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Synthesis and Properties of Series of Styrene-Methasrylate High Oil-absorption Resins and the Preparation of Precusor for the Auxetic Aromatic Polyamide

Author: LiJing
Tutor: WuHongMei
School: Nanhua University
Course: Applied Chemistry
Keywords: styrene methasrylate High Oil-absorption Resin auxetic polyarylamide precusor
CLC: TQ324.8
Type: Master's thesis
Year: 2011
Downloads: 107
Quote: 2
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Abstract


High Oil-Absorption Resin is the varyeties most development prospect, and it is the hot point amont all the oil-absorption materials due to its advantage such as efficiency, cheapness and excellent comprehensive performance.High oil-absorption resins were prepared with styrene, Methyl methacrylate, Methyl methacrylate and lauryl methacrylate as main monomers, HEC as dispersant reagent and BPO as initiator and DVB as crosslinker by binary copolymerization. The pellatization mechanism was investigated. The effects of the monomer ratio, crosslinker, initiator, dispersant agent on oil absorptivity of resin and defined optimum reaction condition were studied. the microscope photographs was used to study the chansformation of oil absorption of resin before and after absorpting. The results showed that interior network and hydrophobic groups played an important role on high oil-absorption properties. The highest oil absorptivity of the resin was 14g/g in toluene and 10.5g/g in ethyl acetate, and the length of the side chain alkyl increased oil absorption rate gradually heighten.Preparation of auxetic materials on molecular is the hot spot and a new mentality in the research field of auxetic. The difficulty is to synthetize precusor. The precusor of auxetic polyamide have been obtained by a series of synthesis in this paper. Preparation route is designed with the precusor named 2,6-dimethyl-4”’- pentyl- quaterphenyl as target product and with terphenyl as main raw material. It consists of the preparation of valeroyl chloride, 4-n-pentanoylterphenyl, 4-pentylterphenyl, 4-pentyl-4’-iodine-terphenyl, 2,6-dimethyl-4”’-pentyl-quaterphenyl and 2,6- dimethyl -4”’-pentyl-quaterphenyl. The products yield respectively is 83.7%, 94.3%, 72.3%, 48.7%, 90.2% and 10.7%. The precusor of auxetic polyamide could be preparaed by the synthesis route designed was been confirmed by charicateration consists of the testing of melt/boiling point, IR, 1H NMR. Discussion on reactions was in the works, especially optimizing of the reduction of carbonyl and the preparation of Grinard reagent which could increase the producrs’yield and purity;

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CLC: > Industrial Technology > Chemical Industry > Synthetic resins and plastics industry > Specialty plastics > Special performance plastic
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