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首页> 美国政府科技报告 >Machining Initiatives for Aerospace Subcontractors Management Planning and Control System. Volume 2. Users Manual. Part 2. Process Planning.
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Machining Initiatives for Aerospace Subcontractors Management Planning and Control System. Volume 2. Users Manual. Part 2. Process Planning.

机译：航空航天分包商管理规划和控制系统的加工计划。第2卷。用户手册。第2部分。流程规划。

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Chemical modification of the surface of a polymer changes its free energy of interaction with contacting solids or liquids, while leaving its bulk physical properties largely unchanged. The ability to control interfacial interactions by chemical modification of a surface is important for applications involving properties -- adhesion, biocompatibility, printability, static discharge -- that depend on wetting or on hydrophilicity. The relations between the structures of the surfaces of surface-modified polymers and their wettability has been studied. The meaning of the phrase 'structure of the surface' in this context is not sharply defined, but includes those characteristics of the solid/liquid interface -- functional group types, orientation and distribution; surface topology; bulk polymer properties -- that influence wetting. These studies have led to a useful understanding of the factors that control wetting, phrased in the qualitative terms of physical organic chemistry. Our research has explored synthetic methods for introducing organic functional groups at the surface of polyethylene, and has examined the thermal stability of the resulting functionalized interfaces in detail. (aw)

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