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POSS/PA6 (polyhedral oligomeric silsesquioxane/polycaprolactam) composite material and preparation method thereof

A composite material and cage technology, applied in the direction of silicon organic compounds, etc., can solve the problems of affecting the improvement of mechanical properties such as low temperature impact toughness of modified PA6, affecting the dispersion of POSS monomers, and limited addition of POSS, etc., to improve the application temperature. range, low thermal conductivity, effect of improving dispersibility

Active Publication Date: 2013-03-20
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the disadvantages of PA6 are poor low temperature impact toughness, notch sensitivity, and high water absorption.
[0009] The above literature has done relevant research on POSS modified PA6, but there are still deficiencies, because the POSS used has two kinds of functional groups: epoxy group and vinyl group, among which vinyl group will undergo polymerization reaction under high temperature conditions, affecting The dispersion of POSS monomer in the polymer matrix leads to a limited amount of POSS added, which affects the improvement of mechanical properties such as low temperature impact toughness of modified PA6

Method used

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  • POSS/PA6 (polyhedral oligomeric silsesquioxane/polycaprolactam) composite material and preparation method thereof
  • POSS/PA6 (polyhedral oligomeric silsesquioxane/polycaprolactam) composite material and preparation method thereof
  • POSS/PA6 (polyhedral oligomeric silsesquioxane/polycaprolactam) composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] (1) Add 70ml of γ-(2,3-epoxypropoxy)propyltrimethoxysilane and 10ml of phenyltrimethoxysilane into a 250ml one-necked flask, then add 150ml of ethanol to it, and then Add concentrated hydrochloric acid dropwise to the aforementioned mixed solution, adjust the pH value to about 3, raise the temperature to 90°C and react for 7 days; filter after the reaction, and vacuum-dry at 80°C for 24 hours to obtain the POSS product with the structure of formula (1);

[0052] (2) Air-dry PA6 at 100°C for 3 hours;

[0053] (3) Weigh 99 parts of PA6 dried in (2) and 1 part of POSS prepared in (1), 0.2 parts of tetraerythritol ester antioxidant, 0.2 parts of tris(2,4-di-tert-butylphenyl) phosphite Ester antioxidant, 0.5 part of montan wax, mixed in a high-speed mixer for 5 minutes;

[0054] (4) Extrude and granulate the uniformly mixed materials in a twin-screw extruder to obtain POSS / PA6 composite materials; the temperature of the extruder is set to: 190°C for zone I, 215°C for zone I...

Embodiment 2

[0056] (1) Add 70ml of γ-(2,3-glycidoxy)propyltrimethoxysilane and 10ml of cyclopentyltrimethoxysilane into a 250ml one-necked flask, and then add 150ml of methanol to it, Then add concentrated hydrochloric acid dropwise to the aforementioned mixed solution, adjust the pH value to about 3, heat up to 90°C and react for 7 days; filter after the reaction, and vacuum-dry at 80°C for 24 hours to obtain the POSS product with the structure of formula (1);

[0057] (2) Air-dry PA6 at 150°C for 4 hours;

[0058] (3) Weigh 95 parts of PA6 dried in (2) and 5 parts of POSS prepared in (1), 0.2 parts of tris(2,4-di-tert-butylphenyl) phosphite antioxidant, 0.5 parts of pentaerythritol hard Fatty acid ester, 0.5 white wax oil, mixed in a high-speed mixer for 5 minutes;

[0059] (4) Extrude and granulate the uniformly mixed materials in a twin-screw extruder to obtain POSS / PA6 composite materials; the temperature of the extruder is set to: 190°C in zone I, 215°C in zone II, 235°C in zone II...

Embodiment 3

[0061] (1) Add 60ml of γ-(2,3-epoxypropoxy)propyltrimethoxysilane and 20ml of phenyltrimethoxysilane into a 250ml one-necked flask, then add 150ml of ethanol to it, and then Concentrated hydrochloric acid was added dropwise to the aforementioned mixed solution to adjust the pH value to about 3, and the temperature was raised to 90°C to react for 7 days; after the reaction was completed, it was filtered and vacuum-dried at 80°C for 24 hours to obtain the POSS product with the structure of formula (2).

[0062] (2) Air-dry PA6 at 100°C for 3 hours;

[0063] (3) Weigh 90 parts of PA6 dried in (2) and 10 parts of POSS prepared in (1), 0.2 parts of tris(2,4-di-tert-butylphenyl) phosphite antioxidant, 0.2 parts of N, N'-hexamethylenebis(3,5-di-tert-butyl-4-hydroxyphenylpropionamide) antioxidant, 0.5 parts of montan wax, mixed in a high-speed mixer for 5 minutes;

[0064] (4) Extrude and granulate the uniformly mixed materials in a twin-screw extruder to obtain POSS / PA6 composite ma...

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Abstract

The invention provides a POSS / PA6 (polyhedral oligomeric silsesquioxane / polycaprolactam) composite material and a preparation method thereof. The composite material is prepared from 70-99 parts of PA6, 1-30 parts of POSS, 0.1-1 part of antioxidant and 0.1-1 part of lubricant through mixing, granulating and extruding. According to the invention, the novel POSS monomer is used and added into the PA6, so that the intensity of the composite material is enhanced, the application temperature range of the composite material is enlarged, the composite material has high oxidation resistance and water resistance, the flammability and combustion rate of the composite material are reduced, and the composite material has high glass transition temperature and low heat conductivity.

Description

technical field [0001] The invention belongs to the technical field of polymer composite materials, and in particular relates to a POSS / PA6 composite material and a preparation method thereof. Background technique [0002] Cage polysilsesquioxane (POSS for short) is an emerging class of organic / inorganic hybrid nanomaterials at the molecular level in recent years, and its general molecular formula is (RSiO 1.5 ) n, n is generally 6, 8, 10, 12, etc., among which n is 8 is the most typical. POSS has both the nanometer size and cage structure of inorganic nanoparticles, and has the advantages of organic polymers, such as: [0003] 1. The POSS inorganic silicon-oxygen skeleton structure determines its outstanding heat resistance, flame retardancy and radiation resistance; [0004] 2. POSS can improve the toughness of polymers, because POSS nanoparticles can terminate the development of microcrack tips, and can cause silver crazes or shear bands, or rearrange molecular chains. ...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K5/549C07F7/21
Inventor 杨桂生俞建
Owner HEFEI GENIUS NEW MATERIALS
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