New Waterborne Polyurethane-Urea Synthesized with Ether-Carbonate Copolymer and Amino-Alcohol Chain Extenders with Tailored Pressure-Sensitive Adhesion Properties

Autor: José Miguel Martín-Martínez, Abbas Khoshnood, Mónica Fuensanta, Francisco Rodríguez-Llansola
Přispěvatelé: Universidad de Alicante. Departamento de Química Inorgánica, Adhesión y Adhesivos
Rok vydání: 2019
Předmět:
Copolymer of ether and carbonate polyol
Thermogravimetric analysis
copolymer of ether and carbonate polyol
Materials science
Tack
02 engineering and technology
010402 general chemistry
01 natural sciences
lcsh:Technology
Article
chemistry.chemical_compound
Differential scanning calorimetry
tack
Polyethylene terephthalate
Copolymer
Viscoelastic properties
General Materials Science
lcsh:Microscopy
Prepolymer
Polyurethane
lcsh:QC120-168.85
Química Inorgánica
lcsh:QH201-278.5
lcsh:T
viscoelastic properties
Pressure-sensitive adhesives
021001 nanoscience & nanotechnology
0104 chemical sciences
adhesion
chemistry
Chemical engineering
lcsh:TA1-2040
pressure-sensitive adhesives
Adhesion
lcsh:Descriptive and experimental mechanics
lcsh:Electrical engineering. Electronics. Nuclear engineering
Amino-alcohol chain extender
Isophorone diisocyanate
amino-alcohol chain extender
0210 nano-technology
Glass transition
lcsh:Engineering (General). Civil engineering (General)
lcsh:TK1-9971
waterborne polyurethane-urea dispersion
Waterborne polyurethane-urea dispersion
Zdroj: Materials
Materials, Vol 13, Iss 3, p 627 (2020)
Volume 13
Issue 3
RUA. Repositorio Institucional de la Universidad de Alicante
Universidad de Alicante (UA)
ISSN: 1996-1944
Popis: New waterborne polyurethane-urea dispersions with adequate adhesion and cohesion properties have been synthesized by reacting isophorone diisocyanate, copolymer of ether and carbonate diol polyol and three amino-alcohols with different number of OH groups chain extenders using the prepolymer method. The waterborne polyurethane-urea dispersions were characterized by pH, particle-size distribution, and viscosity, and the polyurethane-urea films were characterized by attenuated total reflectance infrared (ATR-IR) spectroscopy, differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), and plate-plate rheology (temperature and frequency sweeps). Polyurethane-urea pressure-sensitive adhesives (PUU PSAs) were prepared by placing the waterborne polyurethane dispersions on polyethylene terephthalate (PET) films and they were characterized at 25 °
C by creep test, tack and 180°
peel test. The waterborne polyurethane-urea dispersions showed mean particle sizes between 51 and 78 nm and viscosities in the range of 58&ndash
133 mPa·
s. The polyurethane-urea films showed glass transition temperatures (Tgs) lower than &minus
64 °
C, and they showed a cross of the storage and loss moduli between &minus
8 and 68 °
C depending on the number of OH groups in the amino-alcohol chain extender. Different types of PUU PSAs (removable, high shear) were obtained by changing the number of OH groups in the amino-alcohol chain extender. The tack at 25 °
C of the PUU PSAs varied between 488 and 1807 kPa and the 180°
peel strength values ranged between 0.4 and 6.4 N/cm, and their holding times were between 2 min and 5 days. The new PUU PSAs made with amino-alcohol chain extender seemed very promising for designing environmentally friendly waterborne PSAs with high tack and improved cohesion and adhesion property.
Databáze: OpenAIRE
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