Abstract
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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