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Polyhydroxy alkanoates graft polymer and preparation method thereof

A technology of polyhydroxyalkanoate and graft polymer, which is applied in the field of materials to achieve the effects of improving thermal stability, great practical value and economic value, and increasing biodegradation rate

Active Publication Date: 2013-03-06
山东省意可曼科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The Chinese patent with publication number CN1312305 uses radiation to graft isoprene onto polyhydroxybutyrate, which is composed of two phases of plastic phase polyhydroxybutyrate and rubber phase polyisoprene on the microcosm. It is to use the polyisoprene in the rubber phase to improve the toughness of polyhydroxybutyrate, and because of the existence of polyisoprene in the rubber phase, this modified polyhydroxybutyrate is only an improvement of its own toughness , and cannot be used as a compatibilizer to improve the compatibility with other inorganic filler materials or between polar components of polar blend materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Each group distribution ratio of the present embodiment is:

[0044] Polyhydroxybutyrate (PHB) 1000g

[0045] Maleic anhydride 10g

[0046] Di-tert-butyl peroxide 0.5g

[0047] The polyhydroxybutyrate (PHB) grafted polymers are prepared by four methods disclosed in the present invention respectively below.

[0048] method one:

[0049] Put PHB and maleic anhydride into a reaction kettle filled with 8L chlorobenzene solvent, gradually heat up to 90°C, pass carbon dioxide to exhaust the air, put in initiator di-tert-butyl peroxide, and finish the reaction after 3 hours of reaction. Filter, wash once with methanol, and then vacuum-dry at 40°C for 12 hours to obtain PHB grafted polymer particles.

[0050] Method Two:

[0051] Mix PHB, maleic anhydride and di-tert-butyl peroxide uniformly in a high-speed mixer, extrude on a twin-screw extruder, control the temperature of the melting section at 110°C, and control the screw speed at 10 rpm, and then pelletize , After dryin...

Embodiment 2

[0058] Each group distribution ratio of the present embodiment is:

[0059] PHBV 1000g

[0060] Fumaric Anhydride 25g

[0061] Dicumyl peroxide 3g

[0062] Antioxidant tetrakis-(4-hydroxy-3,5-tert-butylphenylpropionate) pentaerythritol ester 3g

[0063] Wherein, the molar content of comonomer 3-hydroxyvaleric acid (HV) in PHBV is 7%, and the graft polymer of polyhydroxybutyrate valerate (PHBV) is prepared by four methods disclosed in the present invention respectively.

[0064] method one:

[0065] Put PHBV, fumaric anhydride and antioxidant into a reaction kettle filled with 8L of chlorobenzene solvent, gradually raise the temperature to 70°C, pass nitrogen to exhaust the air, put in initiator dicumyl peroxide, and react for 3.5 hours Finish the reaction, filter, wash once with acetone, and then vacuum-dry at 50°C for 20 hours to obtain PHBV grafted polymer particles.

[0066] Method Two:

[0067] Mix PHBV, fumaric anhydride, dicumyl peroxide and antioxidants uniformly ...

Embodiment 3

[0074] Each group distribution ratio of the present embodiment is:

[0075] PHBH 1000g

[0076] Glycidyl methacrylate 35g

[0077] Styrene 15g

[0078] Azobisisoheptanonitrile 5g

[0079] Phenolic Antioxidants 1g

[0080] Phosphite Antioxidant 2g

[0081] Wherein, the molar content of the comonomer 3-hydroxyhexanoic acid (HH) in PHBH is 6%, and the PHBH graft polymer is prepared by four methods disclosed in the present invention respectively.

[0082] In this embodiment, the graft monomer is a composite graft monomer composed of glycidyl methacrylate and styrene, and the antioxidant is a composite antioxidant composed of phenolic antioxidants and phosphite antioxidants. oxidizing agent.

[0083] method one:

[0084] Put PHBH, glycidyl methacrylate, styrene and antioxidants into a reaction kettle filled with 8L of chloroform solvent, gradually raise the temperature to 140°C, blow nitrogen to exhaust the air, and put in the initiator azobisiso Heptanonitrile, reacted for...

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PUM

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Abstract

The invention discloses a polyhydroxy alkanoates graft polymer and a preparation method thereof; the polyhydroxy alkanoates graft polymer is prepared by the following ingredients by weight parts: 100 parts of polyhydroxy alkanoates, 01-15 parts of grafting monomer, 0-5 parts of initiator and 0-5 parts of antioxidants. The polyhydroxy alkanoates graft polymer changes the molecular structure of the polyhydroxy alkanoates, improves the heat stability thereof and further quickens the biological degrading ratio; in addition, the compatibility of the polyhydroxy alkanoates graft polymer and inorganic filling materials, such as CaCO3, talcum powder and the like and the polarity blending material is improved, and the polyhydroxy alkanoates graft polymer has high practical and economical values.

Description

【Technical field】 [0001] The invention relates to the field of materials, in particular to a graft modified product of polyhydroxyalkanoate and a preparation method thereof. 【Background technique】 [0002] Because traditional petroleum-based plastics are stable in nature and difficult to biodegrade, the traditional plastic industry consumes a large amount of petroleum energy and the "white pollution" has attracted more and more attention. Since the 1960s and 1970s, people have started the research and development of biodegradable plastics. At present, a variety of biodegradable materials (Biodegradable materials) have come out. After biodegradation, biodegradable materials become water and carbon dioxide. Harmful to the environment. Among them, common biodegradable polymer materials such as polyhydroxyalkanoate (PHAs), etc., are derived from natural renewable raw materials, have good performance, are widely used, and have good physical, mechanical properties, processing pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/02C08F2/06C08F2/02C08F2/46
Inventor 李敏张向南
Owner 山东省意可曼科技有限公司
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