PTMG含量对HMDI型PUE微观结构的影响  

Influence of PTMG content on microstructure of HMDI type PUE

作　　者：张家平 曹兰[1] 白晓军 宗成中[1] Zhang Jiaping;Cao Lan;Bai Xiaojun;Zong Chengzhong(School of Polymer Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042;Qingdao Guogong High Tech Materials Co.,Ltd.,Qingdao 266000)

机构地区：[1]青岛科技大学高分子科学与工程学院,青岛266042 [2]青岛国工高新材料有限公司,青岛266000

出　　处：《化工新型材料》2022年第10期184-188,共5页New Chemical Materials

基　　金：山东省自然科学基金青年基金项目(ZR2020QE072);山东省科技型中小企业创新能力提升工程项目(2021TSGC1153)。

摘　　要：通过预聚体法,以聚四氢呋喃醚二醇(PTMG-1000)、4,4′-二环己基甲烷二异氰酸酯(HMDI)、3,3′-二氯-4,4′-二氨基二苯基甲烷(MOCA)、二甲硫基甲苯二胺(DMTDA)为主要原材料,合成不同PTMG质量含量的聚氨酯弹性体(PUE)。采用红外光谱仪(FT-IR)、X射线衍射仪(XRD)、差示量热仪(DSC)和力学性能测试等手段研究了PTMG质量含量对PUE的羰基氢键化程度、结晶度、玻璃化转变温度(T)、耐低温性、模量等的影响。结果表明:PUE中大部分—NH参与构成氢键,并且PUE-43的氨基氢键化指数最高,PTMG质量含量最高的PUE-70中羰基氢键化指数、微相分离程度、耐低温性、结晶性均最佳,T最低。在PUE-49时力学性能最好。Polytetrahydrofuran ether glycol(PTMG-1000),4,4′-dicyclohexylmethane diisocyanate(HMDI),3,3′-dichloro-4,4′-diaminodiisocyanate phenylmethane(MOCA) and dimethylthiotoluenediamine(DMTDA) used as the main raw materials, polyurethane elastomers(PUE) with different PTMG contents were synthesized by prepolymer method.The effects of PTMG mass contents on the carbonyl hydrogen bonding degree, crystallinity, glass transition temperature(T),low temperature resistance and modulus of PUE were studied by means of FT-IR,XRD,DSC,and mechanical property testing.The results showed that most of —NH in PUE participates in forming hydrogen bonds, and PUE-43 had the highest amino hydrogen bonding index.PUE-70 with the highest PTMG content had carbonyl hydrogen bonding index, degree of microphase separation, low temperature resistance, the crystallinity was the best, and the Twas the lowest.The best mechanical properties were obtained at PUE-49.

关 键 词：聚四氢呋喃醚二醇 红外拟合 微观结构 力学性能 

分 类 号：TQ334.1[化学工程—橡胶工业]