Control of Mechanical Properties of Thermoplastic Polyurethane Elastomers by Restriction of Crystallization of Soft Segment.
Control of Mechanical Properties of Thermoplastic Polyurethane Elastomers by Restriction of Crystallization of Soft Segment.
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DOI：
10.3390/ma3125097
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发表时间：
2010-12-01
期刊：
影响因子：
--
通讯作者：
Nakamura S
中科院分区：
文献类型：
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作者：
Kojio K;Furukawa M;Nonaka Y;Nakamura S
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））、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。对于基于聚醚二醇的聚氨酯弹性体(PUE)，采用聚(氧四亚甲基)二醇(PTMG)和结合二甲基基团(PTG-X)和甲基侧基(PTG-L)的PTMG作为聚合物二醇。对于PC-二醇，采用具有各种组成比（C4/C6 = 0/100、50/50、70/30和90/10）的碳酸酯基团之间具有六亚甲基（C6）和四亚甲基（C4）单元的无规共聚的PC-二醇。使用差示扫描量热法、动态粘弹性测量和拉伸测试研究了两种 PUE 的微相分离程度和机械性能。机械性能可以通过改变两种不同单体组分的摩尔比来控制。
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.