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Method for compatibilizing PLA/PBAT alloy

A technology of alloy and compatibilizer, which is applied in the field of compatibilizing PLA/PBAT alloy, can solve problems such as unsatisfactory results, and achieve the effects of improving two-phase compatibility, reducing size, and better comprehensive performance

Inactive Publication Date: 2012-06-20
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After modification, the compatibility of the two has been improved to varying degrees, but still can not achieve satisfactory results

Method used

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  • Method for compatibilizing PLA/PBAT alloy
  • Method for compatibilizing PLA/PBAT alloy
  • Method for compatibilizing PLA/PBAT alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The dried PLA and PBAT resins were thoroughly mixed in a certain weight ratio, and then added to a Haake torque rheometer (Rheocord 90, HAAKE Mess-Technic GmbH, Germany) for melt blending. When the PLA / PBAT blend Immediately after melting started, a certain amount of PAPI was added to the molten blend. The mixing temperature is 170° C., the mixing time is 10 minutes, and the rotor speed is 50 rpm.

[0028] Use a flat vulcanizer (XLB-D, Zhejiang Huzhou Hongtu Machinery Co., Ltd.) to hot-press the prepared PLA / PBAT / PAPI blend at 170°C and 10MPa, preheating time is 10min, hot-pressing for 5min, cold-pressing 15min. The thickness of the film is around 200 μm (for infrared characterization), and the thickness of the flakes is 1 mm and 3 mm, respectively.

[0029] According to the infrared spectrum of the blend, at 1740cm -1 The absorption peak at corresponds to the stretching vibration peak of -CO; 1515, 1536cm -1 The absorption peak at corresponds to the -NH-C=O stretch...

Embodiment 2

[0033] A method for compatibilizing PLA / PBAT alloys, adding compatibilizer 4,4'-diphenylmethane diisocyanate (MDI) after melting PLA / PBAT alloys, and blending at 140°C for 60 minutes to obtain a modified blend material, the consumption of MDI is 90wt% of the total mass of PLA / PBAT.

Embodiment 3

[0035] A kind of method of compatibilization PLA / PBAT alloy, after PLA / PBAT alloy melting, add compatibilizer dicyclohexylmethane diisocyanate (H 12 MDI), blended at 220°C for 5min to obtain the modified blend, H 12 The amount of MDI is 0.001wt% of the total mass of PLA / PBAT.

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Abstract

The invention relates to a method for compatibilizing PLA / PBAT alloy. The method comprises the following steps of: after melting the PLA / PBAT alloy, adding a compatilizer into the PLA / PBAT alloy, and blending at 140-220 DEG C for 5-60 min to obtain modified blend, wherein the use amount of the compatilizer is 0.001-90 wt% of the total mass of the PLA / PBAT. Compared with the prior art, the method disclosed by the invention has the advantages of lowering surface tension, reducing dispersed phase size, greatly improving two-phase compatibility and the like.

Description

technical field [0001] The invention relates to a material and a method in the technical field of polymer materials, in particular to a method for compatibilizing PLA / PBAT alloys. Background technique [0002] With the rapid development of the national economy, the use of polymer materials has penetrated into all areas of people's lives, bringing great convenience to our lives. However, most commonly used polymer materials are difficult to biodegrade, which leads to serious environmental pollution problems, such as "white pollution". With people's high attention to environmental issues and the improvement of quality of life requirements, the development of fully biodegradable polymer materials has become a research hotspot at home and abroad. [0003] Polylactic acid (PLA) is an aliphatic polyester obtained by converting starch extracted from renewable plant resources such as corn and potatoes into glucose, which is fermented into lactic acid and further polymerized. The g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08K5/29C08G18/76C08G18/42
Inventor 袁角亮杨斌
Owner SHANGHAI JIAO TONG UNIV
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