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文摘
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以甲基三乙氧基硅烷为反应物,在盐酸催化下水解缩合,合成无色透明粘稠的液体有机硅氧烷预聚体,IR和1H NMR表征证实其为目的产物;当有机硅氧烷预聚体与工业乙醇的体积比为1∶1,以质量分数0.60%的NaOH-CH3OH溶液为固化剂,加入该溶液0.05 mL,在30℃,预聚体交联固化时间为9 min;在50℃,预聚体交联固化时间为4 min;首次将有机硅氧烷预聚体,或它与聚乙烯醇(PVA20-88)的混合物用作化学固沙剂,形成的固结层具有较好的耐水性和较高的抗剪强度;当PVA20-88与有机硅氧烷预聚体的质量比为1∶4时,粘聚力达到483.7kPa,内摩擦角为68.39°,在160 h的紫外光照射下,具有很好的耐老化性。 |
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其他语种文摘
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Organosilixane prepolymer derived from methyltriethoxylsilane was synthesized,and characterized by IR and 1H NMR.The hydrolysis and condensation of the methyltriethoxylsilane were carried out in the presence of a catalytic amount of hydrochloric acid.Using 0.60% NaOH-CH3OH solution as curing agent,the curing performance of the prepolymer at various temperature was investigated.The curing time was 9 min at 30 ℃,and 4 min at 50 ℃,when 0.05 mL 0.60%NaOH-CH3OH was added to prepolymer-industrial ethanol solution with the volume ratio of the prepolymer to industrial ethanol at 1∶1.The mixture of organosilixane prepolymer and polyvinyl alcohol(PVA)was used as chemical sand-fixing material for the first time.The crust,which was formed by using this material,had good water resistance,ageing resistance(under 16 h ultraviolet irradiation),and shear strength value.The cohesion value was 483.7 kPa,and the angle of internal friction was 68.39°,when the mass ratio of polyvinyl ethanol to organosilixane prepolymer was 1∶4. |
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来源
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应用化学
,2011,28(7):753-758 【核心库】
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关键词
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甲基三乙氧基硅烷
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有机硅氧烷预聚体
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聚乙烯醇
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室温固化
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化学固沙剂
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地址
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中国科学院兰州化学物理研究所, 羰基合成与选择氧化国家重点实验室, 兰州, 730000
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-0518 |
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学科
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化学 |
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基金
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甘肃省科技支撑计划项目
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中国科学院西部之光人才培养计划
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文献收藏号
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CSCD:4249203
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