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Bio-based compatilizer, preparation method and application thereof

A compatibilizer and bio-based technology, which is applied in the field of bio-based compatibilizer preparation, can solve problems such as the influence of hydrogen bond force by ambient temperature, easy migration or precipitation of phenolic compounds, and difficulty in controlling the degree of cross-linking

Inactive Publication Date: 2010-06-02
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the elongation at break and the strength at break have been improved to a certain extent, there are two reactions of crosslinking and degradation at the same time in the dynamic co-crosslinking in the internal mixer. Degradation will lead to a decrease in the molecular weight of the polymer and a decrease in mechanical properties; in addition, It is difficult to control the degree of cross-linking during the cross-linking process. If the cross-linking is too low, the mechanical properties will not be improved significantly. If the cross-linking is too high, it will easily form a gel, which will reduce the thermoplastic processing performance of the material.
Chinese patent ZL02156420.5 invented a method of adding phenolic compounds to PHB or PHBV to achieve toughness. Although the elongation at break can reach about 200%, it is only through the active phenolic hydroxyl groups on the phenolic compound molecules. The carbonyl group on the PHB or PHBV molecule undergoes hydrogen bond association to achieve the purpose of modification. It has certain defects, such as small molecule phenolic compounds are easy to migrate or precipitate, and the hydrogen bond force is affected by the ambient temperature.
[0006] The above patents or documents generally adopt physical methods, or directly add modifiers or compatibilizers to carry out blending modification. The purpose is to have toughening and modifying effects on PHB, PHBV, and PLA. research results, but also have methodological or application limitations

Method used

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  • Bio-based compatilizer, preparation method and application thereof
  • Bio-based compatilizer, preparation method and application thereof
  • Bio-based compatilizer, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Embodiment 1: the alcohol depolymerization of PHB

[0083] Weigh 50.0-1000.0g PHB resin (weight average molecular weight: 90,000), 0.5-8.0g p-toluenesulfonic acid, measure 0.5-5L ethylene glycol, pour the above materials into a three-necked flask or a reaction kettle, and nitrogen Protect. Heating in an oil bath with the temperature controlled at 170°C, stirring and reacting for 10 to 70 minutes, cooling at room temperature, and then using a sand core funnel to suction filter the degradation product (the filtrate can be recycled and reused), rinse with cold absolute ethanol several times, and put Vacuum-dry in a vacuum oven at 60°C for 6 hours to obtain white granular products with different molecular weights. Then take PHB with different weight average molecular weights (50,000, 80,000 and 140,000) to repeat the above test, and obtain the data in Table 1 below.

[0084] Table 1 The weight-average molecular weight (Mw) of phb in different reaction times

[0085]

Embodiment 2

[0086] Example 2: Alcohol depolymerization of PHBV

[0087] Weigh 50.0-1000.0g PHBV resin (weight average molecular weight is 120,000, HV% is 5%), 0.5-6.0g p-toluenesulfonic acid, measure 0.5-5L ethanol, pour the above materials into a three-necked flask or a reaction kettle , Nitrogen protection throughout the reaction. Heating in an oil bath with the temperature controlled at 175°C, stirring and reacting for 10 to 70 minutes, then cooling at room temperature, and then using a sand core funnel to suction filter the degradation product (the filtrate can be recycled and reused), rinse it with cold absolute ethanol several times, and put Vacuum-dry in a vacuum oven at 60°C for 6 hours to obtain white granular products with different molecular weights. Then take PHBV with different weight-average molecular weights (60,000, 90,000 and 150,000, HV% are 12%, 20% and 8% respectively) to repeat the above test, and obtain the following data in Table 2.

[0088] The weight-average mol...

Embodiment 3

[0090] Embodiment 3: the alcohol depolymerization of PLA

[0091]Weigh 50.0-1000.0g PLA resin (weight average molecular weight is 40,000, L% is 45%), 1.2-8.0g p-toluenesulfonic acid, measure 0.5-5L isopropanol, pour the above materials into a three-necked flask or react In the kettle, nitrogen protection was used throughout the reaction. Heating in an oil bath with the temperature controlled at 190°C, stirring and reacting for 10 to 70 minutes, cooling at room temperature, and then suction filtering the degradation product with a sand core funnel (the filtrate can be recycled and reused), rinsed several times with cold absolute ethanol, and put Vacuum-dry in a vacuum oven at 60°C for 6 hours to obtain white granular products with different molecular weights. Then take PLA with different weight-average molecular weights (60,000, 80,000 and 90,000, and the L% is 98%, 30% and 66% respectively) and repeat the above test to obtain the data in Table 3 below.

[0092] The weight-av...

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Abstract

The invention discloses a bio-based compatilizer, a preparation method and the application thereof. The preparation method comprises the following steps of: respectively alcohol depolymerization on poly3-hydroxy-butanoic acid ester (PHB), poly3-hydroxy-butanoic acid ester-3- hydroxyvalerate (PHBV), polylactic acid (PLA) and polybutylene succinate (PBS) to obtain 4 alcohol depolymerized products; and then reactively blending more than 2 products, certain amount of isocyanate and antioxidant for reacting to obtain different bio-based compatilizers. 2-20 parts of compatilizers are added into 10 parts of bio-based resin to prepare a composite material, which obviously improves the compatibility of system interface, greatly improves the overall properties and widens the application link of the bio-based resin. The composite material can be widely applied to the production or consume fields of automobile trims, stationery products, traffic road blocks, sport products, food bags, refuge bags, disposable table cloth, outdoor flower pots, lunch boxes, knives and forks and the like.

Description

technical field [0001] The invention relates to a preparation technology of a bio-based compatibilizer, in particular to a preparation method and application of a compatibilizer for improving the compatibility between bio-based resin materials. Background technique [0002] Poly(3-hydroxybutyrate) (PHB) and poly(3-hydroxybutyrate-3-hydroxyvalerate) (PHBV) are both bio-based resin materials produced by fermentation engineering technology. Its complete biodegradability, good biocompatibility, and high barrier properties make it widely used in medical materials (sutures, bone nails), film materials (mulch, shopping bags, compost bags), disposable tableware, packaging Materials, stationery and other aspects have a wide range of application prospects. However, the internal structure shows defects such as brittleness and easy fracture in performance, which greatly restricts the popularization and application of PHB and PHBV. Although high 3-hydroxyvalerate (HV) content (> 20m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91C08L67/04C08L67/02B29B9/12B29C47/92B29C48/92
Inventor 吴香发伍洋周坚蒋志强黎俊顾群
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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