Expanded-flow hybrid dynamic polymer and method for realizing expanded-flow property thereof

A dilatant, polymer technology, applied in dilatant hybrid dynamic polymers and its realization of dilatancy, can solve the problems of lack of sacrificial components, short service life, waste of resources, etc., and achieve excellent comprehensive expansion. The effect of fluidity, high performance controllability, and fast dynamic transition speed

Active Publication Date: 2020-06-09
厦门天策材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional cross-linked polymer materials are usually thermosetting materials, which lack reversible sacrificial components. On the one hand, the cross-linked materials have insufficient damage resistance; It is also difficult to repair the damage in macroscopically, and it is easy to cause the overall catastrophic damage after the internal local damage of the polymer material, making the material unusable, resulting in short service life and serious waste of resources
Insufficient performance of traditional polymer materials is also reflected in the difficulty of customized production and use according to usage scenarios

Method used

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  • Expanded-flow hybrid dynamic polymer and method for realizing expanded-flow property thereof
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  • Expanded-flow hybrid dynamic polymer and method for realizing expanded-flow property thereof

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preparation example Construction

[0914]In the preparation process of the polymer, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam it.

[0915] Among them, the mechanical foaming method is to introduce a large amount of air or other gases into the emulsion, suspension or solution of the polymer with the help of strong stirring during the preparation of the polymer to make it a uniform foam, and then through physical or Chemical changes shape it into foam. In order to shorten the molding cycle, air can be introduced and emulsifiers or surfactants can be added.

[0916] Wherein, the physical foaming method is to use physical principles to realize the foaming of the polymer during the preparation of the polymer, which includes but is not limited to the following methods: (1) inert gas foaming method, that is, under pressure Under normal circumstances, the inert gas is pressed into the molten polymer or pasty material, and then the pressure is reduced and the tem...

Embodiment 1

[0941]

[0942] Using pyridine as a catalyst and dichloromethane as a solvent, a dynamic crosslinking agent is prepared by reacting compound (a) with excess 4-vinylbenzoyl chloride; 110 molar equivalents of 1-(2-methylhexyl)- 4-vinylbenzene, 2 molar equivalents of dynamic cross-linking agent, 0.6 molar equivalents of benzoyl peroxide, placed in a reaction vessel, dissolved with an appropriate amount of toluene, stirred and reacted at 70°C for 24 hours under a nitrogen atmosphere to obtain a dynamic covalent Cross-linked polystyrene derivative. Take 60 molar equivalents of 1-(2-methylhexyl)-4-vinylbenzene, 50 molar equivalents of styrene, 6 molar equivalents of polyethylene glycol dimethacrylate (molecular weight is 1000), 0.6 molar equivalents of benzene peroxide Formyl, placed in a reaction vessel, record the total mass of the above reactants as 100wt%, then add 70wt% dynamically covalently cross-linked polystyrene derivatives, 300wt% dimethylformamide, stir and swell for ...

Embodiment 2

[0944]

[0945] Take 60 molar equivalents of 1-(2-methoxyethoxy)-4-vinylbenzene, 10 molar equivalents of compound (a), 10 molar equivalents of compound (b), 4 molar equivalents of N-(2-(4-vinyl Phenoxy)ethyl)acrylamide, 1.2 molar equivalents of divinylbenzene, placed in a reaction vessel, dissolved with an appropriate amount of toluene, added 0.4 molar equivalents of azobisisobutyronitrile, and stirred at 70°C for 24 hours under a nitrogen atmosphere , to prepare a dilatant polymer organogel. The gel had a tensile strength of 1.1 MPa and an elongation at break of 540%. The glass transition temperature of the dilatant gel is 52°C, and it also contains rich strong dynamic non-covalent interactions to obtain multiple dilation properties. It is made into a sample with a thickness of 2cm, according to EN1621-2012 method, the measured impact force of the sample passing through at 25°C is 19.9KN. The dilatant gel also has good tear resistance, and can be used in commodity packag...

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Abstract

The invention relates to an expanded-flow hybrid dynamic polymer, which at least contains vitrification swelling property and contains common covalent cross-linking above a gel point and a dynamic unit. The expanded-flow hybrid dynamic polymer has excellent swelling property, the common covalent crosslinking provides good structural stability for the swelling hybrid dynamic polymer, and the dynamic unit has dynamic reversibility, provides synergistic swelling property, molecular level and microscopic self-repairing property and shape memory property for the swelling hybrid dynamic polymer, andimproves the strength, toughness and damage resistance of the material. The expanded-flow hybrid dynamic polymer can be used as an energy absorbing material, a tough material, a shape memory materialand the like, and is widely applied to impact resistance protection, shock absorption, damping, sound absorption, noise elimination, packaging, medical treatment, traffic and the like. The inventionalso relates to a method for realizing the flow expansion property of the hybrid dynamic polymer, and an energy absorption method for absorbing energy by taking the hybrid dynamic polymer with the flow expansion property as t energy absorbing material.

Description

technical field [0001] The invention relates to a dilatant hybrid dynamic polymer and a method for realizing dilatancy, and an energy-absorbing method using the dilatant hybrid dynamic polymer as an energy-absorbing material. Background technique [0002] Compared with traditional materials such as cement, glass, ceramics and metals, polymer materials / macromolecular materials are relatively new materials, but their development speed and wide range of applications have greatly surpassed traditional materials, and they are gradually used in daily life, industry, Various fields such as agriculture, national defense, military and science and technology are playing an increasingly important role. Polymer materials have excellent processing properties, such as plasticity, extensibility, extrudability, and spinnability. The superiority of polymer materials is also reflected in its high elasticity, low elastic modulus, viscoelasticity and other mechanical properties, and this mecha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C08J3/24
CPCC08G83/008C08J3/24C08G2280/00Y02P20/54
Inventor 不公告发明人
Owner 厦门天策材料科技有限公司
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