Polylactic acid/PC (polycarbonate) alloy containing biodegradable material and preparation method thereof
A biodegradable material and polycarbonate technology are applied in the field of biodegradable materials containing polylactic acid/polycarbonate (PC) alloy and their preparation, achieving the effects of fast biodegradation, low cost and broad market prospects
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Embodiment 1
[0027] Weigh 10 kilograms of a mixture of 40% polycarbonate, 50% polylactic acid, and 10% ethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA) according to the weight ratio. Dry polylactic acid and polycarbonate for 1.5 hours first, then polycarbonate, ethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA), polylactic acid at a speed of 800 rpm The high-speed mixer is used for uniform mixing, and the mixed material is put into a twin-screw extruder to melt and extrude to granulate, and the extrusion temperature is 190-220°C. Dry the extrudate. Add it again to a twin-screw extruder for melt extrusion and granulation, and the extrusion temperature should be 190-220°C. The re-extruded material is dried and then added to an injection molding machine for injection molding into a sheet. Then the natural degradation experiment was carried out. The natural degradation experiment was carried out in accordance with the provisions of the national standard GB / T20197-2006. The ...
Embodiment 2
[0029] Weighing polycarbonate 45%, polylactic acid 42%, ethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA) 5% and ethylene-butyl acrylate (E-BA) 8% by weight % of the mixture 10 kg. Dry polylactic acid and polycarbonate for 1.5 hours first, then polycarbonate, ethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA), polylactic acid at a speed of 800 rpm The high-speed mixer is used for uniform mixing, and the mixed material is put into a twin-screw extruder to melt and extrude to granulate, and the extrusion temperature is 190-220°C. Dry the extrudate. Add it again to a twin-screw extruder for melt extrusion and granulation, and the extrusion temperature should be 190-220°C. The re-extruded material is dried and then added to an injection molding machine for injection molding into a sheet. Then the natural degradation experiment was carried out. The natural degradation experiment was carried out in accordance with the provisions of the national standard GB / T20197-...
Embodiment 3
[0031] Weigh 55% polycarbonate, 30% polylactic acid, 5% styrene-acrylonitrile copolymer grafted maleic anhydride, 5% styrene-maleic anhydride random polymer (SMA), polylactic acid 10 kg of mixed material of grafted maleic anhydride (LAM) 3% and n-butyl titanate 2%. Dry polylactic acid and polycarbonate for 1.5 hours, then graft polycarbonate, styrene-acrylonitrile copolymer with maleic anhydride, styrene-maleic anhydride random polymer (SMA), polylactic acid Grafted maleic anhydride (LAM), n-butyl titanate, and polylactic acid were mixed evenly in a high-speed mixer with a rotation speed of 800 rpm, and the mixture was added to a twin-screw extruder to melt, extrude, and granulate. The temperature is 190-220°C. Dry the extrudate. Add it again to a twin-screw extruder for melt extrusion and granulation, and the extrusion temperature should be 190-220°C. The re-extruded material is dried and then added to an injection molding machine for injection molding into a sheet. Then ...
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