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A macromolecular bonding agent suitable for polytriazole crosslinking curing system and its preparation method and application

A cross-linking curing, polytriazole technology, applied in the preparation of organic compounds, chemical instruments and methods, preparation of carboxylic acid nitrile and other directions, can solve the problems of no change, poor application effect, poor application effect, etc. Interfacial interaction, the effect of enhancing mechanical properties

Active Publication Date: 2020-07-17
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The bonding agent is an important functional additive to improve the interface bonding effect between the oxidant and the binder in the solid propellant and improve the mechanical properties of the propellant. The application effect in the propellant formulation of polytriazole cross-linking curing system curing is poor, as Eva Landsem et al. and Dual Curing of Smokeless Composite Rocket Propellants. Propellants, Explosives, Pyrotechnics 2013, 38:75-86) reported the influence of macromolecular bonding agent in polytriazole crosslinking curing system on the mechanical properties of propellants: bisphenol A was used in the study Dipropynyl ether (BABE) curing propellant, the isocyanate index R is 1, the maximum tensile strength of the propellant added with 0.05wt-% macromolecular bonding agent and the propellant without enlarging molecular bonding agent is 0.37MPa and 0.38MPa respectively, The tensile strength at break is 0.35MPa and 0.36MPa, respectively, and its mechanical properties have basically remained unchanged, indicating that the application range of the macromolecular bonding agent is limited to the isocyanate curing system, and the application effect is not good in the polytriazole crosslinking curing system.

Method used

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  • A macromolecular bonding agent suitable for polytriazole crosslinking curing system and its preparation method and application
  • A macromolecular bonding agent suitable for polytriazole crosslinking curing system and its preparation method and application
  • A macromolecular bonding agent suitable for polytriazole crosslinking curing system and its preparation method and application

Examples

Experimental program
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Effect test

preparation example Construction

[0017] Preparation of propynyl acrylate

[0018] The four-neck flask was equipped with mechanical stirring, reflux condenser, thermometer and addition funnel, and was cooled with ice water. First add 27.6mL of propynyl alcohol, 136mL of dichloromethane, and 66.4mL of triethylamine. After cooling to below 5°C, slowly add a mixed solution of 40mL of acryloyl chloride and 40mL of dichloromethane dropwise. The reaction is exothermic, and the dropwise addition is controlled so that the reaction temperature does not exceed 30° C. After the dropwise addition is completed, the natural stirring reaction is continued for 4 hours.

[0019] After stopping the reaction, wash with water 3 times, each time with 80 mL of water. After the organic phase was suspended and evaporated under reduced pressure to remove methylene chloride, 0.5 g of hydroquinone was added and transferred to a vacuum distillation device. The collected boiling point was 93 ° C ( 22 kPa) fractions total 51.2g, GC purity...

Embodiment 1

[0022] The preparation of embodiment 1 macromolecule bonding agent

[0023] In a four-neck flask equipped with electromagnetic stirring, reflux condenser, thermometer and constant pressure dropping funnel, add 6.03g of azobisisobutyronitrile, 100mL of acetone, 59.82g of acrylonitrile, and 5.73g of hydroxyethyl acrylate, and stir to dissolve. Add 9.45g of propynyl acrylate and 30mL of acetone into the constant pressure dropping funnel, and mix well. The temperature of the reaction solution was raised to 65°C, and the propynyl acrylate solution was added dropwise after the reaction solution started to turn white, and the dropwise addition was completed in about 5 hours, and the reaction was continued for 2 hours after the dropwise addition was completed.

[0024] After the reaction, pour the reaction solution into a 500mL beaker and let it stand, pour off the supernatant and wash with absolute ethanol three times, 150mL each time, and then vacuum-dry to obtain a light yellow pow...

Embodiment 2

[0027] In a four-neck flask equipped with electromagnetic stirring, reflux condenser, thermometer and constant pressure dropping funnel, add 7.2g azobisisobutyronitrile, 150mL acetone, 80g acrylonitrile, 12.6g hydroxyethyl acrylate, and stir to dissolve. Add 7.4g of propynyl acrylate and 50mL of acetone into the constant pressure dropping funnel, and mix well. The temperature of the reaction solution was raised to 65°C, and the propynyl acrylate solution was added dropwise after the reaction solution started to turn white, and the dropwise addition was completed in about 5 hours, and the reaction was continued for 2 hours after the dropwise addition was completed.

[0028] After the reaction, pour the reaction solution into a 500mL beaker and let it stand, pour off the supernatant and wash with absolute ethanol three times, 150mL each time, and then vacuum-dry to obtain a light yellow powder. Application of embodiment 3 macromolecule bonding agent

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Abstract

The invention discloses a macromolecule bonding agent applicable to a polytriazole cross-linking curing system as well as a preparation method and application thereof. The macromolecule bonding agentis of a structure as show in the specification. The preparation method comprises the following steps: by taking acetone as a solvent, and azodiisobutyronitrile as an initiator, initializing polymerization of acrylonitrile and acrylic acid propargyl alcohol ester, washing with ethanol, and drying, thereby obtaining a bonding agent sample. The macromolecule bonding agent is applicable to the polytriazole cross-linking curing system, and is capable of improving the mechanical properties of a composite solid propellant.

Description

technical field [0001] The invention relates to the structure and preparation method of a macromolecule bonding agent and its monomer, and belongs to the technical fields of chemical synthesis and propellant application. Background technique [0002] The bonding agent is an important functional additive to improve the interface bonding effect between the oxidant and the binder in the solid propellant and improve the mechanical properties of the propellant. The application effect in the propellant formulation of polytriazole cross-linking curing system curing is poor, as Eva Landsem et al. and Dual Curing of Smokeless Composite Rocket Propellants. Propellants, Explosives, Pyrotechnics 2013, 38:75-86) reported the influence of macromolecular bonding agent in polytriazole crosslinking curing system on the mechanical properties of propellants: bisphenol A was used in the study Dipropynyl ether (BABE) curing propellant, the isocyanate index R is 1, the maximum tensile strength o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/44C08F238/00C08F220/20C07C255/19C07C253/30C06B23/00
CPCC06B23/009C07C255/19C08F220/44C08F238/00C08F220/20
Inventor 闫峥峰汪营磊赵昱陈斌陆婷婷潘永飞高福磊刘亚静
Owner XIAN MODERN CHEM RES INST
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