Synthesis And Application Of The Modified PVAc

The optimal technique of modified PVAc was studied on the first part of the thesis by the single factor experiment combined with orthogonality experiment. The optimal technique of paper making using modified PVAc by sizing was studied on the secondary part of the thesis by the orthogonality experiment.The results of the research as follow:1. The result of the research showed: the quality ratio of monmer and water is 1:3.2. By the orthogonality experiment, the optimal conditions of PVAc was modified as follow: the quality ratio of VAc, MA and MMA 6:2:2, the charge of PVA(1799) 4%(monomer), the charge of OP-10 0.8%(monomer), the charge of initiator 0.4%(monomer), the temperature 66 ℃, and the heat preservation time 10—60 minutes.3. IR spectra analysis of the PVAc and the modified PVAc show: the PVAc was a homopolymer which was polymerized by the head-tail and the modified PVAc was a heteropolymer which was polymerized by head-tail, the head-head or tail-tail.