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.

TDI-IPDI Waterborne Polyurethane Emulsions: Properties and Application

2011 ◽  
Vol 233-235 ◽  
pp. 1700-1703
Author(s):  
Yu Hua Guo ◽  
Shu Cai Li ◽  
Gao Sheng Wang
Keyword(s):  
Water Resistance ◽  
Waterborne Polyurethane ◽  
Molar Ratio ◽  
Resistance Surface ◽  
Surface Sizing ◽  
Folding Endurance ◽  
End Capping ◽  
Sizing Agents ◽  
Tearing Resistance ◽  
Surface Gloss

TDI as main isocyanate, IPDI as end-capping reagent, waterborne polyurethane emulsions (WPUs) surface-sizing agent have been obtained. The properties of WPUs and papers sized by WPUs with different DMPA content, different NCO/OH molar ratio and nNCOTDI/nNCOIPDI are systematically examined. The results show that WPUs are new kinds of surface sizing agents with good properties. The water resistance, surface gloss and smoothness of papers sized by WPUs have dramatically increased. The folding endurance, tearing resistance and tensile strength of WPU sized papers are observed to increase obviously.

scholarly journals Synthesis of highly branched water-soluble polyester and its surface sizing agent strengthening mechanism

e-Polymers ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 027-037
Author(s):  
Wangwang Duan ◽  
Xiaorui Li ◽  
Yiding Shen ◽  
Kai Yang ◽  
Hua Zhang
Keyword(s):  
Mechanical Properties ◽  
Water Resistance ◽  
Cellulose Fiber ◽  
Gel Permeation Chromatography ◽  
Strengthening Mechanism ◽  
Water Soluble ◽  
Molar Ratio ◽  
Hydroxyl Groups ◽  
Surface Sizing ◽  
Sizing Agents

Abstract Solvent-free and highly branched water-soluble polyester (WPET) is prepared through self-emulsification methodology, using dimethyl terephthalate (DMT), sodium dimethyl isophthalate-5-sulfonate (SIPM), trimethylolpropane (TMP), and ethylene glycol (EG) by the transesterification and polycondensation. The WPET were first utilized as surface-sizing agents for cellulose fiber paper. The structure, average molecular weights, and physical properties of the water-soluble polyester were characterized by FTIR, 1H NMR, gel permeation chromatography (GPC), dynamic light scattering (DLS), X-ray diffraction (XRD), and dynamic rheometer. The effects of polymer structure and properties, as well as the surface sizing of the paper, were investigated. WPET displayed better surface sizing properties when it was prepared under the following conditions: –COO/–OH molar ratio of 1:2, the SIPM content of 17.98%, and TMP content of 11.10%. The relationships between the WPET structure and sized paper were clearly illustrated. The mechanical properties and water resistance of sized paper did not only depend on multi-branched hydroxyl groups of the WPET chains but also relied on the interactions among polymers and fibers, as well as the high toughness of surface sizing agent. The sizing paper possesses excellent mechanical properties as well as water resistance.

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.

scholarly journals Enhanced mechanical properties, water resistance, thermal stability, and biodegradation of the starch-sisal fibre composites with various fillers

2021 ◽  
Vol 198 ◽  
pp. 109373
Author(s):  
Maocheng Ji ◽  
Fangyi Li ◽  
Jianyong Li ◽  
Jianfeng Li ◽  
Chuanwei Zhang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Water Resistance ◽  
Sisal Fibre ◽  
Fibre Composites

Waterborne polyurethane nanocomposite reinforced with amine intercalated α-zirconium phosphate - Study of thermal and mechanical properties

Polymer ◽  
2020 ◽  
Vol 186 ◽  
pp. 122008 ◽  
Author(s):  
Manoj B. Kale ◽  
Nidhin Divakaran ◽  
Suhail Mubarak ◽  
Duraisami Dhamodharan ◽  
T. Senthil ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Zirconium Phosphate ◽  
Waterborne Polyurethane ◽  
Thermal And Mechanical Properties
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