Force-responsive dilatant polymer and method for realizing dilatant property thereof
A dilatant and polymer technology, applied in the field of dilatant polymers, can solve the problem of inability to repair structural damage, inability to perform plastic reprocessing, and incapability of energy-absorbing materials to provide monitoring and warning for stress, deformation, damage and failure processes Function and other issues
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preparation example Construction
[2190] In the preparation process of the polymer, three methods of mechanical foaming, physical foaming and chemical foaming are mainly used to foam it.
[2191] 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.
[2192] 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 temp...
Embodiment 1
[2218]
[2219] Using triethylamine as a catalyst, reacting 1,1'-ferrocenedimethanol and compound (a) with excess acryloyl chloride respectively to prepare crosslinking agent I and crosslinking agent II; take 120 molar equivalents of acrylic acid 2- (2-phenoxyethoxy) ethyl ester, 15 molar equivalents of acrylic acid, 6 molar equivalents of crosslinking agent 1, 0.8 molar equivalents of azobisisobutyronitrile, are placed in a reaction vessel, dissolved with an appropriate amount of tetrahydrofuran, and then Under a nitrogen atmosphere, react at 70°C for 36 hours to obtain a single-network polymer; take 80 molar equivalents of 2-(2-phenoxyethoxy)ethyl acrylate, 3 molar equivalents of crosslinking agent II, and 0.6 molar equivalents of azobis Isobutyronitrile, placed in a reaction container, record the total mass of the above reactants as 100wt%, dissolve with an appropriate amount of tetrahydrofuran, then add 100wt% single network polymer, stir and swell for 30min, and then re...
Embodiment 2
[2221]
[2222] Take 85 molar equivalents of isobutyl acrylate, 25 molar equivalents of N-(2-(4-vinylphenoxy)ethyl)acrylamide, and 2.5 molar equivalents of diethylene glycol diacrylate, place them in a reaction vessel, and use an appropriate amount of The toluene was dissolved, and then 0.5 molar equivalent of azobisisobutyronitrile was added, stirred and reacted at 70°C for 24 hours under a nitrogen atmosphere, and the cross-linked polymer was purified after the reaction was completed; 30 g of the cross-linked polymer and 2.8 g of compound (a) were swell In dimethylformamide, a dilatant polymer organogel was obtained. The dilatant gel has dilatancy and slow resilience at room temperature, and when pressure is applied to it, the dispersed force-responsive components can be activated by force, causing changes in fluorescence intensity, which can be used to monitor and warn materials under force . The dilatant gel in this embodiment can be used as a commodity packaging mater...
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