Spectroscopic Study of the Penetration Depth of Grafted Polystyrene onto Poly(Tetrafluoroethylene-Co-Perfluoropropylvinylether) Substrates 1. Effect of Grafting Conditions
Spectroscopic Study of the Penetration Depth of Grafted Polystyrene onto Poly(Tetrafluoroethylene-Co-Perfluoropropylvinylether) Substrates 1. Effect of Grafting Conditions
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聚四氟乙烯-全氟丙基乙烯基醚接枝聚苯乙烯渗透深度的光谱研究 1. 接枝条件的影响
DOI：
10.1002/pola.10409
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
S. Perera
中科院分区：
文献类型：
--
作者：
F. Cardona;G. George;D. Hill;S. Perera
本文研究了苯乙烯在聚全氟丙基乙烯基醚（PFA）基体上的辐射接枝及其渗透深度。采用同步辐射法进行接枝，并用显微拉曼光谱技术进行了光谱分析。考察了溶剂种类、剂量率、辐照剂量等条件对接枝率的影响。在所用的不同溶剂中，在增加接枝率方面最有效的分别是二氯甲烷、苯和甲醇。甲醇和二氯甲烷的混合物用作苯乙烯的溶剂，实现了更高的接枝程度和浓度的接枝聚苯乙烯到PFA基板的表面上比在单独的溶剂中的单体的溶液。接枝的程度随着辐射剂量的增加而增加至500 kGy，在此剂量以上稳定。然而，随着剂量率的增加，接枝率下降。在整体接枝率的增加是伴随着成比例增加的接枝到基板中的渗透深度。(C)2002 Wiley Periodicals，Inc.
This study concerns the radiation grafting of styrene onto poly(tetrafluoroethylene-co-perfluoropropylvinylether) (PFA) substrates and the penetration depth of the graft. Grafting was obtained by the simultaneous irradiation method, and the spectroscopic analysis was made with the micro-Raman technique. Effects of grafting conditions such as the type of solvent, dose rate, and irradiation dose on the grafting yield were investigated. Of the different solvents used, the most efficient in terms of increasing grafting yield were dichloromethane, benzene, and methanol, respectively. A mixture of methanol and dichloromethane used as a solvent for styrene achieved a higher degree of grafting and concentration of grafted polystyrene onto the surface of PFA substrates than solutions of the monomer in the separate solvents. The degree of grafting increased with increasing radiation dose up to 500 kGy, stabilizing above this dose. However, the grafting yield decreased with an increase in the dose rate. The increase in the overall grafting yield was accompanied by a proportional increase in the penetration depth of the grafts into the substrate. (C) 2002 Wiley Periodicals, Inc.