Study on polyisocyanate crosslinked polyvinyl alcohol wood adhesive
The orthogonal experimental method(controlling five levels and six factors)was used to investigate the effect of the addition amount of nonionic surfactant OP-10,catalyst stannous octanoate,crosslinking agent JQ-4,the reaction time,the reaction temperature and the mass of relative volume of polyvinyl alcohol on the shear strength of modified polyvinyl alcohol wood adhesive by using polyvinyl alcohol solution as the matrix.The research results showed that,(1)All six factors selected in the orthogonal experiment had an effect on the shear strength of the adhesive,with the mass of relative volume of polyvinyl alcohol solution having the greatest effect.According to the range analysis,the order of factors affecting the adhesive curing was as follows:mass of relative volume of PVA solution＞OP-10 addition＞JQ-4 addition＞stannous octanoate addition＞reaction time＞reaction temperature.(2)The adhesive sample generally showed a homogeneous milky white color,and the color stability of all samples was good.The adhesive had good stability,was not easy to deteriorate,freeze-resistant,easy to store,and the fluidity was generally superior.(3)The relative optimal synthesis conditions for the adhesive sample were:PVA addition of 8 g/100 mL,OP-10 addition of 0.1 mL/100 mL,JQ-4 addition of 0.3 mL/100 mL,catalyst addition of 0.3 mL/100 mL,reaction time of 75 minutes,and reaction temperature of 60 ℃.The prepared emulsion was stable milky white with excellent performance.It could be used as adhesive in the construction industry and was more environmentally friendly.
万方数据
维普
