Novel biodegradable superabsorbent hydrogels derived from cotton cellulose and succinic anhydride: Synthesis and characterization

2006 ◽  
Vol 99 (6) ◽  
pp. 3251-3256 ◽  
Author(s):  
Toshio Yoshimura ◽  
Kaori Matsuo ◽  
Rumiko Fujioka
Keyword(s):  
Succinic Anhydride ◽  
Cotton Cellulose ◽  
Synthesis And Characterization ◽  
Superabsorbent Hydrogels

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 Gelatin-Based Crosslinkers for the Fabrication of Superabsorbent Hydrogels

Materials ◽  
2017 ◽  
Vol 10 (7) ◽  
pp. 826 ◽  
Author(s):  
Penphitcha Amonpattaratkit ◽  
Sureerat Khunmanee ◽  
Dong Kim ◽  
Hansoo Park
Keyword(s):  
Synthesis And Characterization ◽  
Superabsorbent Hydrogels

scholarly journals synthesis Synthesis and Characterization ( Oxazepine , Thiazine and Quinazoline ) Derivatives and Study the Biological Activity as Antibacteria

2021 ◽  
Vol 26 (4) ◽  
Author(s):  
Shaimaa Adnan ◽  
Adel jasim
Keyword(s):  
Schiff Base ◽  
Biological Effect ◽  
Heterocyclic Compounds ◽  
Succinic Anhydride ◽  
Synthesis And Characterization ◽  
Second Step ◽  
Base Derivative ◽  
Ft Ir ◽  
Quinazoline Derivatives ◽  
Amino Benzoic Acid

This research. Included the preparation. and characterization some novel. Six and seven membered Heterocyclic. Compounds ( oxazepine , thiazine , quinazoline ) The first step in clode react 2-amino-6- methoxybenzothiazole with 4- amino acetophenone to get Schiff base derivative (1). The second step react (1) with 4 -hydroxy acetophenone to get schiff base derivative (2) the last step involve react (2) with ( Phthalic , Maleic , Succinic) anhydride to .get oxazepine derivatives (3,4and 5) also react (2) with(2-amino benzoic acid) and (2-mercaptobenzoic acid ) to get quinazoline (6)and thiazine (7) derivatives respectively .the physical; properties of the prepared; These Compounds. Were Identification (FT-IR) ,(1H-NMR) and (13C-NMR) by spectroscopy thene study their biological effect on two types of bacteria Staphylococcus aureuses (Gram positive) and Escherichia coli (Gram Negative)

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