caa a22 4500 445388374 CHVBK 20180317143038.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s11144-011-0333-0 doi (NATIONALLICENCE)springer-10.1007/s11144-011-0333-0 Cationic polymerization of α -pinene using Keggin silicotungstic acid as a homogeneous catalyst [Elektronische Daten] [Zuguang Liu, Taishun Zhang, Wei Zeng, Hualong Zhu, Xinnan An] Cationic polymerization of α-pinene with silicotungstic acid (SiW12) as a catalyst was investigated. The structure of polymers and the catalysts were characterized by FT-IR, 1H-NMR and GPC. The experiments show that SiW12 is more active than both phosphotungstic acid and phosphomolybdic acid. The protons dissociating from the catalysts are the reactive species. SiW12 is found to be both the polymerization initiator and the counter-anion of the growing cationic center. The polymerization conditions are optimized by the single factor method as follows: monomer concentration is 50% (v/v), the dosage of catalysts is 7wt% referred to α-pinene, reaction temperature is 50°C, reaction time is 1h. Under these conditions, the overall conversion of α-pinene is up to 90.87%, the polymer yield is 62.46% and its average number molecular weight is about 600. GC-MS analysis shows that there are six isomers of α-pinene after the reaction, but their content is very low. Most of α-pinene are changed to poly(α-pinene). Akadémiai Kiadó, Budapest, Hungary, 2011 α-Pinene nationallicence Silicotungstic acid nationallicence Cationic polymerization nationallicence Poly(α-pinene) nationallicence Liu Zuguang College of Chemistry and Ecological Engineering, Guangxi University for Nationalities, No. 188 Daxue East Road, 530006, Nanning, China aut Zhang Taishun College of Chemistry and Ecological Engineering, Guangxi University for Nationalities, No. 188 Daxue East Road, 530006, Nanning, China aut Zeng Wei College of Chemistry and Ecological Engineering, Guangxi University for Nationalities, No. 188 Daxue East Road, 530006, Nanning, China aut Zhu Hualong College of Chemistry and Ecological Engineering, Guangxi University for Nationalities, No. 188 Daxue East Road, 530006, Nanning, China aut An Xinnan College of Chemical Engineering, Nanjing Forestry University, 210037, Nanjing, China aut Reaction Kinetics, Mechanisms and Catalysis Springer Netherlands 104/1(2011-10-01), 125-137 1878-5190 104:1<125 2011 104 11144 https://doi.org/10.1007/s11144-011-0333-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11144-011-0333-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu Zuguang College of Chemistry and Ecological Engineering, Guangxi University for Nationalities, No. 188 Daxue East Road, 530006, Nanning, China aut NATIONALLICENCE 700 1- Zhang Taishun College of Chemistry and Ecological Engineering, Guangxi University for Nationalities, No. 188 Daxue East Road, 530006, Nanning, China aut NATIONALLICENCE 700 1- Zeng Wei College of Chemistry and Ecological Engineering, Guangxi University for Nationalities, No. 188 Daxue East Road, 530006, Nanning, China aut NATIONALLICENCE 700 1- Zhu Hualong College of Chemistry and Ecological Engineering, Guangxi University for Nationalities, No. 188 Daxue East Road, 530006, Nanning, China aut NATIONALLICENCE 700 1- An Xinnan College of Chemical Engineering, Nanjing Forestry University, 210037, Nanjing, China aut NATIONALLICENCE 773 0- Reaction Kinetics, Mechanisms and Catalysis Springer Netherlands 104/1(2011-10-01), 125-137 1878-5190 104:1<125 2011 104 11144 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer