2021年4月1日 · FTIR and SAXS confirm the melt of MDI/BD-based TPU exhibiting inhomogeneous features. The smaller long spacing of form I becomes larger than that of form II after partial hard domains melt above 200 °C. MDI/BD hard segment based TPUs exhibit two distinct polymorphs, form I and form II, when it is solution-cast at 60 and 145 °C.

2020年10月16日 · Here, the domain formation in TPUs with different hard segments (HS) and soft segments (SS) was investigated by a variety of techniques covering length-scales from ångströms to micrometers.

2023年5月22日 · 使用扫描电子显微镜(sem)和小角x射线(saxs)研究tpu的结晶结构，基于红外光谱对tpu的氢键变化进行半定量分析，使用原子力显微镜(afm)研究tpu的微相分离结构.

2015年3月11日 · In the present study, an in situ synchrotron-based approach combining WAXS, SAXS and radiographic imaging is used to provide new insights into the morphological changes and deformation behaviour...

2011年5月1日 · The analysis of morphological data obtained by SAXS and FT-IR measurements were correlated to thermal and dynamic mechanical properties of TPU samples suggesting a crucial role of the soft domains interface.

2019年9月26日 · The mechanical behavior and morphological variation of thermoplastic polyurethanes (TPUs) with different hard segment contents (HSCs) deformed at different temperatures are investigated using tensile machine, small-angle X-ray scattering (SAXS), and wide-angle X-ray scattering (WAXS) techniques.

2021年7月16日 · DSC, WAXD, SAXS, and rheology analysis had been used to describe the evolution of thermal behavior and viscoelasticity of TPU as a function of T a (annealing temperature) in its high-elastic state. Autoclave foaming was carried out to fabricate ETPU beads, and the expansion ratio, cell morphology and thermal behavior of bead foams were ...

摘要 当通过小角 x 射线散射 (saxs) 监测热塑性聚氨酯 (tpu) 的拉伸测试时，我们发现了硬域功能的填料到交联转换。 它的强度与化学成分有关，并控制着 TPU 的机械性能。

Rheological analysis confirms the formation of a physically entangled network of TPU and SA particles, displaying a significant increase in viscosity and yield stress. The resulting crosslinked hybrid network demonstrates thermal and mechanical robustness, with a highly porous structure, hierarchical morphology, and improved thermal stability.

摘要：通过光学双折射、小角X射线散射（SAXS）和广角X射线散射（WAXS）等研究热塑性聚氨酯（TPU）在注射成型过程中熔体流动场对其取向形态演变、残余应力和力学性能的影响。 双折射结果表明，沿熔体流动路径上制件残余应力降低。 由SAXS和WAXS结果可知，TPU分子链中的硬段沿熔体流动方向取向，而团聚成的硬域垂直于熔体流动方向取向。 TPU拉伸性能沿熔体流动方向和垂直于熔体流动方向呈现出明显的差异性，制件中间区域的拉伸强度最高，这是因为硬段和 …