Preparation Of Polymer Nanoparticles From Renewable Biobased 2,3-dihydrofuran And Maleic Anhydride By Stabilizer-Free Dispersion Polymerization

The research was focused on renewable biomass energy substitution of traditional fossil energy had been attracting great attention at present. The use of monomers derived from biomass resources to replace of the fossil fuel in polymer synthesis field not only maintained the functionality needs, also required the advantage of energy saving, environmental protection and a rich source of raw materials.2,3 - dihydrofuran is a kind of biomass monomer, and its belong to the category of furan and furan derivatives which has been wildly reported in recent years. At the same time,2,3 - dihydrofuran is easy to participate in a copolymerization reaction due to the unsaturated double bond, and it contains furan functional group.2,3 - dihydrofuran could be extracted from lots of plants in nature, and their prod he research was focused on renewable biomass energy substitution of traditional fossil energy had been attracting great attention at present. The use of monomers derived from biomass resources to replace of the fossil fuel in polymer synthesis field not ucts have achieved the extensive applications for solvent in organic synthesis, special resin, electronic chemicals and so on.In this work, we attempted to design and synthesized 2,3-dihydrofuran maleic anhydride copolymer in a self-stable precipitation polymerization method. In this method, monomer polymerization could be reacted without any dispersing agent or surfactant. Meanwhile, this reaction has advantage of mild reaction conditions, high reaction rate and yield of the product without stirring. The change of yield of reaction system, copolymer microspheres particle morphology, particle size and dispersivity under the difference conditions of reaction media, monomer concentration, monomer ratio, initiator concentration and reaction temperature was investigated. 2,2’-Azobis(2-methylpropionitrile) (AIBN) was used as an initiator with concentration of 1-4 wt% in the reaction system. The monomer ratio of 2, 3-dihydrofuran and maleic anhydride was amount of 1:1 or slightly excess of maleic anhydride in the range of 0.5 mol/L - 1.5 mol/L under 65-75℃ circumstance. The particle size of copolymer microspheres was in 100-500nm with purity surface and high single degree.The chemical structure of this copolymer was characterized by FTIR, acid-base titration, nuclear magnetic resonance (NMR) spectroscopy,and liquid mass spectrum, which demonstrated that copolymer was alternated by 2, 3-dihydrofuran and maleic anhydride. The molecular weight of copolymer was determined by gel permeation chromatographer (GPC), and the results indicated that the number average molecular weight could be close to 10,000 under the optimal condition.