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作为柔性链段函数的嵌段热塑性聚氨酯的可调结构与性能

Tunable Structure and Properties of Segmented Thermoplastic Polyurethanes as a Function of Flexible Segment.

作者信息

Asensio Manuel, Costa Victor, Nohales Andrés, Bianchi Otávio, Gómez And Clara M

机构信息

Institute of Materials Science, University of Valencia, 46980 Paterna, Valencia, Spain.

R&D Department UBE CORPORATION EUROPE, S.A., 12100 Castellon, Spain.

出版信息

Polymers (Basel). 2019 Nov 20;11(12):1910. doi: 10.3390/polym11121910.

DOI:10.3390/polym11121910
PMID:31756912
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6960985/
Abstract

Segmented thermoplastic polyurethanes (PUs) were synthetized using macrodiols with different functional groups (carbonate, ester, and /or ether) as a segment with a molar mass of 1000 and 2000 g/mol, and 4,4'-diphenylmethane diisocyanate (MDI) and 1,4-butanediol as a rigid segment. The polyurethanes obtained reveal a wide variation of microphase separation degree that is correlated with mechanical properties and retention of tensile properties under degradation by heat, oil, weather, and water. Different techniques such as differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), Fourier transform infrared (FTIR), and synchrotron small-angle X-ray scattering (SAXS) were used to determine rigid-flexible segments' phase behaviour. Retention of tensile properties determines the stability of the samples under different external factors. This work reveals that pure polycarbonate-based macrodiols induce the highest degree of phase miscibility, better tensile properties, hardness shore A, and retention of tensile properties under external agents.

摘要

采用具有不同官能团（碳酸酯、酯和/或醚）、摩尔质量为1000和2000 g/mol的大分子二醇作为软段，4,4'-二苯基甲烷二异氰酸酯（MDI）和1,4-丁二醇作为硬段，合成了嵌段热塑性聚氨酯（PU）。所制得的聚氨酯呈现出微相分离程度的广泛变化，这与机械性能以及在热、油、气候和水降解条件下拉伸性能的保持情况相关。采用差示扫描量热法（DSC）、动态力学分析（DMA）、傅里叶变换红外光谱（FTIR）和同步辐射小角X射线散射（SAXS）等不同技术来确定硬软段的相行为。拉伸性能的保持决定了样品在不同外部因素下的稳定性。这项工作表明，纯聚碳酸酯基大分子二醇会导致最高程度的相混溶性、更好的拉伸性能、邵氏A硬度以及在外部介质作用下拉伸性能的保持。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/b17a56a35374/polymers-11-01910-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/01cb025a8023/polymers-11-01910-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/733df53a974f/polymers-11-01910-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/b9a9e413953d/polymers-11-01910-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/fce59f14e947/polymers-11-01910-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/6d00b2e5c465/polymers-11-01910-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/efbfec04517b/polymers-11-01910-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/fdac583e9899/polymers-11-01910-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/3d610ab08144/polymers-11-01910-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/eaa3e98090d6/polymers-11-01910-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/b17a56a35374/polymers-11-01910-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/01cb025a8023/polymers-11-01910-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/733df53a974f/polymers-11-01910-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/b9a9e413953d/polymers-11-01910-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/fce59f14e947/polymers-11-01910-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/6d00b2e5c465/polymers-11-01910-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/efbfec04517b/polymers-11-01910-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/fdac583e9899/polymers-11-01910-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/3d610ab08144/polymers-11-01910-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/eaa3e98090d6/polymers-11-01910-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/dc00/6960985/b17a56a35374/polymers-11-01910-g009.jpg

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