The Polymerization of Di-(β-methacrylyloxypropionaldehyde)-pentaerythritolacetal
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概要
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The polymerization of di-(β-methacrylyloxypropionaldehyde)-pentaerythritolacetal (Dβ-MPP) and the copolymerizations of DβMPP with styrene (St) and acrylonitrile (AN) have been carried out at 60°C, using benzoyl peroxide as an initiator. They have then been discussed kinetically from the point of view of cyclopolymerization. The results can be summarized as follows:<BR>1) The relation among the rate of polymerization, <I>R<SUB>p</SUB></I>, the initiator concentration, (I), and the monomer concentration, (M), can be expressed by the following equations;<BR>& R_p/(I)^1/2=A(I)^1/2+B<BR>& R_p/(M)=C(M)+D <BR>where <I>A</I>, <I>B</I>, <I>C</I>, and <I>D</I> are constant.<BR>2) The ratio of the rate constant of the unimolecular cyclization reaction to that of the bimolecular propagation reaction of the uncyclized radical, <I>k<SUB>c</SUB></I>⁄<I>k<SUB>p</SUB></I>, was 22.0 mol/<I>l</I>.<BR>3) The copolymerization of DβMPP proceeded primarily by means of cyclocopolymerization, and the ratio of the cyclization rate to the vinyl propagation also decreased with an increase in the comonomer fraction in the copolymer.<BR>4) The following reactivity ratios were estimated on the basis of the Smets-Roovers equation: (<U>Remark: Graphics omitted.</U>)
- 公益社団法人 日本化学会の論文
著者
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Ouchi Tatsuro
Department Of Applied Chemistry Faculty Of Engineering Kansai University
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Oiwa Masayoshi
Department of Applied Chemistry, Faculty of Engineering, Kansai University
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Imase Yorihiro
Department of Applied Chemistry, Faculty of Engineering, Kansai University
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