1. 毕业设计（论文）的内容和要求

主要内容包括： 本实验本课题通过加入抗氧剂和紫外光吸收剂来阻止高密度聚乙烯(hdpe)在加工以及使用过程中的老化，研究加入抗氧剂和紫外光吸收剂前后紫外光对hdpe的结构和性能的影响，并探索其紫外光老化机理。

本实验首先将hdpe和助剂在开炼机上于高温下进行机械混合，然后用模压法制成1mm的薄片，冲成哑铃型样条和圆形样片。

通过电子万能试验机、傅立叶变换红外光谱仪（ftir）、差示扫描量热（dsc）等对样品进行分析，对比空白hdpe和加入抗氧剂和紫外光吸收剂的hdpe在老化前后结构和性能的变化。

2. 参考文献

[1] S.H. Im, S.S. Choi, Role of the UV absorber as a matrix in matrix-assisted laser desorption/ionization mass spectrometric analysis of a mixture of a UV absorber and a stabilizer, Rapid communications in mass spectrometry : RCM, 24 (2010) 2753-2758. [2] F. Waiblinger, J. Keck, M. Stein, A.P. Fluegge, H.E.A. Kramer, D. Leppard, Light-induced opening of the intramolecular hydrogen bond of UV absorbers of the 2-(2-hydroxyphenyl)-1,3,5-triazine and the 2-(2-hydroxyphenyl)benzotriazole type, Journal of Physical Chemistry A, 104 (2000) 1100-1106. [3] M. Stein, J. Keck, F. Waiblinger, A.P. Fluegge, H.E.A. Kramer, A. Hartschuh, H. Port, D. Leppard, G. Rytz, Influence of polymer matrixes on the photophysical properties of UV absorbers, Journal of Physical Chemistry A, 106 (2002) 2055-2066. [4] A. Maliakal, G. Lem, N.J. Turro, R. Ravichandran, J.C. Suhadolnik, A.D. DeBellis, M.G. Wood, J. Lau, Twisted intramolecular charge transfer states in 2-arylbenzotriazoles: Fluorescence deactivation via intramolecular electron transfer rather than proton transfer, Journal of Physical Chemistry A, 106 (2002) 7680-7689. [5] D. Leppard, P. Hayoz, T. Schafer, T. Vogel, F. Wendeborn, Light stabilisers, Chimia, 56 (2002) 216-224. [6] J. Pospisil, S. Nespurek, Photostabilization of coatings. Mechanisms and performance, Progress in Polymer Science, 25 (2000) 1261-1335. [7] Z. Liu, S. Chen, J. Zhang, Effect of UV absorbers and hindered amine light stabilizers on the photodegradation of ethylene-octene copolymer, Journal of Applied Polymer Science, 127 (2013) 1135-1147. [8] Z. Liu, J. Jin, S. Chen, J. Zhang, Effect of crystal form and particle size of titanium dioxide on the photodegradation behaviour of ethylene-vinyl acetate copolymer/low density polyethylene composite, Polymer Degradation and Stability, 96 (2011) 43-50. [9] J. Jin, S. Chen, J. Zhang, UV aging behaviour of ethylene-vinyl acetate copolymers (EVA) with different vinyl acetate contents, Polymer Degradation and Stability, 95 (2010) 725-732. [10] S. Chen, J. Zhang, J. Su, Effect of damp-heat aging on the properties of ethylene-vinyl acetate copolymer and ethylene- acrylic acid copolymer blends, Journal of Applied Polymer Science, 114 (2009) 3110-3117. [11] X.-M. Shi, J. Zhang, D.-R. Li, S.-J. Chen, Effect of damp-heat aging on the structures and properties of ethylene-vinyl acetate copolymers with different vinyl acetate contents, Journal of Applied Polymer Science, 112 (2009) 2358-2365. [12] H.Z. Song, Z.Q. Luo, C.Z. Wang, X.F. Hao, J.G. Gao, Preparation and characterization of bionanocomposite fiber based on cellulose and nano-SiO2 using ionic liquid, Carbohydrate polymers, 98 (2013) 161-167. [13] Q. He, T. Yuan, J. Zhu, Z. Luo, N. Haldolaarachchige, L. Sun, A. Khasanov, Y. Li, D.P. Young, S. Wei, Z. Guo, Magnetic high density polyethylene nanocomposites reinforced with in-situ synthesized Fe@FeO core-shell nanoparticles, Polymer, 53 (2012) 3642-3652. [14] J. Zhu, S. Wei, Y. Li, L. Sun, N. Haldolaarachchige, D.P. Young, C. Southworth, A. Khasanov, Z. Luo, Z. Guo, Surfactant-Free Synthesized Magnetic Polypropylene Nanocomposites: Rheological, Electrical, Magnetic, and Thermal Properties, Macromolecules, 44 (2011) 4382-4391. [15] Z. Zhang, X. Zhao, J. Zhang, S. Chen, Effect of nano-particles-induced phase inversion on largely improved impact toughness of PVC/α-methylstyrene#8211;acrylonitrile copolymer (α-MSAN)/CPE-matrix composites, Composites Science and Technology, 86 (2013) 122-128. [16] D. Wu, L. Wu, M. Zhang, Y. Zhao, Viscoelasticity and thermal stability of polylactide composites with various functionalized carbon nanotubes, Polymer Degradation and Stability, 93 (2008) 1577-1584.

3. 毕业设计（论文）进程安排

起讫日期 设计（论文）各阶段工作内容 备 注 17.12.20--18.01.09 文献查阅，了解课题 18.01.10-18.01.15 英文文献翻译 18.02.21-18.03.06 完成开题报告和开题答辩 18.03.07-18.04.03 按照实验计划进行试验 18.04.04-18.04.06 清明节休假 18.04.07-18.04.30 实验并进行中期检查 18.05.01-18.05.03 劳动节休假 18.05.04-18.06.08 进行实验并撰写完成毕业论文 18.06.09-18.06.18 毕业论文答辩