【摘要】 以对苯二甲酸、间苯二甲酸、间苯二甲酸-5-磺酸钠、二羟甲基丙酸、乙二醇为原料，采用两步酯化法合成了水溶性聚酯（WSPET），以六甲氧基甲基三聚氰胺（HMMM）为交联剂，采用流延法通过溶液交联制备了双向拉伸聚酯（BOPET）/WSPET-HMMM复合膜，表征了交联前后复合膜的结构，研究了HMMM用量对BOPET/WSPETHMMM复合膜耐水煮性能、光学性能及物理性能的影响。结果表明：HMMM对BOPET/WSPET-HMMM复合膜的化学结构有显著影响。随着HMMM用量的增加，复合膜的玻璃化转变温度先升高后降低，热稳定性提高，耐水煮性能先增强后减小，附着力及铅笔硬度逐渐提高，柔韧性降低，光泽度呈降低趋势但变化不大，耐溶剂性能提升。更多还原

【Abstract】 Water-soluble polyester(WSPET) was synthesized via two-step esterification with terephthalic acid,isophthalic acid,sodium phthalic acid-5-sulfonate,dihydroxymethylpropionic acid,and ethylene glycol as raw materials. Then hexamethoxy methyl melamine(HMMM) was used as crosslinking agent to prepare bioxially-oriented polyester(BOPET)/WSPET-HMMM composite membrane by solution crosslinking via tape casting. The chemical structures of the composite membrane before and after cross linking were characterized.The effects of crosslinking agent concentration on the boiling resistance,optical properties and physical properties of BOPET/WSPET-HMMM composite membrane were investigated. The results show that HMMM has an obvious effect on chemical structure of BOPET/WSPET-HMMM composite membrane. With increase of the amount of HMMM,the glass transition temperature of the composite membrane increases and then decreases,its thermal stability is improved,and its boiling resistance is enhanced and then decreased. Meanwhile,the pencil hardness and adhesion of the composite membrane are gradually improved,its flexibility is reduced,its gloss decreases slightly and its solvent resistance is improved.更多还原