4-溴代巴豆酸甲酯改性丁基橡胶的硫化特性及物理机械性能

以氢化钠（Na H）为活性剂,在Haake转矩流变仪中用4-溴代巴豆酸甲酯（MBC）改性丁基橡胶（IIR）制得产物MBCIIR,采用傅里叶变换红外光谱与核磁共振氢谱表征了产物,并考察了MBC用量、反应温度、改性时间及终止剂品种对MBCIIR硫化特性及物理机械性能的影响。结果表明,经过MBC改性,在IIR分子链上同时引入了溴原子、羟基和不饱和双键官能团;MBC用量少于Na H有利于MBCIIR硫化反应的发生,而MBC用量大大超过Na H可抑制MBCIIR的硫化反应,且MBCIIR的拉伸强度和撕裂强度降低;反应温度对MBCIIR硫化反应和拉伸强度的影响不大,但提高反应温度有利于撕裂强度的增大;当改...

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Bibliographic Details
Published in合成橡胶工业 Vol. 39; no. 3; pp. 187 - 191
Main Author 苏俊杰 于方琪 刘冉 赵季若 冯莺
Format Journal Article
LanguageChinese
Published 青岛科技大学橡塑材料与工程教育部重点实验室/山东省橡塑材料与工程重点实验室,山东青岛,266042 2016
Subjects
4-溴代巴豆酸甲酯
丁基橡胶
改性
氢化钠
物理机械性能
硫化特性
sodium hydride
改性
丁基橡胶
4-溴代巴豆酸甲酯
butyl rubber
物理机械性能
metyl 4-bromocrotonate
硫化特性
curing characteristics
mechanical property
氢化钠
modification
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ISSN1000-1255

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Summary:以氢化钠（Na H）为活性剂,在Haake转矩流变仪中用4-溴代巴豆酸甲酯（MBC）改性丁基橡胶（IIR）制得产物MBCIIR,采用傅里叶变换红外光谱与核磁共振氢谱表征了产物,并考察了MBC用量、反应温度、改性时间及终止剂品种对MBCIIR硫化特性及物理机械性能的影响。结果表明,经过MBC改性,在IIR分子链上同时引入了溴原子、羟基和不饱和双键官能团;MBC用量少于Na H有利于MBCIIR硫化反应的发生,而MBC用量大大超过Na H可抑制MBCIIR的硫化反应,且MBCIIR的拉伸强度和撕裂强度降低;反应温度对MBCIIR硫化反应和拉伸强度的影响不大,但提高反应温度有利于撕裂强度的增大;当改性时间较短时,MBCIIR的正硫化时间及物理机械性能基本都与IIR相近,而继续延长改性时间对MBCIIR的硫化特性影响不大;终止剂的加入可改善MBCIIR的硫化特性,其中,天然橡胶效果最佳,且MBCIIR的拉伸强度和撕裂强度均大于未加入终止剂的MBCIIR。
Bibliography:metyl 4-bromocrotonate; sodium hy-dride ; butyl rubber ; modification ; curing character-istics; mechanical property
62-1036/TQ
Butyl rubber（IIR） was modified with methyl 4-bromocrotonate （ MBC ） in a Haake torque rheometer using sodium hydride （NAH） as active agent, the product MBCIIR was characterized by Fourier transform infrared spectroscopy and nuclear magnetic hydrogen spectrum, and the effects of MBC amount, reaction temperature, modification time and termination agent on curing characteristics and mechanical properties of MBCIIR were investi- gated. The results showed that after modification, the bromine atom, hydroxyl group and unsaturated double bond were introduced into the molecular chain of IIR. When amount of MBC was less than that of Nail, the vulcanization of MBCIIR was pro- moted, on the contrary, when amount of MBC was more than that of NAH greatly, the vulcanization was inhibited and the tensile strength and tearstrength of vulcanizates decreased. The effect of re- action temperature on the v
ISSN:1000-1255