Statistical Ring Opening Metathesis Copolymerization of Norbornene and Cyclopentene by Grubbs’1st-Generation Catalyst

Molecules

卷:20

Christiana Nikovia¹  Dionysios Tzimis¹  Andreas-Philippos Maroudas¹  Panagiotis Goulis¹  Marinos Pitsikalis¹  Patrina Paraskevopoulou² 

[1] Industrial Chemistry Laboratory, Department of Chemistry, University of Athens, Panepistimiopolis Zografou, Athens 15771, Greece;

[2] Inorganic Chemistry Laboratory, Department of Chemistry, University of Athens, Panepistimiopolis Zografou, Athens 15771, Greece;

关键词: Ring Opening Metathesis Polymerization (ROMP);    norbornene;    cyclopentene;    copolymerization;    thermogravimetric analysis (TGA);   

DOI  :  10.3390/molecules200915597

来源: DOAJ

【 摘 要 】

Statistical copolymers of norbornene (NBE) with cyclopentene (CP) were prepared by ring-opening metathesis polymerization, employing the 1st-generation Grubbs’ catalyst, in the presence or absence of triphenylphosphine, PPh3. The reactivity ratios were estimated using the Finemann-Ross, inverted Finemann-Ross, and Kelen-Tüdos graphical methods, along with the computer program COPOINT, which evaluates the parameters of binary copolymerizations from comonomer/copolymer composition data by integrating a given copolymerization equation in its differential form. Structural parameters of the copolymers were obtained by calculating the dyad sequence fractions and the mean sequence length, which were derived using the monomer reactivity ratios. The kinetics of thermal decomposition of the copolymers along with the respective homopolymers was studied by thermogravimetric analysis within the framework of the Ozawa-Flynn-Wall and Kissinger methodologies. Finally, the effect of triphenylphosphine on the kinetics of copolymerization, the reactivity ratios, and the kinetics of thermal decomposition were examined.

【 授权许可】

Unknown