| 聚丙烯-环己烷溶液体系的特性粘数-分子量方程 |
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| 引用本文： | 谢平,应琦琮,施良和. 聚丙烯-环己烷溶液体系的特性粘数-分子量方程[J]. 高分子学报, 1990, 0(3): 257-262 |
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| 作者姓名： | 谢平 应琦琮 施良和 |
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| 作者单位： | 中国科学院化学研究所 北京(谢平，应琦琮)，中国科学院化学研究所 北京(施良和) |
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| 基金项目： | 中国科学院自然科学基金 (84)210 |
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| 摘 要： | 用粘度及凝胶渗透色谱法订定了聚丙烯-环己烷体系60℃的特性粘数方程,[η]=0.123M~0.61。
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| 关 键 词： | 聚丙烯 Mark-Houwink方程 特性粘数 高温粘度 |
| 收稿时间： | 1988-07-01 |
DETERMINATION OF THE COEFFICIENT OF MARK-HOUWINK EQUATION FOR POLYPROPYLENE-CYCLOHEXANE SYSTEM |
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| XIE Ping,YING Qi-cong,SHI Liang-he. DETERMINATION OF THE COEFFICIENT OF MARK-HOUWINK EQUATION FOR POLYPROPYLENE-CYCLOHEXANE SYSTEM[J]. Acta Polymerica Sinica, 1990, 0(3): 257-262 |
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| Authors: | XIE Ping YING Qi-cong SHI Liang-he |
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| Affiliation: | Institute of Chemistry; Academia Sinica; Beijing |
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| Abstract: | A new way of dissolving isotactic polypropylene (PP) in cyclohexane, by putting the samples in cyclohexane under a pressure of 3-4 atm. at 140℃ for 2-3 hrs is introduced. By using a specially designed hermetic viscomter, intrinsic viscosities [η] of PP samples were measured at 60℃ and 70℃- The data viscosity are reproducible and show that PP samples were not degraded even without antioxidant added and cyclohexane is a good solvent of PP at this measuring condition. The values of Huggin's constant are within the range of 0.36±0.02.Mark-Houwink equations [η] = 1.23 ×10-1M0.61(60℃) and [η] = 9.20×10-2 M0.63(70℃) are obtained. Molar mass distributions of six PP samples are measured by GPC by using an Apple II personal computer and iterative technique. |
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| Keywords: | Polypropylene Mark-Houwink equation Intrinsic viscosity Molecular weight |
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