Synthesis and Properties of Acrylate Modified Waterborne Polyurethane Emulsion

2012 ◽  
Vol 535-537 ◽  
pp. 1386-1392 ◽  
Author(s):  
Liang Fei
Keyword(s):  
Mechanical Properties ◽  
Water Resistance ◽  
Waterborne Polyurethane ◽  
Experimental Results ◽  
Polymerization Temperature ◽  
Core Shell ◽  
Structures And Properties ◽  
Resistance Stability ◽  
Shell Composite

Acrylate modified waterborne polyurethane (PUA) emulsion was prepared by means of core-shell polymerization processes. The structures and properties of emulsions were characterized by FTIR, TEM and DSC. The effects of polymerization temperature, the type and amount of initiator and the acrylic amount on the properties of emulsions were investigated. The experimental results showed that the emulsions prepared were core-shell composite, when the polymerization temperature was 70~75 °C, using oil-soluble initiator azobisisobutyronitrile (AIBN), and the percentage of AIBN was 2.0%~ 2.5%, the properties of the emulsion can be better, and the water resistance, stability and mechanical properties of the PUA films were improved increasingly.

Physico‐mechanical properties and flammability of PUR/PIR foams containing expandable graphite core‐shell composite particles

2019 ◽  
Vol 40 (10) ◽  
pp. 3805-3813 ◽  
Author(s):  
Kamila Gosz ◽  
Józef Haponiuk ◽  
Aleksandra Mielewczyk‐Gryń ◽  
Łukasz Piszczyk
Keyword(s):  
Mechanical Properties ◽  
Composite Particles ◽  
Expandable Graphite ◽  
Core Shell ◽  
Shell Composite

scholarly journals Preparation and Mechanical Properties of Impact Resistance Acryl Resin Using Core-Shell Composite Nanoparticles

2007 ◽  
Vol 63 (11) ◽  
pp. 247-251 ◽  
Author(s):  
Kazuki Daimatsu ◽  
Hideki Sugimoto ◽  
Eiji Nakanishi ◽  
Tetsushi Akasaka ◽  
Katsuhiro Inomata
Keyword(s):  
Mechanical Properties ◽  
Impact Resistance ◽  
Composite Nanoparticles ◽  
Core Shell ◽  
Shell Composite

Research on Preparation and Properties of New Type Desulfurization Gypsum Block

2014 ◽  
Vol 540 ◽  
pp. 217-220
Author(s):  
Chuan Wei Du ◽  
Ying Lv ◽  
Guo Zhong Li
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Water Resistance ◽  
Experimental Results ◽  
New Type ◽  
Cementing Material ◽  
The Impact

Desulfurization building gypsum was used as the main gelled material and fly ash was used as filler to prepare the new type desulfurization gypsum block. the mechanical properties of the new type desulfurization gypsum block was improved by adding compound excitation agent into the desulphurization gypsum-fly ash cementing material to stimulate its activity. The water resistant performance of the new type desulfurization gypsum block was improved through adding wax-alcohol compound waterproofing agent into it. Experimental results show that when the filling amount of fly ash was 20%(the quality of desulfurization gypsum), the impact on the strength of gypsum was minimal; when the dosage of compound excitation agent was 1.75%, the excitation effect of desulphurization gypsum-fly ash cementing material was best; when the dosage of wax-alcohol compound waterproofing agent was 0.4%, the water resistance of new desulfurization gypsum block was optimal.

Properties and Application of Waterborne Polyurethane/starch Composite Surface Sizing Agent

2011 ◽  
Vol 317-319 ◽  
pp. 15-18 ◽  
Author(s):  
Yu Hua Guo ◽  
Shu Cai Li ◽  
Gao Sheng Wang
Keyword(s):  
Mechanical Properties ◽  
Water Resistance ◽  
Waterborne Polyurethane ◽  
Polymerization Process ◽  
Composite Surface ◽  
Surface Sizing ◽  
End Capping ◽  
Development Prospects

TDI as main isocyanate, IPDI as end-capping reagent, waterborne polyurethane (WPU) surface-sizing agent have been obtained by a pre–polymerization process. WPU were mixed with starch SSA in different proportion and a composite sizing agent obtained. It is indicated the water resistance, gloss and folding resistance of WPU/starch sized papers are much higher than starch sized papers. The ink absorption obviously decreases and the mechanical properties wholly increase. WPU/starch composite emulsions is a new kind of surface sizing agent having broad development prospects.

Magnetic Properties of Fe3O4/CoFe2O4 Composite Nanoparticles with Core/Shell Architecture

2020 ◽  
Vol 65 (10) ◽  
pp. 904
Author(s):  
V. O. Zamorskyi ◽  
Ya. M. Lytvynenko ◽  
A. M. Pogorily ◽  
A. I. Tovstolytkin ◽  
S. O. Solopan ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Spinel Ferrite ◽  
Composite Nanoparticles ◽  
Core Shell ◽  
Cofe2o4 Nanoparticles ◽  
Core Diameter ◽  
The Core ◽  
Shell Particles ◽  
Interface Parameters ◽  
Shell Composite

Magnetic properties of the sets of Fe3O4(core)/CoFe2O4(shell) composite nanoparticles with a core diameter of about 6.3 nm and various shell thicknesses (0, 1.0, and 2.5 nm), as well as the mixtures of Fe3O4 and CoFe2O4 nanoparticles taken in the ratios corresponding to the core/shell material contents in the former case, have been studied. The results of magnetic research showed that the coating of magnetic nanoparticles with a shell gives rise to the appearance of two simultaneous effects: the modification of the core/shell interface parameters and the parameter change in both the nanoparticle’s core and shell themselves. As a result, the core/shell particles acquire new characteristics that are inherent neither to Fe3O4 nor to CoFe2O4. The obtained results open the way to the optimization and adaptation of the parameters of the core/shell spinel-ferrite-based nanoparticles for their application in various technological and biomedical domains.

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