Polyurethane Building Blocks

Sonnenschein, Mark F.

doi:10.1002/9781118901274.ch2

Cited by 3 publications

(1 citation statement)

References 87 publications

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“…PUr results from the reaction between hydroxyl (-OH) groups and isocyanate groups (-NCO) while PU is obtained from a reaction of amine (-NH 2 ) and NCO groups. [10][11][12][13][14][15][16] Both PU and PUr possess hard and soft domains. Their elastomers are currently used as protective materials for different applications owing to their chemical resistance and toughness.…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization, and influence of polyurea coatings on their layered composite materials based on flexible rebonded polyurethane

Temizkan¹,

Eroğlu²,

Ergün

et al. 2021

Polymer Engineering & Sci

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Preparation and characterization of a series of polyurea (PU) coatings and their influences on layered composite materials based on rebonded polyurethane (PUr) for floor application are described in terms of the raw materials, formulation, and application performance. While PU coatings show almost the same FTIR peaks, thermogravimetric analyses results reveal that thermal stabilities of the PU coatings are slightly enhanced with the use of trifunctional polyamine compound and one step degradation takes place beyond 300 C. All PU coatings have very dense, smooth, and bubble-free surfaces whereas the cross-sectional SEM images exhibit pores of different sizes. Contact angle values of all PU coatings are bigger than 90 indicating that the surfaces are hydrophobic. Using propylene carbonate in the preparation of methylene diphenyl diisocyanate (MDI) prepolymer and the chain extender in the PU coating formulation impacts the mechanical and electrical properties of the PU coatings as well as layered PU/PUr composite materials. In conclusion, not only the controllable physicochemical and mechanical properties of layered PUr/PU composites but also the usage potential of recycled PU scraps in these layered composites are very promising for better floor applications.

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