Poly(sulfobetaine)s and corresponding cationic polymers. VIII. Synthesis and aqueous solution properties of a cationic poly(methyl iodide quaternized styrene-n,n-dimethylaminopropyl maleamidic acid) copolymer

2001 ◽  
Vol 80 (10) ◽  
pp. 1619-1626 ◽  
Author(s):  
Wen-Fu Lee ◽  
Yan-Ming Chen
Keyword(s):  
Aqueous Solution ◽  
Methyl Iodide ◽  
Solution Properties ◽  
Cationic Polymers ◽  
Acid Copolymer

Studies on Grafting Copolymerization of Lactic Acid onto Cornstarch Catalyzed with Sodium Hydroxide

2011 ◽  
Vol 233-235 ◽  
pp. 1906-1910
Author(s):  
Ying Mo Hu ◽  
Qing Ling Wang ◽  
Jian Hua Zhu ◽  
Yang Liu ◽  
Xue Yang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Lactic Acid ◽  
Sodium Hydroxide ◽  
Convenient Method ◽  
Graft Copolymerization ◽  
Good Adhesion ◽  
Acid Copolymer ◽  
Grafting Copolymerization ◽  
Grafting Degree

A convenient method to synthesize starch/lactic acid copolymer was studied in this work. Copolymer of starch graft with lactic acid (LA) was directly prepared by reaction of cornstarch with lactic acid in sodium hydroxide (NaOH) aqueous solution as a catalyst. The product was characterized by IR and WAXD, and the good adhesion between the two components has been observed by SEM. The results showed that the highest grafting degree could reach 33.60% when the graft copolymerization was carried in 0.40 mol·L-1 NaOH aqueous for 9 h at 90°C with the 1: 5~6 ratio of starch and lactic acid.

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