摘要
以聚己二酸己二醇酯二元醇(PHA)、聚己二酸丁二醇酯二元醇(PBA)、异氟尔酮二异氰酸酯(IPDI)、二羟甲基丁酸(DMBA)为单体,三羟甲基丙烷(TMP)为交联剂,乙二胺(EDA)为后扩链剂制备出一系列内交联型水性聚氨酯自消光树脂乳液(PUX膜),进一步将其制备成内交联水性聚氨酯自消光胶膜(PUF)。利用傅里叶红外光谱仪(FTIR)对乳液结构进行了表征,采用扫描电镜(SEM)和透射电镜(TEM)观察乳液表面和粒子形貌,并对PUF的光泽度、耐水和耐酸碱性、热力学等性能进行了检测。结果表明:胶膜表面粗糙,自消光树脂乳液平均粒径在1 000 nm以上,光泽度2.0左右,符合消光要求;胶膜在未添加交联剂时的拉伸强度为8.3 MPa,玻璃化转变温度为-45℃,热失重10%时的分解温度为275.7℃,在去离子水、酸和碱溶液中的吸水率分别为29.1%、27.0%和17.2%;交联剂的加入量为0.65%(以单体的总质量计,下同)时,乳胶膜的拉伸强度增大到21.4 MPa,玻璃化转变温度升高到-40℃,热失重10%时的分解温度升高到305.6℃,在去离子水和酸、碱溶液中的吸水率降低为3.2%、6.2%和5.0%。
A series of internal crosslinking waterborne polyurethane self-matting resin emulsions （PUX） were prepared by using polyhexamethylene adipate glycol （PHA）, polybutylenes adipate glycol （PBA）, isophorone diisocyanate （ IPDI ） and 2,2-dimethylolbutanoic acid （DMBA） as monomers, trimethylol propane （TMP） as crosslinking agent, and ethylenediamine as chain extender. And then the corresponding films （PUF） were prepared. The chemical structure of emulsion was characterized by FTIR. The morphology of emulsion particles were investigated by SEM and TEM. And the glossiness, water resistance, acid and alkali resistance, and thermodynamic properties of films were tested. The results showed that the surface of film was rough, the average particle size of emulsion was above 1000 nm and the degree of gloss was about 2.0, which met requirements of the extinction. The tensile strength, glass-transition temperature （Tg） , 10% weight loss rate temperature of film without addition of crosslinking agent （ PUF-1 ） were 8.3 MPa, - 45℃ and 275.7℃, respectively. And the water absorption rates of PUF-1 for deionized water, acid solution and alkali solution were 29.1%,27.0% and 17.2% ,respectively. While the film containing 0. 65% crosslinking agent based on the total mass of the monomers （PUF-5） exhibited a tensile strength of 21.4 MPa, Tg of -40℃, 10% weight loss rate temperature of 305.6 ~C, and water absorption rates of 3.2% , 6.2% and 5.0% for deionized water, acid solution and alkali solution, respectively.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2017年第12期1334-1339,共6页
Fine Chemicals
基金
国家自然科学基金项目(51173001)
安徽省高校自然科学研究重点项目(KJ2016A792)
安徽省自然科学基金项目(11040606M59)~~
关键词
水性聚氨酯
消光
内交联
耐热性
功能材料
waterborne polyurethane
extinction
internal crosslinking
heat resistance
functional materials
