Mechanical properties of castor oil polymer mortars

Reis, J.M.L.; Motta, E.P.

doi:10.1590/1516-1439.241713

Cited by 2 publications

(1 citation statement)

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“…The maximum temperature was 80 • C because allophanate and biuret cross-links occur secondarily at high temperatures and are important in the polyurethane post-cure, increasing hardness, tensile strength and elastic modulus. The biuret cross-links are even more important because they occur at 80 • C range with the remaining isocyanate groups [20,21].…”

Section: Development Of Artificial Stone Platesmentioning

confidence: 99%

Development of Sustainable Artificial Stone Using Granite Waste and Biodegradable Polyurethane from Castor Oil

Gomes¹,

Carvalho²,

Barreto³

et al. 2022

Sustainability

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Brazil is one of the world’s major ornamental stone producers. As a consequence, ornamental stone wastes are generated on a large scale and are usually open air disposed. Thus, it is important to develop novel material reusing these accumulated wastes, aiming to minimize environmental impact. The development of artificial stones made with ornamental stone wastes agglomerated by a synthetic polymer represents an excellent alternative and, therefore, is currently the subject of several works. This work seeks to develop an innovative artificial stone containing 85%wt of granite waste and 15%wt of vegetable polyurethane from castor oil, a biodegradable resin, from a renewable source. The purpose is creating a sustainable material, technically viable to be applied as a civil construction coating. To manufacture the artificial stone plates, granite and polyurethane were mixed and transferred to a metallic mold subjected to vibration, vacuum and, later, hot compression. The artificial stone presented low water absorption (0.13%) and apparent porosity (0.31%) as well as a favorable 17.31 MPa bend strength. These results were confirmed through the excellent particles/matrix adhesion displayed in the micrographs, in addition to great chemical resistance.

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Section: Development Of Artificial Stone Platesmentioning

confidence: 99%