| abstract |
The invention discloses a degradable composite foamed plastic and a preparation method thereof, comprising: polyether polyol; polyester polyol; polycaprolactone; hexamethylene diisocyanate; glycol chain extender; Amine; Silicone Oil; Distilled Water. The preparation method is as follows: feeding and controlling temperature → mixing reaction → chain extension synthesis → gas generation and foaming → extrusion → water cooling molding → strip cutting → drying → packaging. In the present invention, various types of segments with degradation characteristics are introduced into the polyurethane matrix through molecular chain design to synthesize composite foamed plastics, and two or more foamed particles can be thermally bonded and combined to form a foam block, which is more widely applicable to Different market applications and performance requirements can better control the mechanical and degradation properties of composite foamed plastics. The preparation method generates carbon dioxide gas through the reaction of isocyanate and water, promotes the melt to form a foamed structure, saves troubles such as external foaming agent, pressure vessel, etc., and has the advantages of safety, simplicity, speed, stability and the like. |