Effect of 3-Aminopropyltriethoxysilane on Solvent Resistance, Thermal Stability, and Mechanical Properties of Two-Component Waterborne Polyurethane

2015 ◽  
Vol 20 (4) ◽  
pp. 285-297 ◽  
Author(s):  
Shujing Yue ◽  
Zhiying Zhang ◽  
Xinjian Fan ◽  
Pei Liu ◽  
Changfa Xiao
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Waterborne Polyurethane ◽  
Solvent Resistance ◽  
Two Component

scholarly journals Adhesive Bonding of Aluminium Alloy A5754 by Epoxy Resins

10.14311/1835 ◽  
2013 ◽  
Vol 53 (4) ◽  
Author(s):  
Ivan Michalec ◽  
Milan Marônek
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Aluminium Alloy ◽  
Epoxy Resins ◽  
Adhesive Bonding ◽  
Thin Sheets ◽  
Two Component ◽  
Promising Area

Joining thin sheets of aluminium and its alloys is a promising area in the field of joining materials. Nowadays, joining methods that do not melt the material itself are increasingly being utilised. This paper deals with adhesive bonding of aluminium alloy A5754 by two-component epoxy resins. Theresults show that joints bonded by Hysol 9466 have appropriate mechanical properties, but that joints bonded by Hysol 9492 have better thermal stability.

Synthesis and characterization of non-ionic and anionic two-component aromatic waterborne polyurethane

2018 ◽  
Vol 47 (4) ◽  
pp. 290-299 ◽  
Author(s):  
Sainan Zhang ◽  
Xiankai Jiang
Keyword(s):  
Thermal Stability ◽  
Water Resistance ◽  
Soft Segment ◽  
Aqueous Dispersion ◽  
Waterborne Polyurethane ◽  
Content Type ◽  
Hydrophilic Modification ◽  
Two Component ◽  
Better Than

Purpose The purpose of this paper is to synthesize and characterize a series of two-component aromatic waterborne polyurethane (2K-WPU) which is composed of non-ionic and anionic polyisocyanate aqueous dispersion and polyurethane polyol aqueous dispersion. Design/methodology/approach The polyisocyanate aqueous dispersion was synthesized through non-ionic and anionic hydrophilic modification procedures. The values of the hydrogen bonding index (HBI) and molecule structures of WPU were obtained by Fourier transform infrared (FTIR). The thermal, mechanical and water resistance properties of 2K-WPU films were investigated. Findings The appearance of non-ionic polyisocyanate aqueous dispersion and anionic polyisocyanate aqueous dispersion was colorless translucent pan blue and yellow opaque emulsions, respectively. FTIR not only showed that 2K-WPU was obtained from the polymerization of polyisocyanate component and polyhydroxy component by polymerization but also showed that the content of hydrogen bondings of anionic 2K-WPU (WPU 2) was higher than non-ionic 2K-WPU (WPU 1). The glass-transition temperature (Tg), storage modulus and water resistance of WPU 2 were higher than WPU1, whereas the thermal stability of WPU1 was better than WPU 2. Practical implications The investigation established a method to prepare a series of 2K-WPU which was composed of non-ionic or anionic polyisocyanate aqueous dispersion and polyurethane polyol aqueous dispersion. The prepared 2K-WPU film could be applied as substrate resin material in the field of waterborne coating. Originality/value The paper established a method to synthesize a series of 2K-WPU. The effect of HBI value and the molecule structure of soft segment on the thermal stability, mechanical and water resistance properties of 2K-WPU films were studied.

Synthesis and characterization of alicyclic two-component waterborne polyurethane

2018 ◽  
Vol 47 (4) ◽  
pp. 315-322 ◽  
Author(s):  
Jizhi Zhang ◽  
Xiankai Jiang
Keyword(s):  
Thermal Stability ◽  
Water Resistance ◽  
Aqueous Dispersion ◽  
Waterborne Polyurethane ◽  
Molar Ratio ◽  
Mechanical And Thermal Properties ◽  
Content Type ◽  
Two Component ◽  
Practical Implications

Purpose The purpose of this paper is to synthesize and characterize a series of alicyclic two-component waterborne polyurethane (2K-WPU) which is composed of non-ionic polyisocyanate aqueous dispersion and hydroxyl aqueous dispersion. Design/methodology/approach The appearances of aqueous dispersions and 2K-WPU films were observed by photographs. The micromorphology of alicyclic polyisocyanate aqueous dispersion was examined by scanning electron microscopy (SEM). The molecule structures of WPU were studied by Fourier transform infrared (FTIR). The effect of NCO:OH molar ratio of two components and trimethylolpropane (TMP) content on the thermal stability, mechanical and water resistance properties of 2K-WPU films was studied. Findings It was found by SEM that alicyclic polyisocyanate particles in aqueous dispersion showed a kind of spherical particle appearance, in which hydrophobic polyisocyanate was encapsulated by hydrophilic ether linkages segment. FTIR showed that WPU was polymerized through mixture of polyisocyanate component and hydroxyl component and increasing NCO:OH molar ratio of two components from 1.1:1 to 1.5:1 had increased the content of urea, urethane and allophanate of 2K-WPU films. Increasing NCO:OH molar ratio had improved the mechanical and thermal properties of the 2K-WPU film, but the water resistance of the 2K-WPU film increased first and then weakened. Increasing TMP contents from 1 to 0.75 mol for 1:5 system had improved the mechanical, thermal and water resistance properties of the 2K-WPU film. Practical implications The investigation established a method to prepare alicyclic 2K-WPU which is composed of non-ionic polyisocyanate aqueous dispersion and hydroxyl aqueous dispersion. The prepared 2K-WPU film could be applied in the field of waterborne surface coating, e.g. textile, wood and synthetic leather surfaces (Hasan et al., 2017; Akindoyo et al., 2016). Originality/value The paper established a method to synthesize alicyclic two-component 2K-WPU. The effect of NCO:OH molar ratio and TMP content on the thermal stability, mechanical and water resistance properties of 2K-WPU films were studied.

Thermal Stability, Mechanical Properties and Solvent Resistance of PP/clay Nanocomposites Prepared by Melt Blending

2007 ◽  
Vol 7 (17) ◽  
pp. 2480-2484 ◽  
Author(s):  
Shahryar Jafari Nejad ◽  
Seyed Javad Ahmadi . ◽  
Hossein Abolghasemi . ◽  
Ahmad Mohaddespour .
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Clay Nanocomposites ◽  
Melt Blending ◽  
Solvent Resistance

Synergistic effect of phosphorus–nitrogen and silicon-containing chain extenders on the mechanical properties, flame retardancy and thermal degradation behavior of waterborne polyurethane

RSC Advances ◽  
2016 ◽  
Vol 6 (76) ◽  
pp. 72409-72422 ◽  
Author(s):  
Peikun Zhang ◽  
Haojun Fan ◽  
Saiqi Tian ◽  
Yi Chen ◽  
Jun Yan
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Thermal Degradation ◽  
Synergistic Effect ◽  
Flame Retardancy ◽  
Waterborne Polyurethane ◽  
Degradation Behavior ◽  
Thermal Degradation Behavior ◽  
Chain Extenders

A phosphorus–nitrogen–silicon containing waterborne polyurethane (FRWPU) was synthesized in order to improve flame retardancy without sacrificing thermal stability and mechanical properties.

Study on Properties of Modified Porous Starch/ Natural Rubber Composite

2014 ◽  
Vol 941-944 ◽  
pp. 294-300 ◽  
Author(s):  
Xue Mei Pan ◽  
Min Wu ◽  
Si Dong Li ◽  
Lin Fang ◽  
Zhi Feng Wang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Natural Rubber ◽  
Water Resistance ◽  
Natural Rubber Latex ◽  
Swelling Behavior ◽  
Modified Starch ◽  
Rubber Latex ◽  
Solvent Resistance ◽  
Rubber Composite

The porous starch was modified by xanthates, and the starch/natural rubber composite was prepared by blending the modified starch with natural rubber latex. The morphology, thermal stability, swelling behavior and mechanical properties of the composite were investigated. Morphology studies by SEM showed that the modified porous starch were homogeneously dispersed in NR matrix. The composite has higher solvent resistance and lower water resistance after adding modified porous starch. The mechanical properties of composite are improved significanly with the increase of modified porous starch.

Synthesis and Properties of Waterborne Polyurethane-Acrylate Hybrid Emulsion Modified by Organic Silicane

2011 ◽  
Vol 287-290 ◽  
pp. 1532-1537 ◽  
Author(s):  
Xiao Juan Lai ◽  
Yi Ding Shen ◽  
Lei Wang
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Tensile Strength ◽  
Mass Fraction ◽  
Waterborne Polyurethane ◽  
Ethyl Acrylate ◽  
Isophorone Diisocyanate ◽  
Elongation At Break ◽  
Polyurethane Acrylate ◽  
Waterborne Polyurethane Acrylate

Waterborne polyurethane emulsions were synthesized with isophorone diisocyanate(IPDI), dihydromethyl propionic acid(DMPA) and poly-ε-caprolactone glycol(PCL), and then reacted with hydroxy-ethyl acrylate(HEA) and 3-aminopropyltriethoxylsilane(APTES) to cap the terminal -NCO groups. The polyurethane emulsions were used to copolymerize with acrylates to synthesize the modified waterborne polyurethane-acrylate hybrid emulsions. The structure, thermal stability and crystallinity of modified polyurethane were studied by FTIR, TG, XRD and the mechanical properties of modified polyurethane films was also investigated. The results show that crystallization of the modified waterborne polyurethane decreases and thermal stability is improved. When the mass fraction of acrylate is 20% and APTES content is 15%, tensile strength of the modified polyurethane films can reach 23.9MPa and elongation at break is 247%.

The Effect of Content of Castor Oil on Two-Component Castor Oil Based Polyurethane Adhesive

2011 ◽  
Vol 311-313 ◽  
pp. 1128-1131
Author(s):  
Yan Qin ◽  
Jin Rong Jia ◽  
Zhi Xiong Huang
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Castor Oil ◽  
High Performance ◽  
Curing Agent ◽  
Polyurethane Adhesive ◽  
Adhesion Properties ◽  
Two Component ◽  
Thermal Stability Of

A new two-component polyurethane adhesive was prepared with castor oil used as main agent and castor oil modified TDI used as curing agent.The effect of castor oil on the mechanical properties, adhesion properties and thermal stability of this adhesive were studied.This paper show us that TDI could be used as curing agent after modification. When the NCO/OH in curing agent and main agent:curing agent were 1.6 and 3:5 respectively, high performance adhesive was obtained.

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