Research Progress in Preparation and Application of Polyvinyl Formal Foam
Polyvinyl formal(PVF)foam is a kind of polymer material that can be degraded under natural conditions,which is prepared from polyvinyl alcohol(PVA)under acidic conditions by reacting with aldehydes.It has good dyeing,mechanical properties,solvent resistance,water absorption and water retention,and is widely used in the fields of biological carriers,noise elimination materials,functional medicine,etc.In this paper,the preparation process,process control and foaming molding method of PVF foam are introduced in detail,and its development prospect is put forward.Keywords:polyvinyl alcohol,polyvinyl formal,water absorption.
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