苯并三唑衍生物杂化聚氨酯基复合材料的微观形貌及力学性能探究
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摘要
本工作研究了苯并三唑类小分子UV-329杂化聚醚型聚氨酯基复合材料的微观形貌和力学性能,制备了不同UV-329含量(10%、20%、25%、30%、40%、50%、60%,质量分数)的TPU/UV-329复合材料。采用扫描电子显微镜(SEM)、傅里叶变换红外光谱仪(FTIR)表征了TPU/UV-329复合材料的微观形貌和结构,并采用万能材料试验机测试了其力学性能。结果表明:低含量UV-329复合材料的微观组织内相分离不明显,高含量UV-329复合材料的微观组织内产生相分离;而且随着聚氨酯含量减少,大量UV-329小分子单体逐渐向断面表层迁移,由此表明,UV-329小分子多数以单体状态混溶于基体内,UV-329破坏了基体的连续性。宏观上,复合材料的拉伸实验表明其拉伸性能符合Payne效应,即低应变下UV-329具有增强复合材料弹性模量和强度的作用;高应变时,复合材料的塑性行为增强。
This paper presented the study on the micro-morphology and mechanical properties of benzotriazole small molecule UV-329 hybridized polyether polyurethane( TPU) composites. TPU/UV-329 composites with various proportion( 10%,20%,25%,30%,40%,50%,60%,mass fraction) of UV-329 were prepared. Scanning electron microscope( SEM) and Fourier transform infrared spectroscope( FTIR) were employed to characterize the micro-morphology and structure of TPU/UV-329 composites,and their mechanical properties of the composites were tested by universal material testing machine. As could be seen from the results,there was no obvious phase separation in the microstructure of composites with low UV-329 contents by micro-morphology observation,while phase separation occurred in the microstructure of composites with high UV-329 contents. Additionally,the reduction of polyurethane proportion induced the gradual migration of a large number of UV-329 molecular monomers to the surface layer of the cross section,which indicated the miscible state of most UV-329 molecular monomers in the matrix,damaging the continuity of the matrix. As regard to the mechanical properties,the tensile test of the composite demonstrated the accordance of the tensile properties to Payne effect,namely,UV-329 was capable of improving the elastic modulus and strength of the composites at low strain,and enhancing the plastic behavior of the composites at high strain.
This paper presented the study on the micro-morphology and mechanical properties of benzotriazole small molecule UV-329 hybridized polyether polyurethane( TPU) composites. TPU/UV-329 composites with various proportion( 10%,20%,25%,30%,40%,50%,60%,mass fraction) of UV-329 were prepared. Scanning electron microscope( SEM) and Fourier transform infrared spectroscope( FTIR) were employed to characterize the micro-morphology and structure of TPU/UV-329 composites,and their mechanical properties of the composites were tested by universal material testing machine. As could be seen from the results,there was no obvious phase separation in the microstructure of composites with low UV-329 contents by micro-morphology observation,while phase separation occurred in the microstructure of composites with high UV-329 contents. Additionally,the reduction of polyurethane proportion induced the gradual migration of a large number of UV-329 molecular monomers to the surface layer of the cross section,which indicated the miscible state of most UV-329 molecular monomers in the matrix,damaging the continuity of the matrix. As regard to the mechanical properties,the tensile test of the composite demonstrated the accordance of the tensile properties to Payne effect,namely,UV-329 was capable of improving the elastic modulus and strength of the composites at low strain,and enhancing the plastic behavior of the composites at high strain.
引文
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2 Chun B C,Cho T K, Chong M H, et al. Journal of Materials Science, 2007,42(21),9045.
3 Li W L,Liu J L,Hao C W, et al. Polymer Engineering and Science, 2008,48(2),249.
4 Buskens P, Wouters M, Rentrop C, et al. Journal of Coatings Technology and Research, 2013,10(1),29.
5 Qin C L, Cai W M, Cai J, et al. Materials Chemistry and Physics, 2004,85(2-3),402.
6 Pashupati Pokharel, Sunwoong Choi, DaiSoo Lee. Composites Part A: Applied science & Manufacturing, 2015,69,168.
7 Nakamura Makito, Aoki Yasutomo, Enna Genichirou, et al. Journal of Elastomers and Plastics, 2015,47(6),515.
8 Feng X, Wang H Y, Shi Y J, et al. Materials Science & Engineering A, 2007,448(1),2538.
9 Bai Y P, Wang Z, Feng L Q. Materials & Design, 2010,31(3),1613.
10 Li Y Q, Hu K F, Jiao H Y, et al. Polymer Composites, 2015,36(1),198.
11 Thirumal M, Khastgir D, Singha N K, et al. Cellular Polymers, 2007,26(4),245.
12 Zuo K C, Zhang L,Peng J F, et al. Journal of Functional Materials, 2014,45(5),5065.
13 Fang Q H, Song B,Tee T T, et al. Composites Part B,2014,60(4),561.
14 Payne A R,Whittaker R E.Rubber Chemistry and Technology,1971,44(2),440.
15 Xiao D L, Zhao X Y, Xiang P, et al. China Synthetic Rubber Industry, 2009,32(1),12.
16 Kaneko H, Inoue K, Tominaga Y, et al. Materials Letters,2002,52(1-2),96.
17 Chang M C O, Thomas D A, Sperling L H. Journal of Applied Polymer Science, 1987,34(1),409.
18 Mondal S, Hu J L. Polymer International, 2006,55(9),1013.
19 Guo Y H , Zhao X P, Chen R R, et al. Materials Review B: Research article,2009,23(3),5(in Chinese).郭艳宏,赵小平,陈蓉蓉,等.材料导报:研究篇,2009,23(3),5.
20 Guo Y H, Song C, Chen R R, et al. Materials Review A: Review Papers, 2009,23(7),423(in Chinese).郭艳宏,宋川,陈蓉蓉,等.材料导报:综述篇,2009,23(7),423.
21 Zhang X L, Zhou H J, Chen X Q, et al. Polymeric Materials Science & Engineering, 2014,30(6),60.
22 Tang Q H, Ai Q S, Yang R J, et al. Polymer Science Series A,2014,56(4),441.
23 Foks J, Janik H,Russo R, et a1. European Polymer Journal, 1989,25(1),31.
24 Zhao X Y, Lu Y L, Xiao D L, et al. Macromolecular Materials & Engineering, 2009,294(5),345.
25 Wiechmann M, Port H, Frey W, et al.Joural of Physical Chemistry, 1991,95,1918.
26 Yin X T, Liu C Y, Lin Y, et al. Joural of Applied Polymer Science, 2015, DOI:10.1002/app.41954.
27 Zhao X Y, Cao Y J, Zou H,et al. Journal of Applied Polymer Science, 2012,123,3696.
28 Zhao X Y, Xiang P, Zhang L Q,et a1. Polymer,2007,48(20),6056.
29 Yu G Y, Li X B, Luo C. Journal of Nanchang University (Engineering & Technology), 2012,34(2),120(in Chinese).余桂英,李小兵,罗超.南昌大学学报(工科版), 2012,34(2),120.
30 Chang J, Tian B, Li L, et al. Advances in Materials Science and Engineering,DOI:10.1155/2018/9624701.