有机蒙脱土纳米复合材料对聚氨酯弹性体耐热碱水性能的改善  

Improvement of OMMT Nanocomposites on Hot Alkaline Water Resistance of Elastomeric Polyurethane

作　　者：张淑坤 

机构地区：[1]山西省化工研究院,山西太原030021

出　　处：《塑料工业》2010年第5期78-81,共4页China Plastics Industry

摘　　要：采用有机插层蒙脱土(PU-C5)和分散剂分别对四氢呋喃均聚醚(PTMG)/2,4-甲苯二异氰酸酯(TDI)/3,3-二氯-4,4—二氨基二苯基甲烷(MOCA)和PTMG/4,4′-二苯甲烷二异氰酸酯(MDI)/1,4-丁二醇(BDO)两种体系的浇注聚氨酯弹性体进行纳米改性。改性后的弹性材料浸泡90℃含碱热水(pH=8.5)中老化试验一个月。实验结果表明,加入分散剂的PTMG/MDI/PU-C5/BDO体系纳米复合材料的耐热水性能最佳,拉伸强度和撕裂强度保持率分别为57.52%和82.38%。经动态力学试验(DMA)表明,PTMG/MDI/PU-C5/ME60纳米复合材料的储存模量(E′)和损耗模量(E″)明显增加。Polytetramethylene ether glycol（PTMG）/2,4-toluene diisocyanate（TDI）/3,3-dichloro-4,4-diamino diphenyl methane（MOCA）,and PTMG/4,4′-diphenyl methane diisocyanate（MDI）/1,4-butanediol（BDO）systems were modified by organic montmorillonite（PU-C5）and dispersion agent respectively.The modified polyuethane elastomer was immersed by aging experiment in 90 ℃ hot water（pH=8.5）with alkali.The result showed that the water resistance of PTMG/MDI/PU-C5/BDO with dispersion agent was the best.After aging for 30 days,the retention of tear strength was 82.38 %,and tensile strength was 57.52%.the dynamic mechanical test（DMA）result showed that the storage modulus E′and loss modulus E″ of PTMG/MDI/PU-C5/ME60 nanocomposites were increased significantly.

关 键 词：聚氨酯 蒙脱土 纳米复合材料 四氢呋喃均聚醚 耐水性能 

分 类 号：TQ334.1[化学工程—橡胶工业]