室温自交联水性含氟聚氨酯-聚丙烯酸酯复合乳液的制备

Study on the preparation and properties of room temperature self-crosslinking Waterborne fluorinated polyurethane-acrylate

摘要:

采用原位无皂乳液聚合工艺，以丙烯酸单体为溶剂，双丙酮丙烯酰胺（DAAM)和己二酰肼（ADH)为交联体系得到室温自交联水性含氟聚氨酯-聚丙烯酸酯（WFPUA)。通过红外光谱（FT-IR)、透射电镜（TEM)和原子力显微镜（AFM)对聚合物结构进行了表征。同时，研究了含氟量，酮肼交联比例对WFPUA胶膜的性能影响。结果显示，当含氟量为8%、酮肼摩尔比为1：1时，接触角能达到110.5?，吸水率下降至8.8%，抗拉强度从18.12MPa提高至28.55MPa。热重分析表明，酮肼交联的引入有效提高了乳胶膜的热稳定性。

Abstract:

The room temperature self-crosslinking emulsions of waterborne fluorinated polyurethane- acrylate(WFPUA)were synthesized using in-situ surfactant-free emulsion爌olymerization爓ith acrylic monomers as the solvent, and the diacetone acrylamide(DAAM) and adipic dihydrazide(ADH) were introduced into the WFPUA emulsions for the cross-linking system. The structure and the physical properties of the WFPUA were investigated by FT-IR, TEM and AFM. Meanwhile, the fluorine content and the impact of the ratio of DAAM and ADH were studied. The results show that，when the fluorine content reached 8%，DAAM:ADH=1:1, the static water angle would reach 110.5?water absorption also are reduced to 8.8%. tensile stress are increased from 18.12MPa to 28.55MPa. Moreover, the results of TG spectra show that the cross-linking system of DAAM and ADH help to improve the thermal stability of the latex film.