A transition at about room temperature was attributed to the β transition of polypropylene; another transition at a higher temperature is due to the superposition of the glass transition of polyacrylic acid and of the α transition of polypropylene: the presence of polypropylene causes the glass ...
In our previous work [20] such an approach was applied for determining polyacrylic acid (PAA) structure in aqueous solutions for various ionic strength and pH. The goal of the present work is to determine theoretically and experimentally the structure of PSS molecules in electrolyte solutions, and...
However, when the solution is acidified to pH = 4·5, instead of globules, as is the case for polyacrylic acid, polyglutamic acid forms a fibrillar structure, a photograph ofwhich is given in Figure 11b. Well-formed fibrils can be seen to have appeared approximately of the same size, ...
Phase separations of gelling solutions have been investigated for acid-catalyzed, alkoxysilane-based systems containing polyacrylic acid (HPAA). Gels with ... NN Soga - Journal of Non-Crystalline Solids 被引量: 432发表: 1992年 Monodisperse porous polymer particles: Formation of the porous structure ...
The structure and properties of the ... HS Samanta,SK Ray - 《Carbohydrate Polymers》 被引量: 10发表: 2014年 Synthesis And Characterization Of Ph And Temperature Sensitive Polyacrylic Acid / Pluronics F127 Based Interpenetrating Hydrogels During polymerization CS was incorporated in situ in the ...
Chitosan (CS) and polyacrylic acid (PAA) solution through the layer-by-layer self-assembly are deposited on the surface of the tapered fiber encapsulated with a V-type quartz groove to determine the concentration of copper ions (Cu2+).Under the acidic condition provided by the PAA solution, ...
Polyacrylic Acid | Properties, Copolymers & Examples Acrylic Polymer | Overview, Definition & Types Aliphatic Polyester: Definition, Producers & Examples How to Turn Milk into Plastic - Science Experiment Copolymer Definition, Classification & Examples Create an account to start this course today Used...
PPPolypropylene CH 2 CH CH 3 n PIBPolyisobutylene Polyacrylicacid PMMA Polymethylmethacrylate CH 2 C CH 3 n CH 3 CH 2 C C n H OH O CH 2 C C n CH 3 O O CH 3 PVAc Polyvinyl acetate PVME Polyvinyl methyl ether CH 2 C C n H O CH 3 O PB Polybutadiene CH 2 CH CH CH 2 n...
It is shown that acrylic superplasticizers display lower molar mass and are built from polyacrylic backbone chains and a higher number of shorter polyoxyethylene side chains. The efficiency o superplasticizers has been measured through their hydrophilicity, defined as the absorbance ratio of the ether ba...
Contradicting the conventional knowledge, we find that no protective interphase forms, owing to the sustained reactions between deposited Li dendrites and polyacrylic backbones and succinonitrile plasticizer. Due to the reaction-induced volume change, large amounts of cracks form inside the Li dendrites ...