scholarly journals Synthesis and Swelling Behavior of Super-Absorbent Soluble Starch-g -poly(AM-co -NaAMC14 S) Through Graft Copolymerization and Hydrolysis

2019 ◽  
pp. 1800272 ◽  
Author(s):  
Guihong Lan ◽  
Ming Zhang ◽  
Yongqiang Liu ◽  
Haiyan Qiu ◽  
Songsong Xue ◽  
...  
Keyword(s):  
Graft Copolymerization ◽  
Soluble Starch ◽  
Swelling Behavior

Graft copolymerization of different mixtures of acrylic monomers on amylopectin. Swelling behavior

1994 ◽  
Vol 54 (5) ◽  
pp. 577-584 ◽  
Author(s):  
I. Castellano ◽  
B. Pascual ◽  
B. Vazquez ◽  
I. Goñi ◽  
M. Gurruchaga
Keyword(s):  
Graft Copolymerization ◽  
Swelling Behavior ◽  
Acrylic Monomers

scholarly journals Chemical Modification of Chitosan in order to Inverse Swelling Behavior: Comparison between Crosslinking, Michael Addition and Graft Copolymerization Reactions

2015 ◽  
Vol 18 (2) ◽  
pp. 110-117
Author(s):  
Solmaz Zakhireh ◽  
Mehrdad Mahkam ◽  
Yousef Toomari ◽  
Saeed Jafarirad
Keyword(s):  
Acrylic Acid ◽  
Michael Addition ◽  
Graft Copolymerization ◽  
Addition Reaction ◽  
Pharmaceutical Journal ◽  
Swelling Behavior ◽  
Michael Addition Reaction ◽  
The Third ◽  
The Michael Addition ◽  
Amino Benzoic Acid

In the present work, three methods were used to inverse chitosan swelling behavior including, conjugation of p-amino benzoic acid (PABA) on cross-linked chitosan in different condition, Michael addition reaction of acrylic acid (AA) on chitosan and finally graft copolymerization of methacrylic acid (MMA) on chitosan. We couldn’t inverse chitosan swelling behavior by the Michael addition reaction of acrylic acid, but conjugation of PABA on cross-linked chitosan inversed the chitosan swelling behavior. In addition, the graft copolymerization of MMA on chitosan was also successful. In general, the third method, among the above-mentioned modifications provided the best results.Bangladesh Pharmaceutical Journal 18(2): 110-117, 2015

Swelling behavior and viscoelastic properties of a polyacetal hydrogel

2008 ◽  
Vol 33 (5) ◽  
pp. 387-395
Author(s):  
Hayet Bendaikha ◽  
Saliha Chaoui ◽  
Seghier Ould Khada ◽  
Abdelghani Krallafa
Keyword(s):  
Viscoelastic Properties ◽  
Swelling Behavior

Radiation Induced Graft Copolymerization of Vinyl Acetate and Isopropenyl Acetate Onto Isotactic Polypropylene

1996 ◽  
Vol 61 (2) ◽  
pp. 259-267 ◽  
Author(s):  
Bhupendra N. Misra ◽  
G. S. Chauhan ◽  
Inderjeet Kaur
Keyword(s):  
Vinyl Acetate ◽  
Isotactic Polypropylene ◽  
Graft Copolymerization ◽  
Optimum Conditions ◽  
Reaction Parameters ◽  
Maximum Percentage ◽  
Radiation Induced ◽  
Isopropenyl Acetate

Radiation-induced graft copolymerization of vinyl acetate (VAC) and isopropenyl acetate (PAC) onto isotactic polypropylene (IPP) has been studied. The percentage of grafting was calculated for various reaction parameters, and the optimum conditions for attaining the maximum percentage of grafting were determined. Maximal achieved extents of grafting are 39% and 29% for VAC and PAC, respectively. The reactivity of the two monomers with respect to grafting is discussed.

DETERMINATION OF A SUITABLE CONDITION OF GRAFT COPOLYMERIZATION OF VINYLTRIETHOXYSILANE ONTO NR TO FORM NANOMATRIX STRUCTURE

2018 ◽  
Vol 91 (4) ◽  
pp. 767-775 ◽  
Author(s):  
Yuanbing Zhou ◽  
Yoshimasa Yamamoto ◽  
Seiichi Kawahara
Keyword(s):  
Silica Nanoparticles ◽  
Graft Copolymerization ◽  
Monomer Concentration ◽  
Minor Component ◽  
Suitable Condition ◽  
Average Diameter ◽  
Silica Matrix ◽  
Rubber Particles ◽  
Hydrolysis And Condensation ◽  
Nanomatrix Structure

ABSTRACT Graft copolymerization of vinyltriethoxysilane (VTES) onto NR particles in the latex stage is a unique reaction, since it occurs together with hydrolysis and condensation of the triethoxysilane group of VTES to form a colloidal silica linking to the rubber particles. These reactions may contribute to the formation of a silica nanomatrix structure that consists of a dispersoid of rubber particles as the major component and a silica matrix as the minor component. Here, the graft copolymerization of VTES followed by hydrolysis and condensation is investigated to determine a suitable condition to prepare NR with a silica nanomatrix structure. The mechanical properties of the resulting graft copolymer are discussed in relation to the morphology, silica content, and gel content of the rubber. Based on morphological observations, NR particles with an average diameter of approximately 1 μm are well dispersed in a nanomatrix consisting of silica nanoparticles. The thickness of the silica nanomatrix increases as the monomer concentration increases, and a long incubation time generates large silica nanoparticles. The tensile strength and viscoelastic properties are significantly improved by forming the silica nanomatrix structure, with its continuous structure that prevents the NR particles from merging.

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