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Polyvinyl alcohol acetal aromatic aldehyde grafting glycidyl azide polymer, preparation method thereof and application thereof

A polyvinyl aromatic aldehyde and polyvinyl acetal technology, which is applied in the field of energetic polymers and their preparation, can solve the problems of limiting the application of melting and casting explosives, poor compatibility between TNT and polyurethane, and reducing the detonation energy of explosives. Achieve good development potential and market prospects, easy separation and purification, and simple and convenient preparation methods

Inactive Publication Date: 2013-06-19
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor compatibility of TNT and polyurethane, its application in the field of melting and casting explosives is limited.
In addition, the addition of inert additives will reduce the detonation energy of the explosive

Method used

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  • Polyvinyl alcohol acetal aromatic aldehyde grafting glycidyl azide polymer, preparation method thereof and application thereof
  • Polyvinyl alcohol acetal aromatic aldehyde grafting glycidyl azide polymer, preparation method thereof and application thereof
  • Polyvinyl alcohol acetal aromatic aldehyde grafting glycidyl azide polymer, preparation method thereof and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A 250 mL four-necked flask equipped with a mechanical stirring rod, a reflux condenser and a thermometer was filled with dry argon, and 20 mL of dry DMAc solution, 4.40 g of toluene diisocyanate and 0.30 g of DBTDL were added, the temperature was raised to 60 °C, and the Add the DMAc solution of GAP with an average molecular weight of 700 (10.00 g GAP dissolved in 40 mL dry DMAc) drop by drop under stirring conditions, stir and react at 60°C for 4 hours, and then add polyvinyl acetalization with a degree of acetalization of 60%. DMAc solution of formaldehyde (10.00 g polyvinyl benzal dissolved in 60 mL dry DMAc), continue to stir for 48 hours, after the reaction, pour the reaction solution into 1500 mL distilled water, a large amount of solids precipitated, filtered The obtained solid was washed 3 times with 500 mL of water, and then vacuum-dried at 40 °C to obtain 23.60 g of polyvinyl benzal grafted polyazide glycidyl ether. The infrared spectrum of the product is shown...

Embodiment 2

[0025] A 250 mL four-neck flask equipped with a mechanical stirring rod, a reflux condenser and a thermometer was filled with dry argon, and 20 mL of dry DMAc solution, 0.87 g of toluene diisocyanate and 0.20 g of DBTDL were added, and the temperature was raised to 60 °C, and the Add the DMAc solution of GAP with an average molecular weight of 4000 (10.00 g GAP dissolved in 40 mL dry DMAc) drop by drop under stirring conditions, stir and react at 60°C for 3 hours, and then add polyvinyl alcohol acetalization with a degree of acetalization of 80%. The DMAc solution of nitrobenzaldehyde (10.00 g of polyvinyl m-nitrobenzaldehyde dissolved in 60 mL of dry DMAc), continued stirring for 36 hours, after the reaction was completed, the reaction solution was poured into 1500 mL of distilled water. A large amount of solids precipitated, and after filtering, the obtained solids were washed 3 times with 500 mL of water, and then vacuum-dried at 40 °C to obtain 20.20 g of polyvinyl m-nitrob...

Embodiment 3

[0027] A 250 mL four-necked flask equipped with a mechanical stirring rod, a reflux condenser and a thermometer was filled with dry argon, and 20 mL of dry DMAc solution, 0.35 g of toluene diisocyanate and 0.20 g of DBTDL were added, and the temperature was raised to 70 °C, and the Add the DMAc solution of GAP with an average molecular weight of 10,000 (10.00 g GAP dissolved in 60 mL dry DMAc) drop by drop under stirring conditions, stir and react at 70°C for 2 hours, and then add polyvinyl alcohol acetalization with a degree of acetalization of 80%. DMAc solution of nitrobenzaldehyde (10.00 g of polyvinyl p-nitrobenzaldehyde dissolved in 60 mL of dry DMAc), continued to stir for 24 hours, after the reaction, poured the reaction solution into 1500 mL of distilled water, there was A large amount of solids precipitated, and after filtration, the obtained solids were washed with 500 mL of water for 3 times, and then vacuum-dried at 40 °C to obtain 19.80 g of polyvinyl p-nitrobenza...

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Abstract

The invention relates to a polyvinyl alcohol acetal aromatic aldehyde grafting glycidyl azide polymer and a preparation method thereof. Polyvinyl alcohol acetal aromatic aldehyde and a glycidyl azide polymer which serve as initiators and diisocyanate serving as a cross-linking agent perform a homogeneous phase cross-linking reaction to obtain the polyvinyl alcohol acetal aromatic aldehyde grafting glycidyl azide polymer. The energetic polymer is used as a toughening elasticizer to be applied in fields of energetic materials such as explosives, propellants, pyrotechics and the like.

Description

technical field [0001] The invention belongs to an energetic polymer and a preparation method thereof, and relates to the preparation technology of polyvinyl acetal aromatic grafted polyazide glycidyl ether polymer. The prepared energetic polymer can be used in fields such as explosives, propellants and pyrotechnics. Background technique [0002] With the modern military struggle and the increasingly complex battlefield environment, more stringent requirements have been put forward for the combat function, damage efficiency and safety of conventional weapons. All countries in the world are vigorously developing high-power aerial bombs. Aerial bombs have the characteristics of large charge, strong explosive destructive power, and large killing area. For the formula design of explosives, the charging technology and safety must be reliable, and at the same time, the economic cost of the charge must be taken into account. Low-sensitivity and high-energy melt-cast explosives ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F291/08C08F291/12C08L29/14C08K5/29C06B23/00
Inventor 金波彭汝芳沈娟董海山夏云霞楚士晋
Owner SOUTHWEAT UNIV OF SCI & TECH
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