Abstract: Reactive liquefied rice husk polyols comes from the liquefaction of rice husk in oligomer polyols and we can synthesize polyurethane adhesive (PU) from liquefied rice husk polyols by reacting it with oligomer polyols,4,4-diphenyl methane diisocyanate (MDI) and small molecule cross-linking agent. In the synthesis of the PU,the pre-polymerization temperature,the amount of liquefied rice husk polyols,the species of oligomer polyols,R value (molar ratio of -NCO and -OH) and the type of small molecule cross-linking agent were investigated. The PU was analyzed by IR,viscosity and mechanical properties,and the results showed that when the pre-polymerization temperature was 70℃,polybutylene adipate 1000(PBA1000) was the raw materials,the amount of liquefied rice husk polyols was 10%,R value was 1.2 and the cross-linking agent was trimethylolpropane(TMP),we can obtain PU adhesive with excellent performance.

Key words: liquefied rice husk polyols, polyurethane adhesive, viscosity, mechanical properties

摘要： 将稻壳在多元醇中液化制备具有反应活性的稻壳基多元醇,然后以所制备的稻壳基多元醇、低聚物多元醇、二苯基甲烷二异氰酸酯(MDI)和小分子交联剂等为主要原料合成聚氨酯(PU)乳液。分别从预聚反应温度、稻壳基多元醇的添加量、低聚物多元醇种类、R值(-NCO与-OH的摩尔比)以及小分子交联剂种类5个方面进行研究。通过对所制备的聚氨酯乳液进行红外光谱、黏度、稳定性和力学性能等分析测试,结果表明:在预聚反应温度为70℃、聚己二酸丁二醇酯1000(PBA1000)为原料、稻壳基多元醇添加量为10%、R值为1.2、三羟甲基丙烷(TMP)为交联剂的条件下,合成的PU胶黏剂效果最佳。

关键词: 稻壳基多元醇, 聚氨酯胶黏剂, 黏度, 力学性能