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High-property polyhydroxyalkanoates (PHAs)/polybutylene succinate (PBS)/poly lactic acid (PLA) blend alloy

A high-performance, mixed-gold technology, applied in the field of materials, can solve the problems of low rigidity, poor toughness, and unsatisfactory mechanical properties, and achieve the effect of excellent comprehensive performance.

Active Publication Date: 2011-03-23
SHENZHEN ECOMANN BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disclosed as Chinese patent CN1470553A the preparation method of poly 3-hydroxyalkanoate / carbon dioxide-propylene oxide copolymer / starch blend, although the material it discloses has a wide range of processing, its rigidity is not high
For example, Chinese patent CN101205356 discloses a blend modification of polyhydroxyalkanoate and its copolymer and polylactic acid, and a material with better processing performance and toughness is obtained, but because the compatibility between the two is not very good, So the mechanical properties are not very ideal
And Chinese patent CN101045810A discloses a kind of toughening modification method of poly-β-hydroxybutyrate and poly-β-hydroxybutyrate-β-hydroxyvalerate, it has introduced poly-β-hydroxybutyrate and poly-β -Hydroxybutyrate-β-hydroxyvalerate blended with PBS or PLA to modify the dynamic cross-linking method, although the compatibility of PLA and PHAs has been improved to a certain extent, but because both are brittle materials, so Toughness is still poor
[0006] It can be seen that the current PHAs alloy materials are difficult to meet the conditions of high rigidity, high toughness and excellent processability at the same time.

Method used

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  • High-property polyhydroxyalkanoates (PHAs)/polybutylene succinate (PBS)/poly lactic acid (PLA) blend alloy
  • High-property polyhydroxyalkanoates (PHAs)/polybutylene succinate (PBS)/poly lactic acid (PLA) blend alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 50 parts of P3HB4HB (4HB molar content is 15%, weight average molecular weight is 1.2 million), 8.5 parts of PBS (molecular weight is 180,000), 40 parts of PLA (molecular weight is 250,000), 0.6 part of anti- Oxidizing agent tetrakis [methyl-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, 0.2 parts of paraffin wax, 0.5 parts of heat stabilizer zinc stearate and 0.2 parts of chain extender Weigh it in proportion and mix it in a high-speed mixer for 3 minutes, then pump the mixed material into a 50°C drying oven for 4 hours, and finally put it into a twin-screw extruder for extrusion to obtain a blended alloy material.

[0021] Under the same process, the mechanical properties of P3HB4HB / PBS / PLA alloy and P3HB4HB / PLA alloy are compared in Table 1.

[0022] Table 1

[0023] Alloy material category

Embodiment 2

[0025] Mix 64 parts of PHBV (HV molar content is 5%, molecular weight is 1.6 million) with 24 parts of PLA (molecular weight is 250,000), 10.1 parts of PBS (molecular weight is 180,000), 0.8 parts of antioxidant 3,5-di Tert-butyl-4-hydroxyphenyl propionate octadecanol ester, 0.5 part of lubricant erucamide, 0.6 part of heat stabilizer calcium stearate were weighed in proportion and put into a high-speed mixer and mixed for 4 minutes. Then the mixed material was pumped into a drying oven at 60° C. for drying for 3 hours, and finally put into a twin-screw extruder for extrusion.

[0026] Under the same process, the mechanical properties of PHBV / PBS / PLA alloy and PHBV / PLA alloy are compared in Table 2.

[0027] Table 2

[0028] Alloy material category

Embodiment 3

[0030] 40 parts of P3HB4HB (4HB molar content is 15%, molecular weight is 1.2 million) with 20 parts of PLA (molecular weight is 250,000) and 11.8 parts of PBS (molecular weight is 180,000), 26 parts of starch, 0.5 parts of antioxidant 2.6-di-tert-butyl-4-methylphenol and 0.7 part of antioxidant distearyl thiodipropionate, 0.3 part of lubricant paraffin and 0.5 part of lubricant erucamide, 0.2 part of antistatic agent Tetraalkylammonium salts, weighed in proportion and put into a high-speed mixer and mixed for 5 minutes, then pumped the mixed material into a drying oven at 70°C to dry for 4 hours, and finally put into a twin-screw extruder for extrusion , to obtain a blended alloy material.

[0031] Under the same process, the mechanical properties of P3HB4HB / PBS / PLA alloy and P3HB4HB / PLA alloy are compared in Table 3.

[0032] table 3

[0033]

[0034] 30% PHBH (3-glycolic acid HH molar content is 15%, weight average molecular weight is 1.2 million), 12.4% PBS (molecular w...

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Abstract

The invention discloses a high-property polyhydroxyalkanoates (PHAs) / polybutylene succinate (PBS) / poly lactic acid (PLA) blend alloy, which comprises PHAs as a body, PBS as a wild phase, PLA as a compatibilization phase, and other components. The blend alloy provided by the invention has higher compatibility and higher mechanical properties, and can be widely applied to film blowing products, blow molding products, extrusion products, injection molding products, foaming products and spinning products.

Description

technical field [0001] The invention relates to the field of materials, in particular to a fully biodegradable blended alloy material. Background technique [0002] The traditional plastic industry consumes a lot of petroleum energy and the "white pollution" has attracted more and more attention. Since the 1960s and 1970s, people have begun to research and develop biodegradable plastics. At present, there are A variety of synthetic biodegradable materials (Biodegradable materials) have come out, including polyhydroxyalkanoates (PHAs), polylactic acid (PLA), polycarbonate (PPC), polybutylene succinate (PBS), polycaprolactone Esters (PCL), etc. They are used as plastic materials and after biodegradation, become water and carbon dioxide and do not cause harm to the environment. At present, more studies on biodegradable plastics are concentrated on polylactic acid (PLA), polyhydroxyalkanoates (PHAs), and polybutylene succinate (PBS). [0003] Polyhydroxyalkanoates (PHAs) are ...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02
Inventor 李敏张向南
Owner SHENZHEN ECOMANN BIOTECH
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