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橡塑技术与装备 CHINA RUBBER/PLASTICS TECHNOLOGY AND EQUIPMENT

参考文献 ： properties[J]. Macromolecular rapid communications, 2003,
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organoclay nanocomposite: preparation, characterization and

Influence of cross-linking bond types on tensile stress of mixed
polyurethane rubber

Du Wei, Deng Tao *
(Qingdao University of Science & Technology, Qingdao 266042, Shandong, China)
Abstract: The effects of different types of cross-linking bonds formed under different types of vulcanization
systems on the tensile stress of mixed polyurethane rubber (MPU) were investigated experimentally. In the
experiment, MPU vulcanizates with different cross-linked structures were obtained by designing different
vulcanization systems, including high-sulfur and low-acceleration, ordinary sulfur, low-sulfur and high-
acceleration, and peroxide vulcanization systems. With the increase of the ratio of accelerator and sulfur, the
utilization rate of sulfur and the crosslinking efficiency gradually increased, and the main crosslinking structure
in the vulcanizate also changed from polysulfide bond to monosulfide bond. The linear relationship of crosslink
density to tensile stress was investigated experimentally for each vulcanization system. Through the lateral
comparison of the four groups of vulcanization systems, it is found that the magnitude of the cross-linking
bond energy has a positive correlation with the slope K value in the linear model.
Key words: mixed polyurethane rubber (MPU); cross-linking bond type; cross-linking density; tensile stress;
linear relationship
（R-03）

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