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Citation: Wang Lianzhi, Han Xiaozu, Peng Hui, Yang Zhen, Zhao Guoqin, Zhang Qingyu. ON THE INFLUENCE OF FUNCTIONALITY OF HTBN ON THE CURING PROCESS AND THE PROPERTIES OF CURED RUBBER[J]. Chinese Journal of Applied Chemistry, ;2016, 4(5): 31-34. shu

ON THE INFLUENCE OF FUNCTIONALITY OF HTBN ON THE CURING PROCESS AND THE PROPERTIES OF CURED RUBBER

1.
Changchun Institute of Applied Chemistry, Academia Sinica

Corresponding author: Wang Lianzhi,
Received Date: 21 March 1986
Available Online: 10 September 1986
Fund Project:

Hydroxy-terminated butadiene-acrylonitryle copolymer (HTBN) was synthesized by using H₂O₂ as initiator. Four samples of HTBN with, f_n=1.94, 2.32,2.64 and 3.02, respectively, were prepared by adding HOCH₂CH₂SH or 2-hydroxyethyl acrylate during polymerization. Isophorone diisocyanate (IPDI) was used as curing agent and N,N'-bis(hydroxypropyl) aniline (Isonol C-100)as chain extender.The results showed that the curing rate is dependent on f_n, the higher the f_n, the faster the rate. The crosslinking density of the cured rubber increascs with increasing f_n, showing influence on the properties of the rubber. The tensile strength and hardness increase with increasing f_n, with the elongation being decreased.HTBN elastomer with f_n=1.93 is found to be a promising damping material due to the constant tanδ over a wide temperature range. Two transition temperatures were observed for all HTBN rubbers studied. Increase off f_n is of benefit to the oil- and heat resistance of the cured rubber.
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