CAJ | 학술논문

以聚己二酸二乙二醇酯(PDEA)为软段,4,4'-二苯基甲烷二异氰酸酯(MDI)和对苯二酚双(2-羟乙基)醚(HQEE)为硬段,采用预聚体法制备了硬段质量分数分别为30%,35%和40%的新型热塑性聚氨酯弹性体(TPU),对 TPU 的力学性能、结晶性能以及动态流变性能进行研究。结果表明：TPU 的硬度、拉伸强度和100%定伸应力都随着 TPU 中硬段含量的增加而提高,而断裂伸长率则逐渐减小；不同硬段含量 TPU 均为无定形状态；TPU 熔体的复数黏度均随着角频率的增加而减小,且复数黏度随着硬段含量的增加而增大；TPU 的储能模量均随着温度的升高而降低,且随硬段含量的增加而增大。
이취기이산이을이순지(PDEA)위연단,4,4'-이분기갑완이이청산지(MDI)화대분이분쌍(2-간을기)미(HQEE)위경단,채용예취체법제비료경단질량분수분별위30%,35%화40%적신형열소성취안지탄성체(TPU),대 TPU 적역학성능、결정성능이급동태류변성능진행연구。결과표명：TPU 적경도、랍신강도화100%정신응력도수착 TPU 중경단함량적증가이제고,이단렬신장솔칙축점감소；불동경단함량 TPU 균위무정형상태；TPU 용체적복수점도균수착각빈솔적증가이감소,차복수점도수착경단함량적증가이증대；TPU 적저능모량균수착온도적승고이강저,차수경단함량적증가이증대。
Using polydiethylene glycol adipate diol (PDEA) as the soft segments and 4,4'-two phenyl methane diisocyanate (MDI) and hydroquinone-bis (2-hydroxyethy)ether (HQEE) as the hard segments, a new type of thermoplastic polyurethane elastomer (TPU)containing 30%,35% and 40% hard segment respectively was prepared by pre-polymer method.The mechanical properties,crystallization properties and dynamic rheo-logical properties of TPU were studied. The results show that the hardness, tensile strength and the tensile stress at 100% of TPU increase when the content of hard segment increases,whereas the elongation at break decreases. All TPU with different hard seg-ment contents are amorphous.The complex viscosity of TPU decreases with the increasing of angular frequency,and the complex viscosity of TPU increases with the increasing of the content of hard segment.The storage modulus of TPU decreases as the temperature rises and increases with the increasing of the content of hard segment.