For Libraries For Publication Open Access Downloads About Us Contact Us
Paper Titles
Study on the Change in Microstructure of Fly Ash Concrete Depending on Ages and Degree of Hydration Using XRD and SEM
p.350
Synthesis of Cu2O/NiFe2O4 Magnetic Complex and its Application in Photocatalytic Degradation
p.356
The Study in Mechanical Properties of Non Uniform Paper Stuff Material by Digit Image Frequency Domination Correlation Method
p.362
Preparation and Characterization of Nitrogen-Doped TiO2 Decorated with Different Metal Ion
p.368
Synthesis of PLA-PEG Block Polymer Catalyzed by Solid Super Acid
p.373
Properties of Porous Asphalt Mixture Made with Styrene Butadiene Styrene under Long Term Oven Ageing
p.378
Study on the Dyeing Properties of Poly(Lactic Acid) and Silk Yarns with Natural Dyes
p.384
Preparation of the Novel Nanocomposite Biurea/Montmorillonite via In Situ Synthesis
p.388
Combined Effects between Functionalized Multi-Walled Carbon Nanotubes and Cigarette Smoke on Human Bronchial Epithelial Cells
p.394

Synthesis of PLA-PEG Block Polymer Catalyzed by Solid Super Acid

Article Preview

Abstract:

The PLA-PEG block polymer was prepared by opening ring polymerization catalyzed by solid super acid SO42-/ZrO2-CeO2. The acidic property was measured by IR spectra, Hammett Indicator and NH3-TPD techniques. The copolymer was measured by FTIR spectra. The results show the solid super acid SO42-/ZrO2-CeO2 had the strongest acid strength and maximal acid content roasted at 650. Under reaction conditions which were the amount of catalyst 1.0% vs lactide, and polymerization at 170 for 9 h, the intrinsic viscosity reached 1.562 dl. g-1.

You might also be interested in these eBooks
Nanotechnology and Advanced Materials View Preview

Info:

Periodical:

Advanced Materials Research (Volume 486)

Pages:

373-377

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.486.373

Citation:

Cite this paper

Online since:

March 2012

Authors:

Wen Ming Liu, Ming Gong, Hui Yang, Lu Xia

Keywords:

Hammett Indicator, PLA-PEG Block Polymer, Poly(lactic acid) (PLA), Solid Super Acid

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2012 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] M. Sasatsu, H. Onishi, Y. Machida: Pharmaceutical Nanotechnology, Vol. 294 (2005), p.233.

Google Scholar

[2] Z. Gao, L. Guo: New Chemical Materials, Vol. 37(2009): p.73.

Google Scholar

[3] R. K. Hans, H. T. Heiko, S. Gert: Biomacromolecules, Vol. 5(2004): p.492.

Google Scholar

[4] H. Yang, R. Lu, L. Shen, et al: Materials Letters, Vol. 57 (2003): p.2572.

Google Scholar

[5] W. Liu, X. Huang, Q. Xiao, et al: Journal of Molecular Catalysis (China), Vol. 22 (2008): p.519.

Google Scholar

[6] W. Liu, H. Yang, X. Huang, et al: Applied Chemical Industry (China), Vol. 37(2008): p.487.

Google Scholar

[7] T. Yamaguchi, T. Jin, K Tanabe: J Phys Chem, Vol. 90 (1986): p.3148.

Google Scholar

[8] J. Xu, X. Li, P. Li, et al: Nanchang University (Eng. & Tech. ), Vol. 29(2007): p.106.

Google Scholar

© 2025 Trans Tech Publications Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. For open access content, terms of the Creative Commons licensing CC-BY are applied.
Scientific.Net is a registered trademark of Trans Tech Publications Ltd.