Phase structure and adhesion properties of acrylic block copolymer/tackifier blends as nanocomposite‐like pressure‐sensitive adhesives

2021 ◽  
pp. 51384
Author(s):  
Mariko Sasaki ◽  
Yusuke Kashihara ◽  
Shun Okada ◽  
Kazuma Shibamoto ◽  
Yuka Kubo ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Phase Structure ◽  
Adhesion Properties ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive

Adhesion properties of polyacrylic block copolymer pressure‐sensitive adhesives and analysis by pulse NMR and AFM force curve

2019 ◽  
Vol 136 (29) ◽  
pp. 47791 ◽  
Author(s):  
Shun Okada ◽  
Yusuke Kashihara ◽  
Tomoyasu Hirai ◽  
Syuji Fujii ◽  
Yoshinobu Nakamura ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Force Curve ◽  
Adhesion Properties ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive

scholarly journals Structural and Viscoelastic Properties of Thermoplastic Polyurethanes Containing Mixed Soft Segments with Potential Application as Pressure Sensitive Adhesives

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3097
Author(s):  
Mónica Fuensanta ◽  
José Miguel Martín-Martínez
Keyword(s):  
Phase Separation ◽  
Potential Application ◽  
Viscoelastic Properties ◽  
Gravimetric Analysis ◽  
Scanning Calorimetry ◽  
Adhesion Properties ◽  
Pressure Sensitive Adhesives ◽  
Thermoplastic Polyurethanes ◽  
Pressure Sensitive ◽  
Soft Segments

Thermoplastic polyurethanes (TPUs) were synthetized with blends of poly(propylene glycol) (PPG) and poly(1,4-butylene adipate) (PAd) polyols, diphenylmethane-4,4′-diisocyanate (MDI) and 1,4-butanediol (BD) chain extender; different NCO/OH ratios were used. The structure and viscoelastic properties of the TPUs were assessed by infrared spectroscopy, differential scanning calorimetry, X-ray diffraction, thermal gravimetric analysis and plate-plate rheology, and their pressure sensitive adhesion properties were assessed by probe tack and 180° peel tests. The incompatibility of the PPG and PAd soft segments and the segregation of the hard and soft segments determined the phase separation and the viscoelastic properties of the TPUs. On the other hand, the increase of the NCO/OH ratio improved the miscibility of the PPG and PAd soft segments and decreased the extent of phase separation. The temperatures of the cool crystallization and melting were lower and their enthalpies were higher in the TPU made with NCO/OH ratio of 1.20. The moduli of the TPUs increased by increasing the NCO/OH ratio, and the tack was higher by decreasing the NCO/OH ratio. In general, a good agreement between the predicted and experimental tack and 180° peel strength values was obtained, and the TPUs synthesized with PPG+PAd soft segments had potential application as pressure sensitive adhesives (PSAs).

Contact Time and Temperature Dependencies of Tack in Polyacrylic Block Copolymer Pressure-Sensitive Adhesives Measured by the Probe Tack Test

2012 ◽  
Vol 26 (1-3) ◽  
pp. 231-249 ◽  
Author(s):  
Yoshinobu Nakamura ◽  
Keigo Imamura ◽  
Keiko Ito ◽  
Shinji Nakano ◽  
Akemi Sueoka ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Contact Time ◽  
Pressure Sensitive Adhesives ◽  
Pressure Sensitive
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