填料对聚降冰片烯可逆塑性形状记忆性能的影响
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摘要
以聚降冰片烯(PNB)为基体,填充炭黑、多壁碳纳米管、有机蒙脱土(OMMT)和碳酸钙等不同维度的粒子制备了PNB复合材料,研究了材料的微观结构、玻璃化转变温度、动态力学性能、力学性能和可逆塑性形状记忆性能等。结果表明,4种PNB复合材料的玻璃化转变温度均出现在23℃附近,有利于常温下可逆形变。在低变形温度下,材料的形状固定率均达到80.0%左右,其中OMMT-PNB最高,并且4种材料的形状恢复率均在90.0%左右,相差较小。随着变形温度的升高,尤其是超过玻璃化转变温度时,材料的形状固定率降低幅度较大。OMMT在PNB基体中的补强能力强,使得OMMT-PNB具有较高的形状固定率和形状恢复率,因此其可逆塑性形状记忆性能最优异。
The polynorbornene(PNB) composites were prepared using PNB as the matrix and filled with particles of different dimensions such as carbon black, multi-walled carbon nanotubes, organic montmorillonite(OMMT) and calcium carbonate. And the microstructure, glass transition temperature, dynamic mechanical properties, mechanical properties and reversible plastic shape memory pro-perties of the composites were studied. The results showed that the glass transition temperatures of the four kinds of PNB composites were all around 23 ℃, which was conducive to reversible deformation at room temperature. At low deformation temperature, the shape fixed ratio of the composites was about 80.0%, among which OMMT-PNB was the highest, and the shape recovery ratio of the four composites were all about 90.0%, the difference was small. With the increase of deformation temperature, especially over the glass transition temperature, the shape fixed ratio of the composites decreased greatly. Because OMMT had strong reinforcing ability in PNB matrix, OMMT-PNB had higher shape fixed ratio and shape recovery ratio, so its reversible plastic shape memory performance was the best.
The polynorbornene(PNB) composites were prepared using PNB as the matrix and filled with particles of different dimensions such as carbon black, multi-walled carbon nanotubes, organic montmorillonite(OMMT) and calcium carbonate. And the microstructure, glass transition temperature, dynamic mechanical properties, mechanical properties and reversible plastic shape memory pro-perties of the composites were studied. The results showed that the glass transition temperatures of the four kinds of PNB composites were all around 23 ℃, which was conducive to reversible deformation at room temperature. At low deformation temperature, the shape fixed ratio of the composites was about 80.0%, among which OMMT-PNB was the highest, and the shape recovery ratio of the four composites were all about 90.0%, the difference was small. With the increase of deformation temperature, especially over the glass transition temperature, the shape fixed ratio of the composites decreased greatly. Because OMMT had strong reinforcing ability in PNB matrix, OMMT-PNB had higher shape fixed ratio and shape recovery ratio, so its reversible plastic shape memory performance was the best.
引文
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[2] Wu Tongfei,O′Kelly K,Chen Biqiong.Poly(vinyl alcohol) particle-reinforced elastomer composites with water-active shape-memory effects[J].European Polymer Journal,2014,53(4):230-237.
[3] Leng Jinsong,Lan Xin,Liu Yanju,et al.Shape-memory polymers and their composites:Stimulus methods and applications[J].Progress in Materials Science,2011,56(7):1077-1135.
[4] 马艳,石文鹏,赵辰阳,等.聚乳酸基可降解形状记忆聚合物的制备、结构与性能[J].化学学报,2011,69(6):719-724.
[5] 崔昌亿,谭乃迪.降冰片烯及其衍生物之利用[J].吉林化工学院学报,1996,13(1):72-78.
[6] Rodriguez E D,Luo Xiaofan,Mather P T.Linear/network poly(ε-caprolactone) blends exhibiting shape memory assisted self-healing (SMASH)[J].Acs Appl Mater Interfaces,2011,3(2):152-161.
[7] Xiao Rui,Choi J,Lakhera N,et al.Modeling the glass transition of amorphous networks for shape-memory behavior[J].Journal of the Mechanics & Physics of Solids,2013,61(7):1612-1635.
[8] Xie Tao.Recent advances in polymer shape memory[J].Polymer,2011,52(22):4985-5000.
[9] 赖学平.形状记忆环氧树脂的制备及性能研究[D].哈尔滨:哈尔滨工业大学,2007.
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[11] 曲明.聚降冰片烯形状记忆性能的研究[D].青岛:青岛科技大学,2017.
[12] Gu Senlong,Jana S.Effects of polybenzoxazine on shape me-mory properties of polyurethanes with amorphous and crystalline soft segments[J].Polymers,2014,6(4):1008-1025.
[13] Zhang Xuhui,Tang Zhenghai,Guo Baochun.Reversible plasticity shape memory polymers:Key factors and applications[J].Journal of Polymer Science( Part B:Polymer Physics) ,2016,54(14):1295-1299.