Biodegradable film containing aliphatic polycarbonate and preparation method thereof

A polycarbonate, biodegradable technology, used in flat products, other household appliances, applications, etc., can solve the problems of large gap in impact resistance performance, poor mechanical properties, difficult to large-scale application, etc., to improve impact resistance. , The effect of inhibiting thermal decomposition and the price is acceptable

Inactive Publication Date: 2010-10-13
NANTONG HUASHENG PLASTIC PRODS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fully biodegradable films prepared by these methods have the defects of low heat resistance and poor mechanical properties
Chinese patent CN200610130556.8 can prepare a biodegradable film with good heat resistance and flexibility by using 45-85% polylactic acid and 10-50% aliphatic polyester, but no specific data is given
Usually, the fully biodegradable film prepared with aliphatic polyester as the matrix and polylactic acid lacks good toughness (CN02801476.6), and the impact resistance performance is far from that of the commercially available polyethylene-based film. , it is also difficult to apply on a large scale

Method used

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  • Biodegradable film containing aliphatic polycarbonate and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Get the number-average molecular weight and be 118,000g / mol, the polypropylene carbonate 60kg that the molecular weight distribution is 4.14, the number-average molecular weight is 60,000g / mol, the polybutylene succinate 40kg that the molecular weight distribution is 2.75, the number-average molecular weight is 50,000 -250,000g / mol and melting point 150°C copolymerized nylon 5kg, PEG-400 5kg, maleic anhydride 1kg, common grade silica 3kg, pre-mixed in a high-speed mixer for 5 minutes, and then added a twin-screw with an aspect ratio of 20 Blending in an extruder, granulation with water-cooled strands, air-drying the resulting blended material at 70°C until the moisture content is less than 0.1%, and blowing the film with a single screw with a blow-up ratio of 2.5 to obtain a film with a thickness of 0.05mm. The mechanical properties are shown in Table 1.

Embodiment 2

[0028] Get number-average molecular weight and be 210,000g / mol, the polypropylene carbonate 40kg that molecular weight distribution is 2.87, the number-average molecular weight is 75,000g / mol, the polybutylene succinate 60kg that molecular weight distribution is 4.4, number-average molecular weight is 50,000 -250,000g / mol and melting point 150°C copolymerized nylon 8kg, diallyl phthalate 1.5kg, phthalic anhydride 1kg, kg zinc stearate 1kg, nano calcium carbonate 5kg, nano white carbon black 3kg , premixed in a high-speed mixer for 7 minutes, then added to a twin-screw extruder with an aspect ratio of 42 for blending, and granulated with water-cooled strands. The resulting blended material was air-dried at 80°C until the moisture content was less than 0.1%. , using a single-screw blown film, the blow-up ratio: 4.5, and the thickness of the film is 0.020mm. The mechanical properties are shown in Table 1.

Embodiment 3

[0030] Get the number average molecular weight and be 78,000g / mol, the polypropylene carbonate 55kg that the molecular weight distribution is 5.22, the number average molecular weight is 60,000g / mol, the PBS 45kg that the molecular weight distribution is 2.75, ethylene-acrylic acid copolymer (EAA) 5kg, o-phthalic Diallyl diformate 3kg, calcium stearate 1kg, polycarbodiimide 1kg, ordinary grade calcium carbonate 20kg, premixed in a high-speed mixer for 3 minutes, and then added to a twin-screw extruder with an aspect ratio of 42 Co-blending, underwater pelletizing, air-drying the obtained blended material at 50°C until the moisture content is less than 0.1%, using single-screw blown film, blowing ratio: 3.5, and making a film with a thickness of 0.025mm. The mechanical properties are shown in Table 1.

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Abstract

The invention, which belongs to the technical field of biodegradable films, relates to a biodegradable film containing aliphatic polycarbonate. The biodegradable film is characterized in that the biodegradable film consists of the following components in part by weight: 30 to 60 parts of polycarbonate1, 2-malonic ester; 40 to 70 parts of one or the mixture of poly(butanediol succinate) and poly(butanediol succinate / adipate) copolyester; 5 to 15 parts of toughening agent; 0.5 to 5 parts of plasticizer; 0.5 to 3 parts of heat stabilizer; and 1 to 40 parts of inorganic filler. The prepared film is biodegradable, and can be directly contacted with food. By adding the heat stabilizer, the thermolysis of bend is inhibited, so that the processing temperature of the film can be increased to 190 DEG C; by adding the toughening agent and the plasticizer, the impact resistance of the finished film product is enhanced, the maximum dart drop impact on the film with the thickness of 20Mum can be up to 130g, the tensile strength is higher than 50MPa, the elongation at break is higher than 600 percent, and therefore the film can fully meet the requirements of ordinary packaging materials.

Description

technical field [0001] The invention belongs to the technical field of biodegradable films, in particular to a polybutylene succinate (PBS) or polytetramethylene glycol-butylene dicarbonate (PPC) based film Acid / adipic acid copolyester (PBSA) is a reinforced resin, a biodegradable film whose thermal and mechanical properties are improved by adding a toughening agent, a plasticizer and a stabilizer, and a preparation method thereof. technical background [0002] Packaging bags, garbage bags, agricultural mulch and other products are widely used disposable plastic products. At present, the products on the market are mainly made of polyethylene (PE), polyvinyl chloride (PVC) and polypropylene (PP). The use of biodegradable plastics to prepare such products is an important way to solve white pollution. [0003] The existing so-called degradable films are mainly starch-modified materials, which generally still contain a certain amount of non-degradable materials such as polyethy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L67/02C08L77/00C08L23/08C08L33/02C08L75/04C08L33/08C08L71/08C08L67/00C08K13/02C08K5/103C08K5/12C08K5/11C08K5/29C08K5/09C08K5/098C08K3/36C08K3/26C08K3/34B29D7/01B29C55/28
Inventor 张春华周庆海高凤翔王献红王佛松冯爱华
Owner NANTONG HUASHENG PLASTIC PRODS
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