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Phosphonitrile/triazine double-group molecular synergistic flame retardation polylactic acid composite material and preparation method thereof

A composite material and synergistic flame-retardant technology, which is applied in the field of phosphazene/triazine biradical molecular synergistic flame-retardant polylactic acid composite materials and its preparation, can solve the problems of rapid degradation of polylactic acid, reduction of mechanical properties of polylactic acid matrix, and limitations Material application fields and other issues, to achieve the effect of high oxygen index and good anti-droplet effect

Active Publication Date: 2016-09-28
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem is that the addition of graphite interlayer compounds will greatly reduce the mechanical properties of the PLA matrix, and the addition of black graphite will greatly limit the application of the material. In addition, the catalytic components and strong acids between graphite layers will lead to polylactic acid matrix. Rapid degradation during use of lactic acid
A few synergists with catalytic effect can reduce the addition of flame retardant to 10%, but the problem is that the catalyst is easy to cause degradation of polylactic acid
Moreover, there is no relevant report about the phosphazene / triazine diradical molecular synergist in the existing research on flame-retardant polylactic acid.

Method used

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  • Phosphonitrile/triazine double-group molecular synergistic flame retardation polylactic acid composite material and preparation method thereof
  • Phosphonitrile/triazine double-group molecular synergistic flame retardation polylactic acid composite material and preparation method thereof
  • Phosphonitrile/triazine double-group molecular synergistic flame retardation polylactic acid composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 75 parts of high-molecular-weight polylactic acid with a viscosity average molecular weight of more than 100,000, 12.5 parts of phosphazene / triazine double-base molecular synergist A1 (R in the structural formula of A1 is hexamethylenediamine group), 12.5 parts of ammonium polyphosphate (ammonium polyphosphate, abbreviated The word is APP) 12.5 parts, antioxidant 0.03 parts are premixed and placed in a torque rheometer at 170 ° C for mixing to obtain a flame-retardant polylactic acid composite material PLA-1. The flame retardancy of the composite material is as follows: LOI is 40.8%; it passes the UL94V-0 level test.

Embodiment 2

[0023] 75 parts of high-molecular-weight polylactic acid with a viscosity-average molecular weight of more than 100,000, 18.75 parts of phosphazene / triazine double-base molecular synergist A1 (R in the A1 structural formula is a hexamethylenediamine group), 6.25 parts of melamine polyphosphate, and antioxidant After premixing 0.04 parts of the agent, place it in a torque rheometer at 230°C for kneading to obtain the flame-retardant polylactic acid composite material PLA-2. The flame retardancy of the composite material is as follows: LOI is 41.3%; it passes the UL94V-0 level test.

Embodiment 3

[0025] 80 parts of high-molecular-weight polylactic acid with a viscosity-average molecular weight of more than 100,000, 15 parts of phosphazene / triazine double-base molecular synergist A2 (R in the A2 structural formula is p-phenylenediamine group), 5 parts of ammonium polyphosphate (APP) Parts, 0.03 parts of antioxidant pre-mixed and placed in a torque rheometer at 220 ° C for mixing to obtain flame-retardant polylactic acid composite material PLA-3. The flame retardancy of the composite material is: LOI is 39.5%; it passes the UL94V-0 level test. Example 4.

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Abstract

The invention discloses a phosphonitrile / triazine double-group molecular synergistic flame retardation polylactic acid composite material. The phosphonitrile / triazine double-group molecular synergistic flame retardation polylactic acid composite material comprises, by weight, 75-90 parts of polylactic acid resin, 25-10 parts of a phosphorus flame retardant and a phosphonitrile / triazine double-group molecular synergist, and 0.03-0.1 parts of an antioxidant, wherein a weight ratio of the phosphorus flame retardant to the phosphonitrile / triazine double-group molecular synergist is 1-3:3-1. The phosphonitrile / triazine double-group molecular synergistic flame retardation polylactic acid composite material is obtained through the following steps: pre-mixing above components in proportion, and carrying out melt blending at 170-230DEG C. The flame retardation polylactic acid composite material has the characteristics of high anti-droplet effect and high oxygen index; and when the addition amount of the flame retardant is low (10%), the oxygen index still keeps at 30% or above and the composite material can reach vertical burning UL94V0 grade.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a phosphazene / triazine double-radical molecular synergistic flame-retardant polylactic acid composite material and a preparation method thereof. Background technique [0002] With the enhancement of people's awareness of environmental protection and the intensification of energy crisis, the research, development and application of bio-based materials and biodegradable materials have been paid more and more attention by people. Polylactic acid (PLA) is derived from renewable cornstarch and can be completely degraded into water and carbon dioxide in nature. It also has the advantages of high stiffness and strength, easy processing, strong plasticity, and good biocompatibility. Known as the most promising "green plastic". At present, polylactic acid has been able to carry out various molding processes, and has been increasingly widely used in fields such as textiles, pack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K5/5399C08K3/32C08K5/52
CPCC08K3/32C08K5/5205C08K5/5399C08K2003/323C08K2003/329C08L2201/02C08L67/04
Inventor 陈雅君王伟钱立军
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
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