Synthesis and Characterization of Oxazepine and Oxazepane from reaction of 2-(2- Amino - ethylimino)-5,5- diethyl-pyrimidine-4,6- dione and 2-[2-(5,5- diethyl -4,6 - dioxo - pyrimidine -2- ylideneamino) - ethylimino] -5,5- diethyl-dihydro- pyrimidine - 4,6 -dione with maleic and succinic anhydride

2006 ◽  
Vol 9 (2) ◽  
pp. 7-17
Author(s):  
Waleed F. Al-Hity ◽  
◽  
Mohammed. A Al-Hadithi ◽  
Keyword(s):  
Succinic Anhydride ◽  
Synthesis And Characterization

Synthesis and Characterization of Carboxyl-Terminated Hyperbranched Polyester

2014 ◽  
Vol 665 ◽  
pp. 327-330
Author(s):  
Shi Jie Niu ◽  
Jian Wang ◽  
Yu Qing Bai ◽  
Ming Tao Run
Keyword(s):  
Glass Transition ◽  
Sodium Acetate ◽  
Succinic Anhydride ◽  
Molar Ratio ◽  
Synthesis And Characterization ◽  
Hydroxyl Groups ◽  
Hyperbranched Polyester ◽  
End Groups ◽  
Lower Glass Transition Temperature

In order to prepare carboxyl-terminated hyperbranched polyester (HBP-COOH), succinic anhydride was used to modify hydroxyl-terminated hyperbranched polyester (HBP-OH), and the influences of the solvents, catalysts and time on the product’s structure were investigated. When THF is used as the solvent, sodium acetate as the catalyst, the molar ratio of succinic anhydride and hydroxyl groups is 3:1, and the reaction time is 6 h at 65°C, the modification extent of the hydroxyl groups is about 99% with about 95% yield. HBP-COOH has much lower glass transition temperature than that of HBP-OH due to its long and flexible end-groups.

scholarly journals Synthesis and Characterization of Copoly(succinic anhydride-ethylene oxide)-Poly(L-lactide) Block Copolymer

2000 ◽  
Vol 32 (4) ◽  
pp. 307-315 ◽  
Author(s):  
Yasukatsu Maeda ◽  
Atsuyoshi Nakayama ◽  
Ioannis Arvanitoyannis ◽  
Norioki Kawasaki ◽  
Kazuko Hayashi ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Ethylene Oxide ◽  
Succinic Anhydride ◽  
Synthesis And Characterization

Synthesis and Characterization of β-Cyclodextrin Microspheres with Temperature and pH Sensibility

2012 ◽  
Vol 583 ◽  
pp. 391-394 ◽  
Author(s):  
Qiang Zhang ◽  
Li Qin You ◽  
Chun Shan Zhu
Keyword(s):  
Phase Transition ◽  
Grain Size ◽  
Succinic Anhydride ◽  
Ph Value ◽  
Synthesis And Characterization ◽  
Ph Values ◽  
Swelling Rate

The β-CD/NIPAAm-SA microspheres with temperature and pH sensibility were synthesized with β-cyclodextrin(β-CD), N-isopropylacrylamide(NIPAAm) and succinic anhydride(SA), and their drug-releasing properties were investigated. SEM showed that the β-CD/NIPAAm-SA microspheres had a good sphericity and a grain size of 200-300µm.And the swelling results indicated that the swelling rate was decreased with temperature raising and increased with pH value improving, and the phase transition volume changed suddenly at the temperature of about 27°C and 38°C, and the pH values of about 1.4 and 7.4. It revealed that the β-CD/NIPAAm-SA microspheres had pH and temperature sensibilities.

Synthesis and Characterization of 13C-labeled Alkenyl Succinic Anhydride (ASA) with Defined Double Bond Location

2014 ◽  
Vol 18 (9) ◽  
pp. 1208-1217
Author(s):  
Elisabeth Lackinger ◽  
Markus Bacher ◽  
Jurgen Sartori ◽  
Thomas Zweckmair ◽  
Antje Potthast ◽  
...  
Keyword(s):  
Double Bond ◽  
Succinic Anhydride ◽  
Synthesis And Characterization ◽  
Alkenyl Succinic Anhydride
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