A kind of biodegradable composition and preparation method thereof
A technology of biodegradation and composition, applied in the direction of conjugated synthetic polymer rayon, rayon manufacturing, fiber chemical characteristics, etc., can solve the problems of deterioration of physical properties, high processing requirements, reduced molecular weight, etc., and achieve hydrolysis resistance. and heat-resistant oxygen performance improvement effect
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[0035] Example 1
[0036] Weigh the components according to the following weight percentages:
[0037] Polylactic acid (PLA) 55
[0038] Poly(butylene adipate co-butylene terephthalate) (PBAT) 43
[0039] Benzoyl peroxide 2
[0040] Put the weighed composition into a high-mixer according to the above proportion, stir at low speed for 5 minutes, then stir at high speed for 3 minutes, mix well and add to the twin-screw extruder. The diameter of the extruder is 65mm and the length is 65mm. The diameter ratio is 36:1, with 9 heating zones and a vacuum exhaust device. The following operating conditions are selected for the extrusion process:
[0041] Temperature setting: 80 / 150 / 190 / 190 / 190 / 190 / 190 / 190 / 170
[0042] Feeding speed: 100KG / H
[0043] Screw speed: 300RPM
[0044] Vacuum pressure: 0.4 atmosphere
[0045] After the extrudate of the extruder is made into pellets by underwater hot cutting, it is dried in a desiccant dryer at 80 degrees for 2 hours to obtain the composition. According to ...
Example Embodiment
[0046] Example 2
[0047] Weigh the components according to the following weight percentages:
[0048] Poly 3-hydroxybutyric acid (PHB) 40
[0049] Poly(butylene succinate co-butylene adipate) (PBSA) 57
[0050] Di-tert-butylperoxy dicumyl 3
[0051] Put the weighed composition into a high-mixer according to the above proportion, stir at low speed for 5 minutes, then stir at high speed for 3 minutes, mix well and add to the twin-screw extruder. The diameter of the extruder is 65mm and the length is 65mm. The diameter ratio is 36:1, with 9 heating zones and a vacuum exhaust device. The following operating conditions are selected for the extrusion process:
[0052] Temperature setting: 80 / 150 / 190 / 190 / 190 / 190 / 190 / 190 / 170
[0053] Feeding speed: 100KG / H
[0054] Screw speed: 300RPM
[0055] Vacuum pressure: 0.4 atmosphere
[0056] After the extruded material of the extruder is formed into pellets by underwater heat cutting, it is dried in a desiccant dryer at 80 degrees for 2 hours to obtain ...
Example Embodiment
[0057] Example 3
[0058] Weigh the components according to the following weight percentages:
[0059] Polycaprolactone (PCL) 65
[0060] Polybutylene succinate (PBS) 34
[0061] 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane 1
[0062] Put the weighed composition into a high-mixer according to the above proportion, stir at low speed for 5 minutes, then stir at high speed for 3 minutes, mix well and add to the twin-screw extruder. The diameter of the extruder is 65mm and the length is 65mm. The diameter ratio is 36:1, with 9 heating zones and a vacuum exhaust device. The following operating conditions are selected for the extrusion process:
[0063] Temperature setting: 80 / 150 / 190 / 190 / 190 / 190 / 190 / 190 / 170
[0064] Feeding speed: 100KG / H
[0065] Screw speed: 300RPM
[0066] Vacuum pressure: 0.4 atmosphere
[0067] After the extrudate of the extruder is made into pellets by underwater hot cutting, it is dried in a desiccant dryer at 80 degrees for 2 hours to obtain the composition. A...
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