| 苯乙烯-丙烯嵌段共聚物等温结晶动力学的研究 |
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| 引用本文： | 许光学,林尚安.苯乙烯-丙烯嵌段共聚物等温结晶动力学的研究[J].高等学校化学学报,1995,16(1):139. |
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| 作者姓名： | 许光学 林尚安 |
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| 作者单位： | 广州中山大学高分子研究所, 广州 510275 |
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| 摘 要： | 用DSC法研究苯乙烯-丙烯嵌段共聚物(iPS-b-iPP)的等温结晶动力学。结果表明,在所选择的结晶温度(127～132℃)范围内,共聚物很好地符合Avrami动力学方程;共聚物结晶温度、结晶速率、结晶成核和生长方式都与共聚物结构和组成比有关,随着嵌段共聚物中iPS段含量的增加,结晶速率和Avranu指数(n)明显降低。
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| 关 键 词： | 苯乙烯－丙烯共聚物 DSC 等温结晶动力学 |
| 收稿时间： | 1994-04-21 |
Studies on Isothermal Crystallization Kinetics of iPS-b-iPP Block Copolymer |
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| XU Guang-Xue, LIN Shang-An.Studies on Isothermal Crystallization Kinetics of iPS-b-iPP Block Copolymer[J].Chemical Research In Chinese Universities,1995,16(1):139. |
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| Authors: | XU Guang-Xue LIN Shang-An |
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| Institution: | Institute of Polymer Science, Zhongshan University, Guangzhou, 510275 |
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| Abstract: | The isothermal crystallization Kinetics of styrene/propylene block copolymer(iPSb-iPP)has been investigated by DSC. The results indicated that the kinetics of isothermal crystallization for all of samples was fitted for the Avrami,equation quite well within selected crystallization temperature(127-132℃),and that the crystallization temperature, crystallization rate and crystal growing mechanism were affected by the composition ratio of iPS-biPP. With the increase of the content of iPSblock in iPS-b-iPP copolymers crystallization rate(G)and Avrami exponent(n) were significantly reduced.In addition, a discussion about the relationship between the growing mechanism of crystals and the composition ratio of iPSb-iPPwas made based on the Avrami exponents and TEM. |
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| Keywords: | Styrene-propylene copolymer DSC Isothermal crystallization kinetics |
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