Intramolecular trifunctional Lewis acid-base pair catalyst, cyclic topology pmmbl polymer and preparation method and application
A technology of Lewis acid-base pair and trifunctional group, which is applied in the field of PMMBL polymer with ring topology structure and its preparation, can solve the problems such as the inability to prepare PMMBL polymer, and achieve the effects of suitable industrial production, small hydrodynamic volume, and simple operation
Active Publication Date: 2022-05-31
JILIN UNIV
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Problems solved by technology
However, the PMMBL polymer prepared by the existing catalyst has a linear topology, and cannot prepare a pure ring topology PMMBL polymer
Method used
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[0071]
[0075]
[0077]
[0086]
[0096]
[0097] In the formula IV, n is an integer greater than 1, preferably 1000-4000.
Embodiment 1
Embodiment 2
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The invention relates to the technical field of catalysts, in particular to intramolecular trifunctional Lewis acid-base pair catalysts, preparation methods and applications, ring topology PMMBL polymers, preparation methods and applications. The intramolecular trifunctional Lewis acid-base pair catalyst provided by the present invention has any one or several structures shown in formulas I to III. The catalyst provided by the present invention adopts the chain growth mechanism of "bimolecular synergy". Two Lewis acid sites of B and one Lewis base site of P of the catalyst simultaneously exist in the same molecular structure through covalent bonding and acidic The application of the weaker B-site Lewis acid is favorable for the ω-end of one polymer chain to attack the α-terminus of the other chain, so that the catalyst structure leaves and the two polymer chains connect end-to-end to form a ring to prepare a high initial heat Degradation temperature and narrow thermal degradation temperature window for ring topology PMMBL polymers.
Description
Intramolecular trifunctional Lewis acid-base pair catalyst, cyclic topology PMMBL polymer Compound, preparation method and application technical field The present invention relates to catalyst technical field, be specifically related to intramolecular trifunctional Lewis acid-base pair catalyst, ring PMMBL polymer with topological structure and preparation method and application. Background technique In 2010, the Lewis acid-base pair catalyzed polymerization (LP) of intermolecular interaction was reported for the first time, that is, by collocation A suitable Lewis acid (LA) and a Lewis base (LB) are matched in pairs, and the two act synergistically to activate the monomer and carry out polymer chain growth. Procedure. Lewis acid-base pair catalysts with intermolecular interactions not only enable various polar vinyl monomers to be active and controllable It can also be used for the ring-opening polymerization of lactones, the ring-opening alternating copolymeriza...
Claims
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IPC IPC(8): C08G63/84C08G63/08C07F9/6596C07F9/50
CPCC08G63/84C08G63/823C08G63/08C07F9/6596C07F9/5022C07F9/5068Y02P20/584
Inventor 张越涛宋艳娇何江华
Owner JILIN UNIV
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