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Blended foam material based on polycaprolactone (PCL) and modified polylactic acid (PLA) and preparation method thereof

A polycaprolactone and foaming material technology, applied in the field of foaming materials, can solve the problems of poor processing stability, poor impact strength, short service life, etc. The effect of improving the service life and improving the usability

Inactive Publication Date: 2012-12-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem: In order to solve the defects and deficiencies of the existing polylactic acid foam materials, such as poor toughness, poor impact strength, poor processing stability, high cost, and short service life, the invention provides a polycaprolactone Modified polylactic acid-based blended foaming material and preparation method thereof, the process is simple and feasible, and polylactic acid-based foaming material with excellent comprehensive performance and controllable density can be prepared economically and efficiently

Method used

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  • Blended foam material based on polycaprolactone (PCL) and modified polylactic acid (PLA) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The raw material components are by weight: 80 parts of poly DL-lactic acid with a weight average molecular weight of 150,000, 5 parts of polycaprolactone with a weight average molecular weight of 30,000, 5 parts of hollow glass microspheres, 3 parts of nano calcium carbonate, 4 parts of even Nitrogendiformamide, 0.1 part of zinc oxide, 2 parts of hydrotalcite, 0.9 part of sodium dodecylbenzenesulfonate. The molecular weight distribution Mw / Mn value of polyDL-lactic acid is 1.6, the melting point is 164°C, and the crystallinity is 35%; the melting point of polycaprolactone is 60°C, and the crystallinity is 45%.

[0032]According to the above formula, the fully dried raw materials are mixed evenly in a high mixer, then extruded with a twin-screw extruder at 155°C, and granulated with a pelletizer to prepare a length of 5-10mm and a particle size of about 5mm. foaming masterbatch; put a certain amount of foaming masterbatch in the mold, heat foam molding on a flat vulcaniz...

Embodiment 2

[0034] The raw material components are by weight: 70 parts of poly DL-lactic acid with a weight average molecular weight of 150,000, 15 parts of polycaprolactone with a weight average molecular weight of 30,000, 5 parts of hollow glass microspheres, 3 parts of nano calcium carbonate, 4 parts of even Nitrogendiformamide, 0.1 part of zinc oxide, 2 parts of hydrotalcite, 0.9 part of sodium dodecylbenzenesulfonate.

[0035] According to the above formula, the fully dried raw materials are mixed evenly in a high mixer, then extruded with a twin-screw extruder at 155°C, and granulated with a pelletizer to prepare a length of 5-10mm and a particle size of about 5mm. foaming masterbatch; put a certain amount of foaming masterbatch in the mold, heat and foam on a flat vulcanizing machine at 180°C, the foaming time is 15min, and the apparent density is 0.43 g / cm 3 A polycaprolactone-modified polylactic acid-based blend foam material.

Embodiment 3

[0037] The raw material components are by weight: 60 parts of poly DL-lactic acid with a weight average molecular weight of 150,000, 25 parts of polycaprolactone with a weight average molecular weight of 30,000, 5 parts of hollow glass microspheres, 3 parts of nano calcium carbonate, 4 parts of even Nitrogendiformamide, 0.1 part of zinc oxide, 2 parts of hydrotalcite, 0.9 part of sodium dodecylbenzenesulfonate.

[0038] According to the above formula, the fully dried raw materials are mixed evenly in a high mixer, then extruded with a twin-screw extruder at 155°C, and granulated with a pelletizer to prepare a length of 5-10mm and a particle size of about 5mm. foaming masterbatch; put a certain amount of foaming masterbatch in the mold, heat foam molding on a flat vulcanizing machine at 180 °C, the foaming time is 15min, and the apparent density is 0.42 g / cm 3 A polycaprolactone-modified polylactic acid-based blend foam material.

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Abstract

The invention discloses a blended foam material based on PLC and modified PLA and a preparation method thereof, and belongs to the foam material field. The foam material comprises, by weight, 60-90 parts of PLA, 1-25 parts of PCL, 2-10 parts of reinforcing agents, 1-3 parts of nanometer nucleating agents, 4 parts of foaming agents, 0.1-1 part of a blowing promoter, 1-3 parts of environment-friendly flame retardants and 0.5-1 part of a surfactant. According to the foam material and the preparation method thereof, composite foamed plastics with good mechanical properties and superior surface quality can be prepared.

Description

technical field [0001] The invention belongs to the field of foaming materials, and in particular relates to a polycaprolactone-modified polylactic acid-based blended foaming material and a preparation method thereof. Background technique [0002] The raw material of traditional plastics is petroleum, and the products are non-degradable and will cause serious pollution to the ecological environment. The raw materials of polylactic acid (PLA) are plants, and the products are biodegradable, environmentally friendly and save petroleum resources. Polylactic acid products have been widely used in medical plastics such as artificial bones; instead of ordinary plastics, they are used in short-term use products, such as garbage bags, disposable packaging supplies, daily necessities, etc.; in recent years, they have replaced engineering plastics in long-term use products, such as automobiles products, home improvement products, etc. trends. [0003] At present, the main factors rest...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K13/04C08K7/14C08K7/06C08K7/28C08K3/34C08K3/22C08K3/36C08K3/26C08J9/06B29C47/92B29C48/92
CPCB29B7/46B29B7/72B29B7/7461B29B7/90B29B9/06B29B9/12B29B9/14B29C48/04B29C48/40B29C48/92B29C2948/92704B29C2948/92895C08J9/0061C08J9/06C08J2367/04C08J2467/04C08K7/14C08L67/04C09K21/00
Inventor 姚正军姚芮周金堂魏东博周畅郑文建陈永鑫
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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