Synthesis, characterization and hydrolysis of an aliphatic polycarbonate by terpolymerization of carbon dioxide, propylene oxide and maleic anhydride

Polymer ◽  
2006 ◽  
Vol 47 (26) ◽  
pp. 8453-8461 ◽  
Author(s):  
Yanfei Liu ◽  
Kelong Huang ◽  
Dongming Peng ◽  
Hong Wu
2008 ◽  
Vol 109 (6) ◽  
pp. 4121-4129 ◽  
Author(s):  
P. F. Song ◽  
M. Xiao ◽  
F. G. Du ◽  
S. J. Wang ◽  
L. Q. Gan ◽  
...  

2003 ◽  
Vol 89 (12) ◽  
pp. 3301-3308 ◽  
Author(s):  
X. H. Li ◽  
Y. Z. Meng ◽  
Q. Zhu ◽  
Y. Xu ◽  
S. C. Tjong

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 881 ◽  
Author(s):  
Lijun Gao ◽  
Xianggen Chen ◽  
Xiangjun Liang ◽  
Xiuzhi Guo ◽  
Xianling Huang ◽  
...  

The thermoplastic poly(propylene carbonate) (PPC) containing cross-linked networks was one-pot synthesized by copolymerization of carbon dioxide, propylene oxide (PO), maleic anhydride (MA), and furfuryl glycidyl ether (FGE). The copolymers were characterized by Fourier transform infrared spectroscopy (FT-IR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA) measurements. The thermal and dimensional stability of the copolymers were improved. When the MA and FGE load increased from 1 mol% to 4 mol% of PO, the copolymers contained the gel contents of 11.0%–26.1% and their yields were about double that of the PPC. The 5% weight-loss degradation temperatures (Td,-5%) and the maximum weight-loss degradation temperatures (Td,max) increased from 149.7–271.3 °C and from 282.6–288.6 °C, respectively, corresponding to 217.1 °C and 239.0 °C of PPC. Additionally, the hot-set elongation tests showed that the copolymers exhibited elasticity and dimensional stability with the minimum permanent deformation of 6.5% which was far less than that of PPC of 157.2%, while the tensile strengths were a little lower than that of PPC because of the following two conflicting factors, cross-links and flexibility of the units formed by the introduced third monomers, MA and FGE. In brief, we provide a novel method of one-pot synthesis of PPC containing cross-linked networks. According to this idea, the properties would be more extensively regulated by changing the cross-linkable monomers.


2021 ◽  
Vol 12 (12) ◽  
pp. 1776-1786
Author(s):  
Zhou Wang ◽  
Ying Mu

Stereoregular poly(propylene carbonate)s and poly(propylene succinate-block-carbonate)s were synthesized with new chiral salenCo(iii) catalysts carrying bulky substituents.


2007 ◽  
Vol 18 (2) ◽  
pp. 209-212 ◽  
Author(s):  
Yan Fei Liu ◽  
Ke Long Huang ◽  
Dong Ming Peng ◽  
Su Qin Liu ◽  
Hong Wu

Studies of the catalytic oxidation of benzene to maleic anhydride and carbon dioxide over vanadia/molybdena catalysts show that the major part of the reaction involves interacting gas and gas-solid processes. The results are consistent with a mechanism in which a benzeneoxygen adduct is formed catalytically, desorbs and then reacts to give maleic anhydride entirely in the gas phase. On the basis of this proposed mechanism, the kinetics of individual reactions have been investigated in some depth. The over-oxidation of maleic anhydride has been found to be not significant under the conditions of reaction. The kinetic relationships governing the homogeneous decomposition of the adduct and the oxidation of the adduct to maleic anhydride and to carbon dioxide have been established. The results show that essentially all of the anhydride originates from mixed gas-solid/gas reaction while substantial amounts of carbon dioxide are produced entirely catalytically.


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