A dynamic polymer with non-covalent crosslinking structure and its application
A technology of cross-linking structures and polymers, applied in the field of intelligent polymers
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[0157] In the preparation process of dynamic polymers, after the compounds used as raw materials participate in the reaction with each other, the raw material components can be polymerized with organoboric silicon ester bonds or ordinary covalent bonds as link points to obtain dynamic polymers with higher molecular weight . Among them, the functional groups contained in the raw material components can be fully reacted or partially reacted, and it is not required that all the organoboronic acid groups and / or organoborate groups and the silanol and / or silanol precursors completely react with each other to form Organoborosilicate linkages, as long as the organoborosilicate linkages formed are sufficient to maintain the dynamic polymer structure.
[0158] In the present invention, since the preparation process of the dynamic polymer using the above two implementations is simple, easy to operate and highly controllable, it is a preferred implementation of the present invention.
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Embodiment 1
[0265] A dynamic polymer with a linear structure is prepared by using a small-molecule organic boron compound (I) containing a bifunctional group and a small-molecule silicon-containing compound (II) containing a bifunctional group.
[0266]
[0267] Take a certain amount of organoboron compound (a) (using methyllithium, vinyllithium and trimethyl borate to react to make methylvinylboronic acid; using AIBN as initiator and triethylamine as catalyst, using methylethylene boronic acid and 1,6-hexanedithiol by thiol-ene click reaction) dissolved in tetrahydrofuran solvent to prepare a 0.8mol / L solution; weigh a certain amount of silicon-containing compound (b) (using dimethyl Allyl chlorosilane, 1,10-decanedithiol as raw materials, AIBN as initiator, triethylamine as catalyst, prepared by thiol-ene click reaction) dissolved in tetrahydrofuran solvent to prepare 0.8mol / L Solution: Take 20ml of tetrahydrofuran solution dissolved with organoboron compound and pour it into a dry a...
Embodiment 2
[0269] A dynamic polymer with a linear structure is prepared by using a macromolecular organoboron compound (I) containing a bifunctional group and a macromolecular silicon-containing compound (II) containing a bifunctional group.
[0270]
[0271] Weigh 7.5g of boric acid-terminated polyether (a) in a dry and clean beaker (using 1-hydroxyborole-3-ene as a raw material, and prepare 3-bromo-3-ene by addition reaction with hydrobromic acid 1-Hydroxyborolane, and then it and polyetheramine with potassium carbonate as a catalyst, prepared by hydrocarbylation reaction), 60ml of deionized water was added therein, placed at 50°C and continuously stirred to dissolve, After the dissolution is complete, a small amount of 1mol / L NaOH solution is added dropwise therein; 5.2g of silane-terminated polyether (b) is weighed (using double-hydroxyl-terminated polyethylene glycol as a raw material, which is reacted with acrylic acid through esterification After the intermediate product is obt...
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Abstract
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