高透明聚氨酯脲弹性体的制备与性能  

Preparation and Properties of High Transparent Polyurethane Urea Elastomer

作　　者：王玉龙 丁晓晨 刘俊华 张银柱 边祥成 WANG Yu-long;DING Xiao-chen;LIU Jun-hua;ZHANG Yin-zhu;BIAN Xiang-cheng(Department of Materials Engineering,Taiyuan Institute of Technology,Taiyuan 030008,China)

机构地区：[1]太原工业学院材料工程系,山西太原030008

出　　处：《塑料科技》2023年第2期55-58,共4页Plastics Science and Technology

基　　金：山西省高校科技创新基金项目(2021L551);山西省重点研发计划项目(202102040201005)。

摘　　要：以聚四氢呋喃醚二醇(PTMG)为软段,4,4’-二环己基甲烷二异氰酸酯(HMDI)和异佛尔酮二胺(IPDA)为硬段,采用预聚体法制备四种高透明的聚氨酯脲(PUU)弹性体。对PUU弹性体进行红外光谱、紫外光谱、力学性能、热学性能和流变性能等测试。结果表明:四种透明PUU弹性体均为无定型结构,在450 nm处紫外透过率均高于89.8%。随着硬段含量的增加,PUU弹性体的硬度、100%定伸模量和拉伸强度均增加,而断裂伸长率下降。PUU-2.7的硬度、100%定伸模量和拉伸强度分别达到92.5、18.3 MPa和53.7 MPa。PUU-1.5试样只有一个玻璃化转变温度,微相分离程度最低。硬段含量的增加,使PUU弹性体硬段间氢键作用增强,微相分离程度增大。Four highly transparent polyurethane urea(PUU) elastomers were prepared by prepolymer method using polytetrahydrofuran ether glycol(PTMG) as soft segment, 4,4’-dicyclohexylmethane diisocyanate(HMDI) and isophorone diamine(IPDA) as hard segment. The PUU elastomer was tested by infrared spectroscopy, ultraviolet spectroscopy,mechanical properties, thermal properties and rheological properties. The results show that the four transparent PUU elastomers are amorphous structures, and the UV transmittance at 450 nm is higher than 89.8%. With the increase of hard segment content, the hardness, modulus at 100% elongation and tensile strength of PUU elastomer increase, while the elongation at break decreases. The hardness, modulus at 100% elongation and tensile strength of PUU-2.7 are 92.5, 18.3 MPa and 53.7 MPa, respectively. PUU-1.5 sample has only one glass transition temperature and the lowest degree of microphase separation. With the increase of hard segment content, the hydrogen bonding between hard segments of PUU elastomer is enhanced, and the degree of microphase separation is increased.

关 键 词：聚氨酯脲 透明性 力学性能 氢键作用 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]