Aliphatic polycarbonate alloy material
A technology of polycarbonate and alloy materials, applied in the direction of conjugated synthetic polymer artificial filaments, cellulose/protein conjugated artificial filaments, etc., can solve the problem of not fundamentally improving the heat resistance temperature of PPC and the high temperature of blended materials Poor performance, insufficient low temperature toughness and other problems, to improve compatibility and the interface of the two phases, increase thermal degradation temperature, and improve performance
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Embodiment 1
[0033] PPC was dried in a vacuum oven at 45-50°C for 24 hours, and CAB was dried in a vacuum oven at 80°C for 24 hours. PPC / CAB was weighed according to the mass ratio PPC / CAB=95g / 5g, mixed and stirred at room temperature and then added to the dense In the mixing machine, the temperature of the internal mixer is 190° C., the screw speed is set at 100 rpm, and the material is discharged after 5 minutes of internal mixing.
[0034] The above mixed sample was hot-pressed into a sheet with a thickness of 1mm in a hot press at 190°C, and the thermal stability was tested. Using the SII-TGA analyzer, in an air atmosphere, the heating rate was 20°C / min, and the temperature range was measured 50~550℃. see resultsfigure 1 The curve in (g)CAB / PPC=5 / 95.
Embodiment 2-7
[0036] PPC was dried in a vacuum oven at 45-50°C for 24 hours, CAB was dried in a vacuum oven at 80°C for 24 hours, and the samples were weighed according to the mass ratio of PPC / CAB shown in Table 1, mixed and stirred at room temperature and then added to the internal mixer In the process, the temperature of the internal mixer is 190°C, the screw speed is set at 100 rpm, and the material is discharged after 5 minutes of internal mixing.
[0037] The above-mentioned kneaded sample was hot-pressed into a sheet having a thickness of 1 mm in a hot press at 190° C., and various tests were performed.
[0038] The above-mentioned samples were tested for tensile properties, using dumbbell-shaped samples, and tested according to ASTM D412-80. The tensile testing machine was Tensilon UMT-300, the tensile speed was 10mm / min, and the tensile test conditions were temperature 23°C. The humidity is 50%, and the results are shown in Table 1.
[0039] In order to test the thermal stability ...
Embodiment 8
[0046] After PEC was dried in a vacuum oven at 35-40°C for 24 hours, and CAB was dried in a vacuum oven at 80°C for 24 hours, the PEC / CAB was weighed according to the mass ratio PPC / CAB=50g / 50g, mixed and stirred at room temperature and then added to the dense In the mixing machine, the temperature of the internal mixer is 190° C., the screw speed is set at 100 rpm, and the material is discharged after 5 minutes of internal mixing.
[0047] The above mixed sample was hot-pressed into a sheet with a thickness of 1mm in a hot press at 190°C, and the thermal stability was tested. Using the SII-TGA analyzer, in an air atmosphere, the heating rate was 20°C / min, and the temperature range was measured 50~550℃. The results showed that the maximum thermal degradation temperature of pure PEC was 220°C, and the maximum thermal degradation temperature of the blend increased significantly to 262°C.
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