Study On The Copolymerization Of Styrene With Maleic Anhydride Using Plasma Initiation And Blending Of Copolymer With Polypropylene

In this dissertation, the copolymerization of styrene (St) with maleic anhydride(MAH) under room temperature and atmosphere was completed by the plasma of ArandCO2initiationinthedielectricbarrierdischarge(DBD).Thechemical structureofcopolymer(SMA) was characterizedbyFTIR andNMR,showingSMAwas alternatecopolymer and random copolymer in a little part. The radical polymerization in thecopolymerization of St with MAH was proved by radical scavenger, DPPH. Thereactive conditions in the copolymerization of St with MAH were studied by theplasma of Ar and CO2 initiation under DBD. The variation of the rate production ofSMA with molar ratio was discussed, showing the rate production of SMA existedmaximum when molar ratio was 1:1. The gel should be formatted with increasinginitiation time in the copolymerization, leading to increasing rate production of SMAand number average molecular weight. In this experiment, the effect of postpolymerization time and temperature were small as compared with the effect of theinitiationtimeonrateproductionandmolecularweightofSMA.In this work, the modification of surface for PPwas studied byplasma. Also themixingof SMAwith modified PP(PPP) was studied. The linear viscoelastic behaviorof PPP/SMAcompound was measured by the dynamic rheology method. Han curveswere coincident, showing this system (PPP/SMAcompound system) was uniform, asthe chemical-bound was formed between PPP and SMA in this compound. Also theexperiment of time-temperature superposition principle showed PPP/SMA systemhomogeneous system. The zero shear viscosity,η0 , storage modulus,G?, and lossmodulus,G?? , increase with increasing component of SMAand they was greater thanPPP. So the complex chemical-bound was arose between PPPand SMAin PPP/SMAstructurebecausethereactionofplasmainitiationtoleadtonewpolymer.