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A method for preparing high toughness polymer blend alloy by melt blending

A technology of melt blending and polymer, which is applied in the field of preparation of high-toughness polymer blend alloys, can solve the problems of unstable physical and mechanical properties, limited improvement of impact strength, and easy phase separation of products, so as to achieve toughness Good, impact performance improvement, good toughness effect

Active Publication Date: 2016-06-22
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the performance of bisphenol A polycarbonate, it can be compounded with some inorganic fillers, such as silicon dioxide, zinc oxide, montmorillonite, carbon nanotubes, carbon black, clay, etc., so that the mechanical properties, electrical properties Performance, thermal properties, etc. are improved, but this often depends on the dispersion of nanofillers and the interaction with the matrix, so the improvement in impact strength is relatively limited
Blending with another polymer is also a favorable means to improve the impact toughness of bisphenol A polycarbonate, which can improve the impact resistance of the material; but the physical and mechanical properties of the simple blend material are unstable, and the product is prone to phase separation , low temperature impact resistance is poor

Method used

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  • A method for preparing high toughness polymer blend alloy by melt blending
  • A method for preparing high toughness polymer blend alloy by melt blending
  • A method for preparing high toughness polymer blend alloy by melt blending

Examples

Experimental program
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Effect test

Embodiment 1

[0023] A method for preparing a high-toughness polymer blend alloy by melt blending, the steps of which are:

[0024] A, masterbatch preparation: carbon nanotubes and bisphenol A type polycarbonate are carried out melt blending by the mass ratio of 20:100, make masterbatch after cooling and solidifying;

[0025] The technological conditions of melt blending are: the temperature is 260°C, and the blending time is 20min.

[0026] The carbon nanotubes in this example are single-walled carbon nanotubes with a diameter of 50 nm and a length of 100 nm.

[0027] B. Alloy preparation: melt blend bisphenol A polycarbonate, polylactic acid, maleic anhydride grafted ethylene-octene copolymer (compatibilizer) and masterbatch at a mass ratio of 75:15:7.5:2.5 , obtained after cooling and solidification.

[0028] The technological conditions of melt blending are: the temperature is 260° C., and the blending time is 10 min.

[0029] In order to prove the synergistic toughening effect of ca...

Embodiment 2

[0035] A method for preparing a high-toughness polymer blend alloy by melt blending, the steps are:

[0036] A, masterbatch preparation: carbon nanotubes and bisphenol A type polycarbonate are carried out melt blending by the mass ratio of 20:100, make masterbatch after cooling and solidifying;

[0037] The technological conditions of melt blending are: the temperature is 260°C, and the blending time is 20min.

[0038] The carbon nanotubes in this example are single-walled carbon nanotubes with a diameter of 50 nm and a length of 100 nm.

[0039] B. Alloy preparation: melt blend bisphenol A polycarbonate, polylactic acid, maleic anhydride grafted ethylene-octene copolymer (compatibilizer) and masterbatch at a mass ratio of 75:15:5:5 , obtained after cooling and solidification.

[0040] The technological conditions of melt blending are: the temperature is 260° C., and the blending time is 10 min.

Embodiment 3

[0042] A method for preparing a high-toughness polymer blend alloy by melt blending, the steps are:

[0043]A, masterbatch preparation: carbon nanotubes and bisphenol A polycarbonate are melt-blended at a mass ratio of 1:100, cooled and solidified to obtain a masterbatch;

[0044] The technological conditions of melt blending are: the temperature is 260℃, and the blending time is 20min.

[0045] The carbon nanotubes in this example are single-walled carbon nanotubes with a diameter of 0.5 nm and a length of 100 nm.

[0046] B. Alloy preparation: melt blend bisphenol A polycarbonate, polylactic acid, maleic anhydride grafted ethylene-octene copolymer (compatibilizer) and masterbatch at a mass ratio of 75:15:5:3 , obtained after cooling and solidification.

[0047] The technological conditions of melt blending are: the temperature is 260° C., and the blending time is 10 min.

[0048] Figure 2a It is a histogram of room temperature impact properties of the polymer blend allo...

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Abstract

A method for preparing a high-toughness polymer blend alloy by melt blending, the steps are: A, masterbatch preparation: melting carbon nanotubes and bisphenol A polycarbonate at a mass ratio of 1-20:100 Blending, cooling and solidification to obtain a masterbatch; B, alloy preparation: bisphenol A polycarbonate, modified polymer, compatibilizer and masterbatch according to 40-75:15-45:1-10:1 Melt blending at a mass ratio of -5, obtained after cooling and solidification; wherein the modified polymer is one of ABS engineering plastics, polylactic acid, and polyolefin polymers; the compatibilizer is capable of promoting bisphenol A type Compatibilizer for polycarbonate and modified polymer combinations. The high toughness polymer blend alloy prepared by the method has good notched impact performance at low temperature and normal temperature, strong toughness and good tensile performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of high toughness polymer blend alloys. Background technique [0002] Polycarbonate (Polycarbonate, PC) is a polymer containing carbonate groups in the molecular chain, including aliphatic, aliphatic-aromatic and aromatic PC materials. The bisphenol A polycarbonate in the aromatic polycarbonate has good mechanical properties, high heat distortion temperature, good creep resistance, dimensional stability and good electrical insulation performance, and is widely used in the field of engineering materials. Has been widely used. However, because bisphenol A polycarbonate itself is sensitive to notches and has low notched impact strength; although its shortcomings can be improved by modification, bisphenol A polycarbonate has poor compatibility when blended with other polymers , so its application is limited. Therefore, the impact performance of bisphenol A polycarbonate material and improving t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L55/02C08L67/04C08L23/00C08K7/00C08K3/04
Inventor 王勇王永宏杨静晖张楠黄婷
Owner SOUTHWEST JIAOTONG UNIV