| 纳米银改性聚丙烯的非等温结晶动力学研究 |
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| 引用本文： | 王弼偲,丁长坤,赵渝,程博闻. 纳米银改性聚丙烯的非等温结晶动力学研究[J]. 功能材料, 2012, 43(12): 1516-1518,1523 |
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| 作者姓名： | 王弼偲 丁长坤 赵渝 程博闻 |
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| 作者单位： | 1. 重庆医科大学附属第一医院重庆市普外科重点实验室,重庆,400016
2. 天津工业大学改性与功能纤维天津市重点实验室,天津,300160 |
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| 基金项目： | 国家自然科学基金面上资助项目(30872534);重庆市科技攻关计划资助项目(CSTC,2010AB5116) |
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| 摘 要： | 采用共混造粒法制备了含0.5％纳米银的聚丙烯抗菌切片,利用差示扫描量热(DSC)法研究了聚丙烯及纳米银改性聚丙烯的非等温结晶行为及其动力学.结果表明,纳米银的加入使聚丙烯非等温结晶过程的成核自由能降低.Avrami方程能正确地描述聚丙烯及纳米银改性聚丙烯的非等温结晶过程.加入纳米银以后,材料的成核机理和晶体生长几何基本没有变化.聚丙烯和纳米银改性聚丙烯的Avrami指数的平均值分别为4.01和4.28,表明二者在非等温结晶时均以三维球晶方式生长.
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| 关 键 词： | 纳米银 聚丙烯 非等温结晶 结晶动力学 |
Nonisothermal crystallisation kinetics of nano-silver modified polypropylene |
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| WANG Bi-si , DING Chang-kun , ZHAO Yu , CHENG Bo-wen. Nonisothermal crystallisation kinetics of nano-silver modified polypropylene[J]. Journal of Functional Materials, 2012, 43(12): 1516-1518,1523 |
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| Authors: | WANG Bi-si DING Chang-kun ZHAO Yu CHENG Bo-wen |
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| Affiliation: | 1.Department of General Surgery,the First Affiliated Hospital of Chongqing Medical University, Chongqing 400016,China; 2.Tianjin Municipal Key Laboratory of Fiber Modification and Functional Fiber, Tianjin Polytechnic University,Tianjin 300160,China) |
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| Abstract: | Polypropylene antibacterial chips containing 0.5wt% nano-silver were prepared by blending and gra-nulation.The nonisothermal crystallization behavior and crystallization kinetics of polypropylene and nano-silver modified polypropylene were investigated by differential scanning calorimetry.The results show that the nucleation free energy of polypropylene was decreased with the addition of nano-silver during the nonisothermal crystallization process.The Avrami equation could describe nonisothermal crystallization of polypropylene and nano-silver modified polypropylene very well.Their nucleation mechanism and geometry of crystal growth remained almost unchanged with the addition of nano-silver.The Avrami exponent n of polypropylene and nano-silver modified polypropylene were around 4.01 and 4.28 respectively,indicating that their spherulites all deve-loped in three-dimentional field. |
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| Keywords: | nano-silver polypropylene nonisothermal crystallization crystallization kinetics |
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