Biodegradable material containing aliphatic polycarbonate, and preparation method and application thereof

A biodegradable material, aliphatic polyester technology, applied in the application field of preparing biodegradable films, can solve the problems of low glass transition temperature and melt strength, low film tear strength, low processing temperature, etc. Thermal and process stability properties, ease of large-scale industrial production, high toughness and tear strength effects

Active Publication Date: 2013-01-16
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aliphatic polycarbonate is currently researched more polypropylene carbonate is prepared by carbon dioxide / epoxy regulation copolymerization method, but due to the limitation of the specific structure of epoxy (mostly limited to propylene oxide) prepared polypropylene carbonate Propylene carbonate is amorphous, and the glass transition temperature and thermal decomposition temperature are low, which seriously affects the processing performance, thermal stability and mechanical properties of this type of polycarbonate
Chinese patents CN 101402789 and CN 101857718 disclose methods for preparing biodegradable films by blending blow molding of polypropylene carbonate, polybutylene succinate, polyadipate/butylene succinate copolyester, etc. However, the tear strength of the film produced by this method is not high, the tensile s

Method used

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  • Biodegradable material containing aliphatic polycarbonate, and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Based on the parts by weight of polybutylene carbonate after drying. 18 parts by weight of polybutylene carbonate after drying, 72 parts by weight of polylactic acid (Natureworks 2002D), 10 parts by weight of ethylene-methacrylic acid sodium salt copolymer (DuPont Surlyn 1605), polyethylene glycol (PEG-400) 2 parts by weight, 0.3 parts by weight of erucamide, 0.3 parts by weight of stearic acid and 0.1 part by weight of sorbitol were premixed in a high-speed mixer for 30 minutes; after mixing well, 0.01 parts by weight of dicumyl peroxide (DCP) was added part, 0.1 part by weight of triallyl isocyanurate and continue mixing for 5 minutes to obtain a mixed material; the mixed material is added to a twin-screw extruder with a length-to-diameter ratio of 40:1, and the temperature is Melt blending at 150-190°C, air-cooled, stretched into strips, and pelletized; vacuum-dried and dewatered the obtained granular mixed resin slices to obtain biodegradable materials containing al...

Embodiment 2

[0042] Based on the parts by weight of polybutylene carbonate after drying. After drying, 17 parts by weight of polybutylene carbonate (PBC), 8.5 parts by weight of polyhexamethylene carbonate (PHC), 59.5 parts by weight of polylactic acid (Natureworks 4032D), ethylene-methyl methacrylate copolymer (Sumitomo WH303 ) 15 parts by weight, 1 part by weight of polyethylene glycol (PEG-1000), 0.3 parts by weight of erucamide, 0.3 parts by weight of calcium stearate and 0.1 parts by weight of silicon dioxide, premixed in a high-speed mixer for 30 minutes; After fully mixing evenly, add 0.1 parts by weight of dicumyl peroxide (DCP) and 0.05 parts by weight of triallyl isocyanurate and continue mixing for 5 minutes to obtain a mixed material; add the mixed material In a twin-screw extruder with a length-to-diameter ratio of 40:1, melt blending is carried out at a temperature of 150-190°C, stretched into strips by air cooling, and pelletized; the obtained granular mixed resin slices are...

Embodiment 3

[0045] Based on the parts by weight of the dried polypentamethylene carbonate. After drying, 38 parts by weight of polypentamethylene carbonate (PPMC), 57 parts by weight of polylactic acid (Natureworks 4032D), 5 parts by weight of ethylene-methacrylic acid sodium salt copolymer (DuPont Surlyn 1605), polyethylene glycol (PEG -1000) 1 part by weight, 0.3 part by weight of erucamide, 0.3 part by weight of stearic acid and 0.1 part by weight of silicon dioxide, pre-mixed in a high-speed mixer for 30 minutes; after fully mixing, add diisopropyl peroxide 0.1 parts by weight of benzene (DCP) and 0.3 parts by weight of triallyl isocyanurate were mixed for 5 minutes to obtain a mixed material; the mixed material was added to a twin-screw extruder with an aspect ratio of 40:1 In the machine, melt blending is carried out at a temperature of 150-190 ° C, and air-cooled stretching is used to form strips and pelletized; the obtained granular mixed resin chips are vacuum-dried to remove wat...

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Abstract

The invention relates to a biodegradable material containing aliphatic polycarbonate, and a preparation method and an application thereof. The biodegradable material is obtained by the following steps of mixing 20-90 parts by weight of aliphatic polycarbonate, 10-80 parts by weight of aliphatic polyester, 0.01-1 part by weight of an organic peroxide, 0.05-1 part by weight of a cross-linking agent, 3-15 parts by weight of a compatilizer, 0.3-5 parts by weight of a plasticizer, 0.1-5 parts by weight of a heat stabilizer and 0.01-1 part by weight of an auxiliary agent uniformly; adding the above mixture in a double-screw extruder for melt blending, stretching the blended mixture into strips; pelletizing the strips to obtain granular mixing resin slices; and vacuum drying the slices and removing water from the slices. The biodegradable material can be used for preparing completely biodegradable film which has various excellent performances of conventional films, can keep relatively good transparency, has relatively high tensile strength, can provide high toughness and tearing strength, and has good thermal stability, etc.

Description

technical field [0001] The invention relates to the field of biodegradable materials, in particular to a biodegradable material containing aliphatic polycarbonate, a preparation method thereof, and an application of the biodegradable material in preparing a biodegradable film. Background technique [0002] In order to solve the "white pollution" problem caused by plastic products, the use of environmentally friendly and fully biodegradable polymers to replace traditional petroleum-based plastics has become a current research and development hotspot. [0003] Aliphatic polycarbonate is a new class of completely biodegradable and surface-erodible materials with good mechanical processing properties. The improvement of its performance can make the aliphatic polycarbonate have a wide range of physical, chemical and biological properties, and can be well applied in disposable packaging materials, medical materials, mulching films, etc. [0004] Aliphatic polycarbonate is current...

Claims

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Application Information

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IPC IPC(8): C08L69/00C08L67/04C08L23/08C08K13/02C08K5/00C08K5/14C08K5/3492C08K5/103C08K5/12B29D7/01B29C55/28
Inventor 肖耀南李春成朱文祥张栋管国虎郑柳春
Owner INST OF CHEM CHINESE ACAD OF SCI
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