通过限制软段结晶来控制热塑性聚氨酯弹性体的力学性能

Control of Mechanical Properties of Thermoplastic Polyurethane Elastomers by Restriction of Crystallization of Soft Segment.

作者信息

Kojio Ken, Furukawa Mutsuhisa, Nonaka Yoshiteru, Nakamura Sadaharu

机构信息

Materials Science and Engineering Department, Faculty of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.

Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.

出版信息

Materials (Basel). 2010 Dec 1;3(12):5097-5110. doi: 10.3390/ma3125097.

Mechanical properties of thermoplastic polyurethane elastomers based on either polyether or polycarbonate (PC)-glycols, 4,4'-dipheylmethane diisocyanate (1,1'-methylenebis(4-isocyanatobenzene)), 1,4-butanediol, were controlled by restriction of crystallization of polymer glycols. For the polyether glycol based-polyurethane elastomers (PUEs), poly(oxytetramethylene) glycol (PTMG), and PTMG incorporating dimethyl groups (PTG-X) and methyl side groups (PTG-L) were employed as a polymer glycol. For the PC-glycol, the randomly copolymerized PC-glycols with hexamethylene (C₆) and tetramethylene (C₄) units between carbonate groups with various composition ratios (C₄/C₆ = 0/100, 50/50, 70/30 and 90/10) were employed. The degree of microphase separation and mechanical properties of both the PUEs were investigated using differential scanning calorimetry, dynamic viscoelastic property measurements and tensile testing. Mechanical properties could be controlled by changing the molar ratio of two different monomer components.

基于聚醚或聚碳酸酯（PC）二醇、4,4'-二苯基甲烷二异氰酸酯（1,1'-亚甲基双（4-异氰酸苯酯））、1,4-丁二醇的热塑性聚氨酯弹性体的机械性能，通过限制聚合物二醇的结晶来控制。对于聚醚二醇基聚氨酯弹性体（PUEs），聚（氧四亚甲基）二醇（PTMG）以及含有二甲基（PTG-X）和甲基侧基（PTG-L）的PTMG被用作聚合物二醇。对于PC二醇，使用了在碳酸酯基团之间具有不同组成比（C₄/C₆ = 0/100、50/50、70/30和90/10）的含有六亚甲基（C₆）和四亚甲基（C₄）单元的无规共聚PC二醇。使用差示扫描量热法、动态粘弹性性能测量和拉伸试验研究了两种PUEs的微相分离程度和机械性能。通过改变两种不同单体组分的摩尔比可以控制机械性能。