Molecular Weight and Molecular Weight Distribution Control of Ring-opening Metathesis Polymerization of Norbornene

Chem. J. Chinese Universities

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Molecular Weight and Molecular Weight Distribution Control of Ring-opening Metathesis Polymerization of Norbornene

DU Chuang¹, WANG Chun-Yu², ZHANG Guo¹, TANG Jun²*

1. College of Materials Science and Engineering;
2. Key Laboratory of Supramolecular Structure and Materials, Ministry of Education, College of Chemistry, Jilin University, Changchun 130012, China

Received:2007-05-28 Revised:1900-01-01 Online:2007-10-10 Published:2007-10-10
Contact: TANG Jun

Abstract

Abstract: Ring-opening metathesis polymerization of norbornene catalyzed by Grubbs catalyst [(PCy₃)₂·(Cl)₂Ru=CHPh] was carried out. The results of ¹H NMR demonstrated that the polymerization of the norbornene monomer proceeded by the ROMP mechanism. The molecular weight and molecular weight distribution of this reaction can be controlled by changing the stirring time of catalyst, choosing different solvents and the adding of PPh₃ during the polymerization. The results show that stirring the catalyst for 15 min, using more polar solvent and adding 2 equiv of PPh3 can optimize the conditions of this reaction. The polydispersity indices(PDIs) of the poly(norbornene) were nearly monodisperse(PDIs about 1.18).

Key words: Ring-opening metathesis polymerization, Norbornene, Molecular weight, Molecular weight distribution

CLC Number:

O631.5

TrendMD:

DU Chuang¹, WANG Chun-Yu², ZHANG Guo¹, TANG Jun²*. Molecular Weight and Molecular Weight Distribution Control of Ring-opening Metathesis Polymerization of Norbornene[J]. Chem. J. Chinese Universities, doi: .

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Molecular Weight and Molecular Weight Distribution Control of Ring-opening Metathesis Polymerization of Norbornene

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