Method for preparing block copolymer containing polyvinylpyridine in non-polarized solution

• Main Authors: ZHANG LIQUN, LI QIONG, WU YOUPING, HAN BINGYONG
• Format: Patent
• Language: Chinese; English
• Published: 07.03.2012
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The invention relates to a method of preparing block copolymers comprising p-vinyl pyridines in nonpolar solvents, which relates to the field of macromolecular compound composition. The method uses negative ion polymerization to prepare block copolymers comprising polar monomer vinyl pyridine polymer chain, in non-polar solvents, such as cyclohexane, etc. The polymeric process has two steps of feeding raw materials, i.e. firstly, organolithium is used to initiate the polymerization of non-polar monomers, such as styrene, butadiene, isoprene, etc., and then alkyl aluminum, alkyl magnesium, etc. is used to reduce the activity of the polymer, and finally, vinyl pyridine monomer is fed to polymerize. The polymeric method is negative ion dispersion polymerization, and its products are microspheres formed by diblock copolymers. The polymer has broad uses, such as material surface modification, high-molecular material compatilizer. Moreover, the microsphere could be a new kind of reinforcing filler.