scholarly journals Synthesis and characterization of calcium-containing polyurethane using calcium lactate as a chain extender

2012 ◽  
Vol 44 (10) ◽  
pp. 1009-1014 ◽  
Author(s):  
Priya A Nair ◽  
Parameswaran Ramesh
Keyword(s):  
Chain Extender ◽  
Calcium Lactate ◽  
Synthesis And Characterization ◽  
A Chain

Synthesis and Characterization of Polyurethane/Clay Nanocomposites

2015 ◽  
Vol 1110 ◽  
pp. 73-76 ◽  
Author(s):  
Sau Leng Sin ◽  
Hong Yan ◽  
Jian Wei Xu
Keyword(s):  
Hydrogen Bonding ◽  
Chain Extender ◽  
Synthesis And Characterization ◽  
Clay Nanocomposites ◽  
Chain Extenders ◽  
A Chain

This paper describes synthesis of a series of polyurethane (PU)/clay nanocomposites by using two different chain extenders ethylenediamine (ED) and 1,3-diamino-2-propanol (DAP). By using DAP as a chain extender, PU/clay nanocomposites show not only the stronger inter-and intrachain interactions through hydrogen bonding, but also exhibit enhanced clay exfoliation as evidenced by the disappearance of clay diffraction at 2θ = 2.5-10°.

Synthesis and Characterization of Luminescence Eu3+/Polyurethane Composite Material

2014 ◽  
Vol 884-885 ◽  
pp. 247-250 ◽  
Author(s):  
Kai Sheng ◽  
Jie Lin Wang ◽  
Ying Li ◽  
Yi Han Wang ◽  
Meng Xue Xu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Composite Material ◽  
Rare Earth ◽  
Hybrid Materials ◽  
Chain Extender ◽  
Synthesis And Characterization ◽  
Rare Earth Ion ◽  
Polyurethane Composite ◽  
Small Molecule Ligands

Selecting lactam 2,6-pyridinedicarboxamide (PDCA) as the ligand and 1,4-butanediol as chain extender, we prepare polyurea polyurethane PDCA-PU; then, introduction of rare earth ion Eu3+ and small molecule ligands 1,10-phenanthroline (phen), synthesized binary and ternary polyurethane composite containing Eu3+, and comparing the fluorescence properties of the material. We investigated the thermal stability and luminescence properties of hybrids and found that the ternary hybrid materials exhibit better thermal stability and stronger emission intensity.

Synthesis and Characterization of Temperature-Sensitive TSPU/PNIPAAm Semi-IPN Polymer

2011 ◽  
Vol 399-401 ◽  
pp. 359-362 ◽  
Author(s):  
Yi Chun Wang ◽  
Zheng Wei Dai ◽  
Yuan Xue
Keyword(s):  
Chemical Structure ◽  
In Situ Polymerization ◽  
Phenyl Isocyanate ◽  
Chain Extender ◽  
Synthesis And Characterization ◽  
Temperature Sensitive ◽  
Sensitive Material ◽  
Ft Ir

Thermo-sensitive polyurethane (TSPU) was synthesized from poly(ε-caprolactone) and 4,4’-methylenebis (phenyl isocyanate) by a two-step process with 1,4-butanediol as the chain extender. Following that, a novel temperature-sensitive material was created by the strategy of IPN from TSPU and PNIPAAm in the method of in situ polymerization. The chemical structure and thermo properties of the semi-IPN were characterized with FT-IR and DSC. The results prove that intensive inter-molecular interactions exist between TSPU and PNIPAAm chains, which have significant influence on the phase transition behaviors of the material. According to these results, the transition temperature of the semi-IPN can be adjusted in the range of 30~40 °C by controlling the composition of TSPU and the semi-IPNs.

scholarly journals The synthesis and characterization of 2-mercaptoethyl methacrylate

2005 ◽  
Vol 59 (11-12) ◽  
pp. 321-323 ◽  
Author(s):  
Marija Knezevic ◽  
Lynne Katsikas ◽  
Ivanka Popovic
Keyword(s):  
Gas Chromatography ◽  
Ftir Spectroscopy ◽  
Methacrylic Acid ◽  
Acetyl Chloride ◽  
Chain Transfer ◽  
Chain Transfer Agent ◽  
Synthesis And Characterization ◽  
H Nmr ◽  
A Chain

The synthesis of 2-mercaptoethyl methacrylate from methacrylic acid and 2-mercaptoethanol by etherification using acetyl chloride as catalyst was optimized. The purity of the obtained product was controlled by gas chromatography and its identity confirmed by H-NMR and FTIR spectroscopy. 2-Mercapto-ethyl methacrylate could find application as a chain transfer agent in radical polymerizations.

Synthesis and characterization of radiopaque poly(ether urethane) with iodine-Containing diol as chain extender

2011 ◽  
Vol 49 (10) ◽  
pp. 2191-2198 ◽  
Author(s):  
Weiqiang Qu ◽  
Weijuan Xia ◽  
Chao Feng ◽  
Xinlin Tuo ◽  
Teng Qiu
Keyword(s):  
Chain Extender ◽  
Synthesis And Characterization
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