Starch/thermoplastic polyurethane (TPU) composite material with high mechanical property and preparation method thereof
A technology of thermoplastic polyurethane and composite materials, which is applied in the field of biodegradable plastics, can solve the problems of reduced mechanical properties and poor compatibility of composite materials, and achieve the effects of short production process, good mechanical properties and wear resistance, and low price
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Embodiment 1
[0039] Example 1. 10 parts of corn starch, 90 parts of TPU, 8 parts of glycerin, 0.5 parts of nano-silica (with a particle size of more than 5000 mesh), 4 parts of nitrile rubber, 3 parts of POE, and 1 part of betaine After mixing evenly, add it to the double-roll mill, knead at 160~170°C for 8 minutes, and then granulate the molten sheet through a single-screw extruder to obtain 1# starch / thermoplastic polyurethane composite material. The aspect ratio of the single-screw extruder is 35:1, the extrusion temperature is 135~160°C, and the screw speed is 80r / min.
Embodiment 2
[0040] Example 2, 20 parts of cornstarch, 80 parts of TPU, 5 parts of glycerin, 3 parts of urea, 1 part of nano-calcium carbonate (the particle size is more than 5000 mesh), 5 parts of styrene-butadiene thermoplastic elastomer, 5 parts of methyl methacrylate-butadiene-styrene terpolymer, 0.5 part of Tween-200 after mixing evenly, join the twin-screw extruder, the length-to-diameter ratio of the extruder is 40:1, The extrusion temperature is 135~175°C, the screw speed is 200r / min, and the 2# starch / thermoplastic polyurethane composite material is prepared.
Embodiment 3
[0041] Embodiment 3, with 30 parts of cornstarch, 10 parts of sorbitol, 2 parts of formamide, 1 part of nano-titanium dioxide (the particle size mesh number is more than 5000 mesh), 8 parts of styrene-butadiene thermoplastic elastomer, styrene and 9 parts of isoprene-styrene block copolymer, 1 part of silane coupling agent are mixed evenly and then added to 70 parts of TPU respectively into twin-screw extrusion with diameter (Ф) 25 and aspect ratio (L / D) 35 extruder combined with a single-screw extruder with a diameter (Ф) of 45 and a length-to-diameter ratio (L / D) of 30 for continuous plasticizing and extruding in a second-stage extruder to obtain 3# starch / thermoplastic polyurethane composite material, in which the first-stage The barrel temperature of the twin-screw extruder is 80-175°C, the screw speed is 300r / min, the barrel temperature of the second-stage screw extruder is 175-185°C, and the screw speed is 150r / min.
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Abstract
Description
Claims
Application Information
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