为开发环境友好型木材胶黏剂,利用差示扫描量热法(DSC)和流变仪分析了葡甘聚糖、壳聚糖、聚乙烯醇共混胶黏剂的热同化过程和流变特性.结果表明:三元共混胶黏剂的流变特性呈明显的非线性,黏度与剪切速率的关系可用Cross模型拟合,黏度与温度的关系可用Arrhenius方程拟合,前置因子K为1.25×10-6Pa·s,流动活化能为54.24 kJ/mol,频率曲线可用四阶多项式拟合,同时可得到胶黏剂的平均分子量随温度升高逐渐降低,分子量分布随着温度升高逐渐增大.温度和时间扫描得到凝胶化温度110.4℃,凝胶时间20.1 min,玻璃化转变温度87.4℃,加热温度130℃.
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