dendrimer terminated with pyridine (G2-Py) was synthesized by using thiolactone chemistry and subsequently complexed with Zn ions. The structure and morphology of G2-Py were characterized. G2-Py-Zn

was then mixed with chlorinated butyl rubber (CIIR) by a two-roll mill. A series of CIIR/G2-Py-Zn

elastomers were obtained through vulcanization. CIIR/G2-Py-Zn

elastomers could achieve high stretchability (a strain of ~1035%)

high mechanical strength (a tensile stress of 7.64 MPa). This was benefitted from the friction between G2-Py and CIIR as well as variety of non-covalent bonds provided by G2-Py-Zn

which can dissipate energy to further improve the strength and extensibility. The coordination of Zn

-pyridine was confirmed by Fourier transform infrared spectroscopy

stress relaxation and cycle tensile test. To further investigate the morph

ology and damping properties of the elastomers

scanning electron microscopy and dynamic mechanical analysis were performed. CIIR-5 showed the best damping performance with higher tan

max

and wider effective damping temperatures. Therefore

this dendrimer modification technology provides wider applications for CIIR elastomers in daily life.

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