1 H NMR spectrum of Poly (propylene carbonate) - ResearchGate
This review presents advances and challenges in the CO2 and propylene oxide (PO) co-polymerization using heterogeneous catalysts to form poly (propylene carbonate) (PPC), an environmentally ...
The main advantage of NMR in the characterization of polymers is the unique molecular structural information which can be obtained. For instance, the relative configurational distribution (tacticity) and regio irregularities (defects) in homopolymers of polypropylene (PP) can be mapped out and represent a unique microfingerprint of the polymer.
During the last two decades, nuclear magnetic resonance (NMR) spectro scopy has become a valuable and indispensable analytical tool among polymer chemists. For example, the determination of n-ad distribution numbers is frequently a …
Ring-opening polymerization of propylene carbonate: Microstructural ...
2018年8月1日 — Herein, we report on polymerization of propylene carbonate and detailed microstructral analysis of the polymer by advanced one-dimensional (1 H and 13C, DEPT-90, DEPT-135) and two-dimensional NMR techniques (TOCSY, HSQC and HMBC).
Material Properties of Poly(Propylene Carbonates)
2011年1月1日 — The material properties of poly(propylene carbonate) (PPC) are discussed with respect to thermal features, viscoelastic and mechanical properties, processability, characteristics in solution, biodegradability, and biocompatibility.
Poly(propylene carbonate): Insight into the Microstructure and ...
2012年10月31日 — The microstructures of the obtained copolymers as a function of polymerization time have been analyzed by a combination of chiral GC and high-resolution NMR spectroscopy. The 13 C NMR spectra of selected poly(propylene carbonate) samples were recorded using a 900 MHz ( 1 H) spectrometer, showing a previously unreported fine splitting of the ...
1 H NMR spectra of poly(propylene carbonate) (PPC
This review presents advances and challenges in the CO2 and propylene oxide (PO) co-polymerization using heterogeneous catalysts to form poly (propylene carbonate) (PPC), an environmentally ...
ABSTRACT: The high resolution solid state 13C NMR spectra were observed for highly syndiotactic polypropylene samples with three kinds of crystalline forms, forms I, II, and III. The forms I...
Full Assignment of the 13C NMR Spectra of Regioregular …
We recently reported the assignment of the methyl and methylene regions in the 150 MHz 13 C NMR spectra of regioregular polypropylenes with different tacticities. In this article, we complete the assignment by extending it to the methine region.
Structure and Properties of Poly(Propylene Carbonate)
2006年9月24日 — Poly(propylene carbonate) (PPC), a new kind of aliphatic polycarbonate copolymerized by carbon dioxide and propylene oxide, was characterized by FTIR, 1 H-NMR, 13 C-NMR, DSC, TG, and viscosimetry. The copolymer chains consisted of alternative segments of carbon dioxide and propylene oxide and a small amount of homopolymer of propylene oxide.