Infra-red and NMR examination of stereoregular polymers of 1,3-pentadiene

“…Indeed, a large number of studies are devoted to the investigation of microstructure of PPD . The microstructure of stereoregular PPDs synthesized by stereospecific polymerization of 1,3‐pentadiene was already studied in detail.…”

Section: Introductionmentioning

confidence: 99%

“…The microstructure of stereoregular PPDs synthesized by stereospecific polymerization of 1,3‐pentadiene was already studied in detail. In early investigations directed to the structure of these PPDs, IR‐spectroscopy or IR‐spectroscopy in a combination with 1 H NMR spectroscopy was initially used . Then, 13 C NMR spectroscopy was chosen as a powerful tool for analysis of the microstructure of stereoregular PPDs .…”

Section: Introductionmentioning

confidence: 99%

A new insight into the mechanism of 1,3‐dienes cationic polymerization. II. Structure of poly(1,3‐pentadiene) synthesized with ^tBuCl/TiCl₄ initiating system

Розенцвет¹,

Korovina²,

Иванова

et al. 2013

J. Polym. Sci. Part A: Polym. Chem.

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The microstructure of poly(1,3‐pentadiene) synthesized by cationic polymerization of 1,3‐pentadiene with tBuCl/TiCl4 initiating system is analyzed using one‐dimensional‐ and two‐dimensional‐NMR spectroscopy. It is shown that unsaturated part of chain contains only homo and mixed dyads with trans−1,4‐, trans−1,2‐, and cis−1,2‐structures with regular and inverse (head‐to‐head or tail‐to‐tail) enchainment, whereas cis−1,4‐ and 3,4‐units are totally absent. The new quantitative method for the calculation of content of different structural units in poly(1,3‐pentadiene)s based on the comparison of methyl region of 13C NMR spectra of original and hydrogenated polymer is proposed. The signals of tert‐butyl head and chloromethyl end groups are identified in a structure of poly(1,3‐pentadiene) chain and the new approaches for the quantitative calculation of number‐average functionality at the α‐ and ω‐end are proposed. © 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2013, 51, 3297–3307

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“…The catalyst system CoCl 2 (P i PrPh 2 ) 2 polymerizes (E)‐1,3‐pentadiene to semicrystalline trans ‐1,2‐syndiotactic polymer. The FTIR spectrum of trans ‐1,2‐PPD, reported in Figure 1, is characterized by two typical absorptions: the intense band at 963 cm −1 assigned to the out‐of‐plane vibration of hydrogen atoms adjacent to the double bond and the band at 1376 cm −1 due to the methyl group of 1,2‐pentadiene units 9–10…”

Section: Resultsmentioning

confidence: 99%

Crystallization and melting behavior of trans‐1,2‐syndiotactic polypentadiene

Bertini

Canetti

Ricci

2005

J of Applied Polymer Sci

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(E)-1,3-pentadiene was polymerized at Ϫ30°C by using the catalyst system CoCl 2 (P i PrPh 2 ) 2 -MAO. A trans-1,2-syndiotactic structure was attributed to the semicrystalline polymer obtained on the basis of the characterization carried out by FTIR, NMR, and WAXD techniques. The thermal behavior of the polypentadiene was investigated by thermogravimetry and differential scanning calorimetry. Isothermal melt crystallization kinetics were analyzed according to the Avrami equation. Nonisothermal crystallization kinetics were elaborated by using Ziabicki and Avrami methods modified by Jeziorny. The equilibrium melting temperature was calculated. The thermal behavior of trans-1,2-syndiotactic polypentadiene was compared with that of 1,2-syndiotactic polybutadiene.

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Infra-red and NMR examination of stereoregular polymers of 1,3-pentadiene

Cited by 29 publications

References 6 publications

Diethylbis(2,2′-bipyridine)iron/MAO. A Very Active and Stereospecific Catalyst for 1,3-Diene Polymerization

Diethylbis(2,2′-bipyridine)iron/MAO. A Very Active and Stereospecific Catalyst for 1,3-Diene Polymerization

A new insight into the mechanism of 1,3‐dienes cationic polymerization. II. Structure of poly(1,3‐pentadiene) synthesized with ^tBuCl/TiCl₄ initiating system

Crystallization and melting behavior of trans‐1,2‐syndiotactic polypentadiene

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Infra-red and NMR examination of stereoregular polymers of 1,3-pentadiene

Cited by 29 publications

References 6 publications

Diethylbis(2,2′-bipyridine)iron/MAO. A Very Active and Stereospecific Catalyst for 1,3-Diene Polymerization

Diethylbis(2,2′-bipyridine)iron/MAO. A Very Active and Stereospecific Catalyst for 1,3-Diene Polymerization

A new insight into the mechanism of 1,3‐dienes cationic polymerization. II. Structure of poly(1,3‐pentadiene) synthesized with tBuCl/TiCl4 initiating system

Crystallization and melting behavior of trans‐1,2‐syndiotactic polypentadiene

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A new insight into the mechanism of 1,3‐dienes cationic polymerization. II. Structure of poly(1,3‐pentadiene) synthesized with ^tBuCl/TiCl₄ initiating system