| 反应温度对聚3-乙基-3-羟甲基环氧丁烷支化度的影响 |
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| 引用本文： | 顾艳霞.反应温度对聚3-乙基-3-羟甲基环氧丁烷支化度的影响[J].化学工业与工程技术,2008,29(4):20-23. |
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| 作者姓名： | 顾艳霞 |
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| 作者单位： | 南京化工职业技术学院化工系,江苏,南京,210048 |
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| 摘 要： | 以3-乙基-3-羟甲基环氧丁烷为单体，BF1·O（C2H5）2为引发剂，二氯甲烷为溶剂，在-50～30℃的不同温度下通过阳离子自缩合开环聚合，合成超支化聚3-乙基-3-羟甲基环氧丁烷，产物相对分子质量在5000左右。^13C NMR测定结果表明，聚3-乙基-3-羟甲基环氧丁烷的支化度随聚合温度的升高而增大，聚合温度在20℃以上时聚合物支化度随反应温度的变化趋势变小，趋向不变。
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| 关 键 词： | 自缩合开环聚合 聚3-乙基-3-羟甲基环氧丁烷 支化度 聚合温度 |
Influence of temperature on degree of branching of poly [3-ethyl-3-(hydroxymethyl)oxetane] |
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| GU Yanxia.Influence of temperature on degree of branching of poly [3-ethyl-3-(hydroxymethyl)oxetane][J].Journal of Chemical Industry & Engineering,2008,29(4):20-23. |
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| Authors: | GU Yanxia |
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| Affiliation: | Gu Yanxia (Nanjing College of Chemical Technology, Nanjing 210048, China) |
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| Abstract: | Poly3-ethyl-3-(hydroxymethyl)oxetane](PEHO)is synthesized by self-condensing ring-opening polymerization under different reaction temperatures from-50 to 30℃using 3-ethyl-3-(hydroxymethyl)oxetane as monomer,BF_3·O (C_2H_5)_2 as initiator and CH_2Cl_2 as solvent.The molecular weights of PEHO characterized by SEC are all around 5 000.It is observed that the degree of branching(DB)determined by quantitative ~(13)C NMR increased with increasing of polymerization temperature,and only a little change in DB is observed when the reaction temperature is higher than 20℃. |
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| Keywords: | Self-condensing ring-opening polymerization Poly[3-ethyl-3-(hydroxymethyl)oxetane] Degree of branching Polymerization temperature |
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