| Abstract [eng] |
Biodegradable polymer composite films were formed from polymeric binder, cross-linked linseed oil-based polyphosphate, and various natural fillers (horn meal, phosphogypsum, rapeseed cake, pine needles, pine bark, grain mill waste or mixture of grain waste and weed). Cross-linked polyphosphate was obtained by mixing of epoxydized linseed oil and aqueous solution of 1-hydroxyethane-1,1-diphosphonic acid without any catalyst and organic solvents. Polymeric composite films were formed by casting of reaction mixture of polymeric binder starting materials and natural fillers on substrate. Such polymer composite films can be formed directly on soil and used as mulching films in agriculture and forestry. Dependency of composite curing time on temperature, dilution, filler type and amount was investigated. Mechanical and thermal properties, combustibility, moisture permeability, surface wetting, swelling in water, and biodegradability of formed polymeric composite films were investigated. Linseed oil-based cross-linked polyphosphate composite films can be formed in one day at (20-25) °C, their mechanical, thermal properties and permeability allow them to use for mulching, they are capable to keep moisture in the soil, are biodegradable and compostable. Technological scheme of polymer composite film production was made. |
