Polymers used as soil conditioners to enhance the capability for protection against erosion of soil are important topics in environmental study. Polymer soil conditioners can stabilize the aggregates of soils, increase the infiltration and reduce the runoff and erosion of soil. In this work polyvinyl alcohol (PVA) was used. Its degradation in soils and its intermolecular interaction force with soils were studied. Pure PVA film、PVA with silica and PVA with alumina oxide were heated or treated with ultra-visible light. FTIR was used to observe the aging of PVA. The surfaces of the specimens were observed with SEM and AFM (atomic force microscope). Interaction force between PVA and the tip was measured with AFM. The effects of soils on the aging of PVA were discussed according to the experimental results. Effects of treating methods on the interaction force between soils and PVA were also discussed in this study.%聚烯醇可生物分解且无毒性,可做为土壤改良剂.其在土壤中受温度、紫外线影响而老化的问题为本研究的一部份.以加热及UV处理PVA膜与PVA与SiO2混合物.样品以FT-IR光谱了解其劣化情况.PVA膜与土壤之作用力则以原子力显微镜量测其力曲线与观察表面变化.此外PVA与SiO2混合物则以SEM观察其受热与受UV处理的结果.
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