Effect of Hard Segment Content on Properties of Polyester Thermosensitive Polyurethane Elastomer
LI Tingting, LIU Jinchun
Key Laboratory of Rubber-plastics, Ministry of Education, School of Polymer Science and Engineering, Qingdao University of Science & Technology, Qingdao 266042, China
Abstract: Diphenylmethane diisocyanate (MDI) system was used to synthesize temperature-sensitive polyurethane elastomers (CPU) with different hard segment contents by using the prepolymer method.The hard segment content was studied for normal temperature and temperature-varying mechanical properties of polyurethane elastomers. The effects of properties, dynamic properties, and temperature-sensitive properties of deformation. The results show that when the hard segment content is 62%, the tensile strength and tear strength of the material are the highest, and the elongation at break is the lowest; when the hard segment content is 63.5%, the hardness and glass transition temperature are the hig-hest; the tensile strength decreases with increasing temperature, and the elongation at break first increases and then decreases with increasing temperature, and reaches the maximum near the glass transition temperature. When the hard segment content is 62%, the overall performance of the CPU is excellent, and it has the typical deformation temperature sensitivity performance. With the change of external force, the change of the deformation and fixation rate of the polyurethane elastomer is not particularly obvious, which indicates that the cross-linking network of the CPU has a stable deformation and fixation rate. As the external force increases, the degree of damage to the cross-linking point becomes greater. Therefore, the deformation recovery rate decreases accordingly.
李廷廷, 刘锦春. 硬段含量对聚酯型温敏聚氨酯弹性体性能的影响[J]. 材料导报, 2021, 35(2): 2161-2165.
LI Tingting, LIU Jinchun. Effect of Hard Segment Content on Properties of Polyester Thermosensitive Polyurethane Elastomer. Materials Reports, 2021, 35(2): 2161-2165.
1 Liu T Y, Huang R, Qi X D,et al. Polymer, 2017, 114, 28. 2 Lin T F, Tang Z H, Guo B C. ACS Applied Materials & Interfaces, 2014, 6, 21060. 3 Anthamatten M, Roddecha S, Li J H. Macromolecules, 2013, 46, 4230. 4 Xie T.Polymer, 2011, 52, 4985. 5 Song G B, Ma N, Li H N.Engineering Structures, 2006, 28, 1266. 6 Sydney J, Minne S. Polymer-Plastics Technology and Engineering, 2007, 46 (4), 353. 7 Gu S L, Sadhan J.Polymers-Basel, 2014, 6, 1008. 8 Yang X F. Study on star shape memory polyurethane. Master's Thesis, Southwest Jiaotong University, China, 2014(in Chinese). 杨希凤. 星型形状记忆聚氨酯的研究. 硕士学位论文, 西南交通大学, 2014. 9 Zhang H Y. Study on shape memory waterborne polyurethane. Master's Thesis, East China University of Science and Technology, China, 2011(in Chinese). 张海燕. 形状记忆水性聚氨酯的研究. 硕士学位论文, 华东理工大学, 2011. 10 Meng H, Li G Q. Polymer, 2013, 54, 2199. 11 Li F K, Zhu W K, Zhang X, et al. CHinese Journal of Polymer Science, 1998, 16, 155. 12 Zhang C S, Ni Q Q. Composite Structures, 2007, 78, 153. 13 Leng J S, Lan X, Liu Y J, et al. Progress in Materials Science, 2011, 56, 1077. 14 Feldkamp D M, Rousseau I A.Macromolecular Materials and Enginee-ring, 2010, 295, 726. 15 Yakacki C M, Ortega A M, Frick C P,et al. Macromolecular Materials and Engineering, 2012, 297, 1160. 16 Rodriguez E D, Luo X F, Mather P T.ACS Applied Materials & Interfaces, 2011, 3, 152. 17 Morton M, Helminiak T E, Bueche F.Polymer Science, 1962, 57, 471. 18 Ping P, Wang W S, Chen X S, et al. Biomacromolecules, 2005, 6, 587.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2021, Vol. 35 
