Graft polymerization of methacrylic acid to polycaproamide using a redox system containing Cu2+ ions

1995 ◽  
Vol 27 (1) ◽  
pp. 27-31
Author(s):  
N. V. Smirnova ◽  
G. A. Gabrielyan
Keyword(s):  
Methacrylic Acid ◽  
Graft Polymerization ◽  
Redox System

The Effects of the Reaction Conditions on the Grafting Degree of SiO2-g-PMAA Particle

2012 ◽  
Vol 581-582 ◽  
pp. 301-304
Author(s):  
Ke Hong Zhang ◽  
Hui Xiao ◽  
Jun Juan Du
Keyword(s):  
Silica Gel ◽  
Reaction Temperature ◽  
Methacrylic Acid ◽  
Graft Polymerization ◽  
Monomer Concentration ◽  
Reaction Conditions ◽  
Grafted Polymer ◽  
Limiting Value ◽  
Methacryloxypropyl Trimethoxysilane ◽  
Grafting Degree

Modified MPS-SiO2 particle was obtained by the bonding of 3-methacryloxypropyl trimethoxysilane (KH-570) on the surface of silica gel particle. The methacrylic acid (MMA) monomers were grafted on the surface of MPS-SiO2 particle to prepare the grafting particles SiO2-g-PMAA. The effects of reaction conditions on the graft degree were explored. The results indicate that the MMA monomers can be easily grafted on the surface of silica gel particle by using the method of graft polymerization. During the graft polymerization, the grafted polymer layer is a hindrance to the subsequent graft polymerization. Then the grafting degree of the polymer under a certain condition has a limiting value. The reaction conditions, such as monomer concentration, the amount of initiator, reaction temperature, have remarkably influence on the graft polymerization of SiO2-g-PMAA.

scholarly journals Graft polymerization of methyl methacrylate onto silk fibers with Ce(VI)–sucrose redox system

1983 ◽  
Vol 28 (5) ◽  
pp. 1811-1813 ◽  
Author(s):  
Nrusinha P. Padhi ◽  
S. S. Tripathy ◽  
S. Jena ◽  
B. C. Singh
Keyword(s):  
Methyl Methacrylate ◽  
Graft Polymerization ◽  
Redox System ◽  
Silk Fibers

scholarly journals Synthetized Potato Starch—A New Eco Sizing Agent for Cotton Yarns

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 908
Author(s):  
Stana Kovačević ◽  
Ivana Schwarz ◽  
Suzana Đorđević ◽  
Dragan Đorđević
Keyword(s):  
Methacrylic Acid ◽  
Graft Polymerization ◽  
Potato Starch ◽  
Potassium Persulfate ◽  
Synthesis Methods ◽  
Basic Principles ◽  
Film Forming ◽  
Cotton Yarns ◽  
Hydrolysis Of ◽  
Derivatives Of

The objective of this research was to verify the feasibility of the use of newly synthesized biopolymer materials for sizing cotton yarns based on the basic principles of chemical modification. Research included acid hydrolysis of potato starch up to controlled molar masses together with graft-polymerization and methacrylic acid onto hydrolyzed starch to improve hydrophilicity and solubility, to increase the capability of film forming, to increase adhesive potential and to avoid retrogradation phenomena. Research objectives were primarily focused on finding an appropriate, environmentally-friendly and productive sizing agent for cotton yarns via the analysis and systematization of a large number of synthesis methods in conjunction with the characterization and properties of graft-copolymers. The research results showed that potassium persulfate initiator was most efficient in grafting of methacrylic acid onto hydrolyzed starch, while azobisisobutyronitrile (AIBIN) initiator was most efficient in grafting of acrylic acid (AC). FTIR analysis confirmed that new and efficient products for sizing cotton yarns from synthetized potato starch were obtained. Research on rheological properties of copolymers shows a higher viscosity of grafted products indicating the good stability of potential starches. Ecological improvements have been established through high desizing degree as well as improvements in physical-mechanical properties of yarn, abrasion resistance and decrease in yarn surface hairiness were noticed. The use of new derivatives of potato starch, especially of hydrolyzed starch grafted with methacrylic acid (MAA), potassium persulfate (KPS) as initiator, was confirmed. Anova statistical analysis determined the influence of the entire sizing process on individual yarn parameters.

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