Preparation method of supramolecular quadruple hydrogen-bond ureido-pyrimidinone (UPy) unit modified polyvinyl chloride (PVC) special resin

Abstract

The invention relates to a preparation method of supramolecular quadruple hydrogen-bond ureido-pyrimidinone (UPy) unit modified polyvinyl chloride (PVC) special resin. UPy-containing acrylate crosslinking agents are used for modifying PVC, and UPy-containing styrene crosslinking agents are used for modifying the PVC. Compared with the existing crosslinking agents, the crosslinking agents selectedfor use in the method have the beneficial effects that UPy quadruple hydrogen-bond system can form a self-complementary quadruple hydrogen-bond interaction, and is good in stability, strong in self-polymerization ability and very high in binding constant; furthermore, the strong non-covalent cross-linking effect is reversible and has a self-recovery ability; high molecular polymers are formed by means of self-assembly through the interaction of non-covalent hydrogen bonds; the combination of repeating units is based on the interaction of the hydrogen bonds, so that the repeating units can be separated and recombined under appropriate conditions and are reversible; therefore, the PVC polymer not only has the properties of the traditional polymers, but also has the excellent characteristicsof stimulative responsibility, self-repairing property, easy processing and the like, and can be used as special resin for smart materials and self-healing materials.

Description

technical field

[0001] The invention relates to a preparation method of a supramolecular quadruple hydrogen bond UPy unit modified polyvinyl chloride special resin. Background technique

[0002] Polyvinyl chloride (PVC) is a polymer material that uses a chlorine atom to replace a hydrogen atom in polyethylene, and is an amorphous polymer with a small amount of crystalline structure. Polyvinyl chloride macromolecular structure exists The unstable structures such as head-to-head structure, branched chain, allyl chloride, and tertiary chlorine make it have disadvantages such as poor thermal deformation resistance and aging resistance. PVC is a linear polymer in which most VCM monomers are connected in a head-to-tail structure, the carbon atoms are arranged in a zigzag shape, all atoms are connected by σ bonds, and all carbon atoms are sp 3 hybridization. Since the molecular chain of PVC resin contains a large number of polar bonds C-Cl bonds, there is a large force between ...

Images