Micro phase separated epoxy/poly(ε-caprolactone)-block-poly(dimethyl siloxane)-block-poly(ε-caprolactone)/4,4′-diaminodiphenylsulfone systems: Morphology, viscoelasticity, thermo-mechanical properties and surface hydrophobicity
Autor: | Jürgen Pionteck, Nisa V. Salim, Anthony Magueresse, Suchart Siengchin, Seno Jose, Nishar Hameed, Sisanth Krishnan Sidhardhan, Yves Grohens, Jyotishkumar Parameswaranpillai |
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Rok vydání: | 2016 |
Předmět: |
Materials science
Polymers and Plastics Organic Chemistry Izod impact strength test 02 engineering and technology Epoxy Dynamic mechanical analysis 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry visual_art Copolymer visual_art.visual_art_medium Thermal stability Composite material 0210 nano-technology Glass transition Caprolactone Curing (chemistry) |
Zdroj: | Polymer Testing. 55:115-122 |
ISSN: | 0142-9418 |
DOI: | 10.1016/j.polymertesting.2016.08.016 |
Popis: | Epoxy resin/4,4′-diaminodiphenylsulfone (DDS) system was modified by the incorporation of poly(e-caprolactone)-block-poly(dimethyl siloxane)-block-poly(e-caprolactone) (PCL–PDMS–PCL) triblock copolymer (TBCP). Morphology, viscoelasticity, thermo-mechanical and surface properties of these blends were investigated. All the blends were opaque after curing. PCL blocks of the TBCP were miscible with epoxy resin while the PDMS fraction was immiscible. However in the cured state, both PCL and PDMS blocks were phase separated from epoxy/DDS matrix. The blends exhibited matrix-droplet morphology in which TBCP phase dispersed as spherical domains in epoxy matrix. Addition of TBCP had profound impact on the cure reaction kinetics. Storage modulus and glass transition temperature (Tg) decreased while impact strength significantly increased. Incorporation of 15 phr of TBCP resulted in 80% improvement in impact strength. Further, thermal stability was unaffected while surface hydrophobicity of the blends increased. |
Databáze: | OpenAIRE |
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