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- W2893822308 abstract "ABSTRACT The present work describes the role of accurate selection of diisocyanate on the adhesion strength of polyurethanes (PUs). The concentration of diisocyanate induces the hard segment (HS) in the main architecture of PUs which decides the viscoelastic properties of the polymers. A balanced ratio of viscoelastic properties ultimately determines the adhesion strength. The composition of the polymers consists of a blend of macrodiol of hydroxyl‐terminated polybutadiene and polypropylene glycol with different molecular weights. Isophorone diisocyanate (IPDI) is used to develop the urethane linkages by maintaining its contribution from 28 to 67% as HS contents. It determines the adhesion strength of the final product. The adhesion strength is evaluated by texture analyzer and 180° peel test. The probe tack analysis shows maximum adhesion energy of 156.2 J cm −2 and 180° peel test shows 18.80 N/25 mm peel force. The glass‐transition ( T g ) values obtained through differential scanning calorimetry are in good agreement with theoretically calculated Flory–Fox temperature. The proportion of the loss tangent to the storage modulus (tan δ/ E′ ) shows the optimum value of 2.80 MPa −1 . The ideal concentration of IPDI results to achieve better adhesion properties of PU pressure sensitive adhesives. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47124." @default.
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- W2893822308 date "2018-09-27" @default.
- W2893822308 modified "2023-10-16" @default.
- W2893822308 title "Role of isophorone diisocyanate in the optimization of adhesion tendency of polyurethane pressure sensitive adhesives" @default.
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- W2893822308 doi "https://doi.org/10.1002/app.47124" @default.
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