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    POSS-pendanted in epoxy chain inorganic-organic hybrid for highly thermo-mechanical, permeable and hydrothermal-resistant coatings

    Year: 2017

    Journal: Mater. Chem. Phys., Volume 201, NOV 1, page 120–129

    Authors: Ma, Yanli; He, Ling

    Organizations: National Natural Science Foundation of China (NSFC) [51573145, 51373133]; National Basic Research Program of China (973 Program) [2012CB720904]

    Keywords: POSS-pendanted epoxy hybrid; Coatings; Thermo-mechanical property; Hydrothermal-resistance; Permeability

    Organic-inorganic hybrid is prepared by grafting nano-scaled methacrylisobutyl polyhedral oligomeric silsesquioxane (MA-POSS) onto glycidyl methacrylate (GMA) via the combining of free radical polymerization, epoxy opening reaction and atom transfer radical polymerization (ATRP) techniques. The obtained (MA-POSS)-pendanted epoxy hybrid, PGMA-g-P(MA-POSS), are discussed fat their highly thermo-mechnical property, hydrothermal resistance and permeability based on the self-assembled micelles. In THE solution, PGMA-g-P(MA-POSS) could self-assembly into 110-800 nm sphereric core shell micelles, while, the pre-curing PGMA-g-P(MA-POSS) distributes 60-600 nm core-shell micelles because the developed three-dimensional network structure makes the PGMA chains twining and cross linking tightly leading to the shrinkage of particles. These self-assembled micelles have provided the casted films with 0.19-14.4 nm surface roughness, significant water resistance (SCA = 113-123 degrees), high thermal stability (T-d = 300-600 C degrees) and strong adhesive strength (216-333 N). Compared with the poor adhesive strength for commercial epoxy resin (E-51) decreased from 393 N to 28 N after 15 hydrothermal cycles, the obtained PGMA-g-P(MA-POSS) displays super thermal endurance properties and humidity resistance by keeping a relative constant adhesive strength (from 340 N to 337 N). Furthermore, PGMA-g-P(MA-POSS) also gives much better permeability to the protective treated sandstone than E-51. Therefore, PGMA-g-P(MA-POSS) is prospected to serve as coatings with great potential applications. (C) 2017 Elsevier B.V. All rights reserved.
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