Spectroscopic Analyses on Chain Structure and Thermal Stabilization Behavior of Acrylonitrile/Methyl Acrylate/Itaconic Acid-based Copolymers Synthesized by Aqueous Suspension Polymerization

2018 ◽  
Vol 19 (10) ◽  
pp. 2007-2015 ◽  
Author(s):  
Do Un Park ◽  
Nam Koo Han ◽  
Ji Hyeong Ryu ◽  
Won Ho Park ◽  
Young Gyu Jeong
Keyword(s):  
Itaconic Acid ◽  
Methyl Acrylate ◽  
Suspension Polymerization ◽  
Aqueous Suspension ◽  
Thermal Stabilization ◽  
Chain Structure ◽  
Spectroscopic Analyses

Validation of the Pseudo Imprinted Microspheres for Solid-Phase Extraction of Acyclovir from Swine Tissue

2011 ◽  
Vol 393-395 ◽  
pp. 1591-1594
Author(s):  
Feng Xia Qiao ◽  
Hong Yuan Yan
Keyword(s):  
Solid Phase Extraction ◽  
Solid Phase ◽  
Suspension Polymerization ◽  
Aqueous Suspension ◽  
Selective Extraction ◽  
Phase Extraction ◽  
Matrix Interferences ◽  
The Matrix ◽  
Extraction Volume ◽  
Swine Tissue

The novel pseudo imprinted microspheres were synthesized by aqueous suspension polymerization using theophylline as the template and employed as a special sorbent of solid-phase extraction for selective extraction of acyclovir from swine tissue. The pseudo imprinted microspheres revealed high affinity and selectivity to acyclovir, and the matrix interferences could be efficiently eliminated, which make the extract of solid-phase extraction clean enough for HPLC analysis. The parameters that affect the extraction efficiency of solid-phase extraction were investigated, including solvent of extraction, volume of loading sample, washing and elution solvent, etc. Good linearity was obtained in a range of 0.05~15 μg/mL with correlation coefficient (r2) of 0.9991. The recoveries at three spiked levels were ranged from 91.4% to101.0% with RSD less than of 5.0%.

scholarly journals Mesoporous Palladium N,N’-Bis(3-Allylsalicylidene)o-Phenylenediamine-Methyl Acrylate Resins as Heterogeneous Catalysts for the Heck Coupling Reaction

Materials ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 2612
Author(s):  
Claudio Mella ◽  
Cecilia C. Torres ◽  
Gina Pecchi ◽  
Cristian H. Campos
Keyword(s):  
Methyl Acrylate ◽  
Heterogeneous Catalysts ◽  
Suspension Polymerization ◽  
Metal Chelate ◽  
Reaction Medium ◽  
Coupling Reaction ◽  
Analytical Techniques ◽  
Catalytic Performance ◽  
Catalyst Stability ◽  
Heck Coupling

Palladium N,N’-bis(3-allylsalicylidene)o-phenylenediamine complex (PdAS) immobilized onto mesoporous polymeric methyl acrylate (MA) based resins (PdAS(x)-MA, x = 1, 2, 5, or 10 wt.%) were successfully prepared as heterogeneous catalysts for the Heck reaction. The catalysts were synthesized via radical suspension polymerization using PdAS as a metal chelate monomer, divinylbenzene and MA as co-monomers. The effect of the PdAS(x) content on the physicochemical properties of the resins is also reported. The catalysts were characterized by using a range of analytical techniques. The large surface area (>580 m2·g−1) and thermal stability (up to 250 °C) of the PdAS(x)-MA materials allows their application as catalysts in the C–C coupling reaction between iodobenzene and MA in the presence of trimethylamine at 120 °C using DMF as the solvent. The PdAS(10)-MA catalyst exhibited the highest catalytic performance with no significant catalytic loss being observed after five reuses, thereby indicating excellent catalyst stability in the reaction medium.

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