PPC/PLA/PBAT blend modified biodegradable resin prepared with chain extender and preparation method thereof

A biodegradable resin, blending modification technology, applied in the field of degradable plastics, can solve the problems of outstanding compatibility, poor compatibility, good toughness, etc., to achieve toughness, resin toughness, and compatibility. Effect

Inactive Publication Date: 2019-03-29
NANJING WURUI BIODEGRADABLE NEW MATERIAL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PPC has a low softening point, only 33-35°C, but good toughness; PLA has a softening point of 58°C, good rigidity, but poor toughness; the properties of the two are complementary, and PPC modified PLA is an ideal material, but they are extremely compatible. Difference
If the two are blended with PBAT, the complementarity is also very strong, but the compatibility is still an outstanding problem

Method used

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  • PPC/PLA/PBAT blend modified biodegradable resin prepared with chain extender and preparation method thereof
  • PPC/PLA/PBAT blend modified biodegradable resin prepared with chain extender and preparation method thereof
  • PPC/PLA/PBAT blend modified biodegradable resin prepared with chain extender and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This adopts chain extender to prepare the method for PPC / PLA / PBAT blending modified biodegradable resin, and its steps comprise:

[0031] (1) Add 0.7% of the chain extender KL-E 4370 (Shanxi Research Institute of Chemical Industry) to double the mass of ethyl acetate solution, stir to dissolve it;

[0032] (2) Mix PPC granules and PBAT granules, send the mixed granules into a twin-screw extrusion granulator, and through twin-screw high-temperature, high-shear, co-extrusion into strips, air-cooled and sent to the cutting Pellet machine cold cut to make PPC / PBAT blended modified biodegradable resin particles; wherein 30 parts of PPC were purchased from Henan Tianguan Enterprise Group Co., Ltd.; 70 parts of PBAT were 1024 of Guangzhou Kingfa Technology Co., Ltd.; twin-screw The extrusion temperature is 120°C, the screw rotation speed is 300r / min, and the granulation capacity is 250kg / h;

[0033] (3), after mixing 60 parts of PPC / PBAT blended modified biodegradable resin p...

Embodiment 2

[0038] This adopts chain extender to prepare the method for PPC / PLA / PBAT blending modified biodegradable resin, and its steps comprise:

[0039] (1) Add 0.7% of the chain extender KL-E 4370 (Shanxi Research Institute of Chemical Industry) to double the mass of ethyl acetate solution, stir to dissolve it;

[0040] (2), take the dried PPC granules and PBAT granules to mix, and the mixed granules are sent into a twin-screw extrusion granulator, and are extruded into strips at high temperature and high shear of the twin-screws, blended and extruded into strips and exit the die, and the air Cold delivery to the pelletizer for cold cutting to make PPC / PBAT blended modified biodegradable resin particles; 30 parts of PPC were purchased from Henan Tianguan Enterprise Group Co., Ltd., and 70 parts of PBAT were 1024 parts of Guangzhou Kingfa Technology Co., Ltd. , the twin-screw extrusion temperature is 110°C, the screw rotation speed is 300r / min, and the granulation capacity is 250kg / h;...

Embodiment 3

[0046] This adopts chain extender to prepare the method for PPC / PLA / PBAT blending modified biodegradable resin, and its steps comprise:

[0047] (1) Add 0.7% of the chain extender KL-E 4370 (Shanxi Research Institute of Chemical Industry) to double the mass of ethyl acetate solution, stir to dissolve it;

[0048] (2) Mix PPC granules and PBAT granules, send the mixed granules into a twin-screw extrusion granulator, and through twin-screw high-temperature, high-shear, co-extrusion into strips, air-cooled and sent to the cutting Pellet machine cold cut to make PPC / PBAT blended modified biodegradable resin particles; among them, 30 parts of PPC were purchased from Henan Tianguan Enterprise Group Co., Ltd., and 70 parts of PBAT were 1024 of Guangzhou Kingfa Technology Co., Ltd., twin-screw The extrusion temperature is 135°C, the screw rotation speed is 300r / min, and the granulation capacity is 250kg / h;

[0049] (3), after mixing 55 parts of PPC / PBAT blended modified biodegradable...

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Abstract

The invention discloses a PPC/PLA/PBAT blend modified biodegradable resin prepared with a chain extender. The PPC/PLA/PBAT blend modified biodegradable resin is prepared from the following raw materials by weight: 25-30 parts of PPC; 40-50 parts of PLA; 25-30 parts of PBAT; and 0.3-0.8 part of a chain extender KL-E. The invention also discloses a preparation method of the resin. The chain extenderis added during blending to play a modification role during chain extension, thus improving the material compatibility. The method adopts a two-step process, firstly PPC and PBAT are subjected to blending granulation in a twin-screw extrusion granulator, then the obtained blend is mixed with PLA particles, the chain extender KL-E is dissolved into an ethyl acetate solution, by means of spraying,the chain extender KL-E can be evenly distributed in the mixed particles of PLA and PPC/PBAT and increase the compatibility of the three, the small chain molecules and free molecules in the three canbe extended into macromolecular materials, thus eliminating the disadvantage of easy hydrolysis of aliphatic resin structurally, at the same time enhancing the melt strength of the three, and guaranteeing the processing stability.

Description

technical field [0001] The invention relates to a PPC / PLA / PBAT blended modified biodegradable resin prepared by using a chain extender and a preparation method thereof, belonging to the field of degradable plastics. Background technique [0002] Polypropylene carbonate (PPC), also known as polymethylethylene carbonate, is a completely degradable and environmentally friendly plastic synthesized from carbon dioxide and propylene oxide. [0003] Polylactic acid (PLA) is a new type of bio-based and renewable biodegradable material, which is made of starch raw materials extracted from renewable plant resources. The starch raw material is saccharified to obtain glucose, and then fermented by glucose and certain strains to produce high-purity lactic acid, and then synthesize polylactic acid with a certain molecular weight by chemical synthesis. PLA has good biodegradability. After use, it can be completely degraded by microorganisms in nature under specific conditions, and finally...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L69/00C08L63/00C08J5/18
CPCC08J5/18C08J2367/04C08J2463/00C08J2467/02C08J2469/00
Inventor 王庭慰
Owner NANJING WURUI BIODEGRADABLE NEW MATERIAL RES INST CO LTD
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