| 聚合物/超临界CO2挤出发泡中影响进气状况的因素 |
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| 引用本文： | 吴晓丹,彭玉成,蔡业彬.聚合物/超临界CO2挤出发泡中影响进气状况的因素[J].工程塑料应用,2005,33(9):57-60. |
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| 作者姓名： | 吴晓丹 彭玉成 蔡业彬 |
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| 作者单位： | 1. 华南理工大学工业装备与控制工程学院,广州,510641;广东技术师范学院机电工程系,广州,510665
2. 华南理工大学工业装备与控制工程学院,广州,510641 |
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| 基金项目： | 广东省自然科学基金;广东省科技厅科技计划 |
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| 摘 要： | 研究了聚合物／超临界CO2挤出发泡中影响进气状况的因素，实验显示，挤出机压力分布应保证CO2在挤出全程都处于超临界条件下；进气点应设在熔融段与计量段之间，以保证聚合物熔化和进气后气体与聚合物的混合；进气压力与熔体压力之差越大，则进气量越大，合理的压力差为5～8MPa；进气量的大小主要受溶解度影响．可用压力差控制。
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| 关 键 词： | 压力分布 进气点 压力差 进气量 |
| 收稿时间： | 2005-07-21 |
| 修稿时间： | 2005年7月21日 |
FACTORS OF AFFECTING ON STATE OF INJECTED GAS IN POLYMER/SUPERCRITICAL CO2 EXTRUSION FOAMING SYSTEM |
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| Wu Xiaodan,Peng Yucheng,CAI Yebin.FACTORS OF AFFECTING ON STATE OF INJECTED GAS IN POLYMER/SUPERCRITICAL CO2 EXTRUSION FOAMING SYSTEM[J].Engineering Plastics Application,2005,33(9):57-60. |
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| Authors: | Wu Xiaodan Peng Yucheng CAI Yebin |
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| Abstract: | The factors of affecting on state of injected gas were studied in polymer/supercritical CO2 extrusion foaming svstem. The experiment results showed that the pressure distribution of extruder should guarantee CO2 under the supereritical condition in whole extruding process; The injection port of gas should be set up between molten segment and measurement segment to guarantee the melting effect of the polymer and the blending effect of gas and polymer; The bigger the pressure difference between injected gas and the molten polymer, the more the amount of injected gas. The reasonable pressure was between 5 -8 MPa; The amount of injected gas was mainly affected by solubility, and could be controlled by pressure difference between injected gas and the molten polymer. |
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| Keywords: | pressure distribution injection port of gas pressure difference amount of injected gas |
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