scholarly journals Preparation and Properties of Polyester Modified Waterborne High Hydroxyl Content and High Solid Content Polyacrylate Emulsion

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 636 ◽  
Author(s):  
Zhewen Zhu ◽  
Chaoying Zhang ◽  
Shuling Gong
Keyword(s):  
Chain Transfer ◽  
Unsaturated Polyester ◽  
Impact Resistance ◽  
Solid Content ◽  
High Solid Content ◽  
Acrylate Monomer ◽  
Film Properties ◽  
Hydroxyl Content ◽  
Acrylate Emulsion ◽  
Better Than

A high hydroxyl content waterborne polyester-acrylate emulsion was successfully synthesized in two steps. Firstly, the carboxyl terminated unsaturated polyester was synthesized, then it was reacted as a monomer with acrylate monomer by emulsion polymerization using the semi-continuous seeded method. The effects of the amount of hydroxyethyl methacrylate (HEMA), the ratio of polyester/acrylic, the ratio of soft/hard monomer, and the content of chain transfer agent to the properties of the composite emulsion were investigated. Through a variety of tests, both the emulsion and film properties of the composite emulsion were better than polyacrylate emulsion. The introduction of polyester improved the flexibility and impact resistance of hydroxyl acrylate film, and made the modified resin have advantages of both.

A Novel Green Tape with High Solid Content Prepared by Aqueous Tape-Casting

2010 ◽  
Vol 150-151 ◽  
pp. 646-650
Author(s):  
Shuang Xi Wang ◽  
Xue Qiong Ouyang ◽  
Ya Dong Wang ◽  
Qiong Na Zheng ◽  
Jing You
Keyword(s):  
Polyvinyl Alcohol ◽  
Smooth Surface ◽  
Tape Casting ◽  
Solid Content ◽  
High Solid Content ◽  
Casting Method ◽  
Green Tape ◽  
High Solid ◽  
Acrylate Emulsion

Green tapes were prepared by aqueous tape-casting method with binders of polyvinyl alcohol, styrene-acrylate emulsion and the mixed binders, respectively. Effects of solid content and binders on viscosity of the slurry were investigated by digital rotary viscosimeter. Results show that solid content should be lower than 60wt % with the binder of PVA; solid content could achieve the maximum 73wt% by tape-casting using emulsion as binder. Furthermore, slurry with solid content up to 75wt % had been successfully prepared by tape-casting using mixed binders. Mixed binders are promising additives to produce high solid content green tapes with smooth surface, adequate strength and very good flexibility.

Plasticization by in Situ Grafted Acrylates II—Effect of Graft Structure

1985 ◽  
Vol 58 (1) ◽  
pp. 146-153
Author(s):  
Roger J. Eldred
Keyword(s):  
Low Temperature ◽  
Chain Transfer ◽  
Direct Result ◽  
Acrylate Monomer ◽  
A Chain ◽  
Low Temperature Flexibility ◽  
Acrylate Monomers ◽  
Better Than ◽  
Transfer Agents

Abstract Grafting of acrylate monomers, such as 2-ethylhexyl acrylate, onto nitrile rubber during the cure cycle leads to improved low temperature flexibility. The effect of graft structure on the improvement was determined by utilizing chain transfer agents to reduce the molecular weight and increase the number of grafts. In every instance, incorporation of a chain transfer agent led to a compound with greater low-temperature flexibility than a control. The amount of improvement was correlated with the effectiveness of each additive in chain transfer reactions. Since there was no evidence of either degradative chain transfer or changes in cure state, it was concluded that the increased low-temperature flexibility was a direct result of alterations in the graft structure. The plasticization achieved with chain transfer agents and 2-ethylhexyl acrylate monomer was better than previously obtained using more effective acrylic monomers without the additives. This means that the structure of the graft is the major factor in determining the effectiveness of in situ grafted acrylate monomers as plasticizers.

scholarly journals Iron absorption from maize (Zea mays) and sorghum (Sorghum vulgare) beer

1980 ◽  
Vol 43 (2) ◽  
pp. 271-279 ◽  
Author(s):  
D. P. Derman ◽  
T. H. Bothwell ◽  
J. D. Torrance ◽  
W.R. Bezwoda ◽  
A. P. Macphail ◽  
...  
Keyword(s):  
Zea Mays ◽  
Lactic Acid ◽  
Acid Solution ◽  
Iron Absorption ◽  
Solid Material ◽  
Solid Content ◽  
High Solid Content ◽  
Sorghum Vulgare ◽  
The Mean ◽  
Better Than

1. Iron absorption from maize (Zea mays) and sorghum (Sorghum vulgore) beer was more than twelvefold greater than from a gruel made from the constituents used to prepare the beer.2. The effect of changes occurring during brewing were investigated. These changes include a decrease in the solid content, and the formation of 30 ml ethanol/l and 5 ml lactic acid/].3. The presence of solid material was found to inhibit Fe absorption markedly, especially when the solid content was 100 g/l or more.4. The presence of ethanol potentiated Fe absorption but the effect was only modest in gruels with a high solid content.5 Fe absorption from a 2 ml lactic acid/] solution was four-fold greater than from a hydrochloric acid solution of the same pH. When lactic acid was added to a gruel containing 200 8 solids/l the mean absorbtion rose from 0.4 to 1.2%.6. In a direct comparison, Fe absorption from beer was significantly better than from a gruel of similar pH containing lactic acid.7. The results suggest that at least three factors are responsible for the enhanced Fe absorption from maize and sorghum beer. These include the removal of solids during fermentation and the presence of ethanol and of lactic acid in the final brew.8. In order to reproduce the way in which beer is brewed domestically in Fe containers, a study was done in which beer was prepared in the presence of Fe wire. Under such circumstances Fe was rapidly dissolved and the final Fe concentration of the brew was 89 mg/l. However, the nature of the Fecontaining compound or compounds was not elucidated.

Synthesis and properties of CO2 copolymer-based waterborne polyurethane with high solid content

2021 ◽  
Vol 28 (7) ◽  
Author(s):  
Wenqi Xian ◽  
Jie Yuan ◽  
Zhengbin Xie ◽  
Wei Ou ◽  
Xiaoxuan Liu ◽  
...  
Keyword(s):  
Waterborne Polyurethane ◽  
Solid Content ◽  
High Solid Content ◽  
High Solid

Application of Nano‐Sized RDX in CMDB Propellant with High Solid Content

2021 ◽  
Author(s):  
Haomiao Yu ◽  
Sensen Sun ◽  
Jianbing Gao ◽  
Xiaoxun Jin ◽  
Jie Liu ◽  
...  
Keyword(s):  
Solid Content ◽  
High Solid Content ◽  
High Solid

Preparation of a novel lignin-based film with high solid content and its physicochemical characteristics

2021 ◽  
Vol 164 ◽  
pp. 113396
Author(s):  
Xiaojuan Chen ◽  
Zhonghua Li ◽  
Lidan Zhang ◽  
Haoran Wang ◽  
Congzhi Qiu ◽  
...  
Keyword(s):  
Physicochemical Characteristics ◽  
Solid Content ◽  
High Solid Content ◽  
High Solid
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