A5102837733- Epoxy Resin Curing Processes
- Polymer Nanocomposites and Properties
- Injection Molding Process and Properties
- Advanced Polymer Synthesis and Characterization
- Polymer crystallization and properties
- Mechanical Behavior of Composites
- Machine Learning in Materials Science
- Material Properties and Applications
- Photopolymerization techniques and applications
- Innovations in Concrete and Construction Materials
- Innovative Microfluidic and Catalytic Techniques Innovation
- Block Copolymer Self-Assembly
- Fiber-reinforced polymer composites
3M (United States)
2019-2022
University of Minnesota, Duluth
2009-2013
University of Minnesota
2008-2009
Dow Chemical (United States)
2008-2009
Texas A&M University
2008-2009
An amphiphilic poly(ethylene-alt-propylene)-b-poly(ethylene oxide) (PEP-PEO) block copolymer (BCP) was blended with a bisphenol A-based epoxy resin formulation and self-assembled into wormlike micelle structure. With an incorporation of 5 wt % the BCP material, fracture toughness improved by >100% over neat epoxy. The morphology mechanical properties this BCP-modified were investigated using transmission electron microscopy, dynamic analysis, tensile tests, measurements. Toughening...
An amphiphilic block copolymer toughener was incorporated into a liquid epoxy resin formulation and self-assembled well-dispersed nanometer scale spherical micelles with size of about 15 nm. The nanosized at 5 wt % loading can significantly improve the fracture toughness cured thermosets without reduction in modulus room temperature only slight drop glass transition temperature. toughening mechanisms were investigated, it found that nm could cavitate to induce matrix shear banding, which...
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication the EditorNEXTBlock Copolymer Toughened Epoxy: Role of Cross-Link DensityZachary J. Thompson†, Marc A. Hillmyer‡, Jia (Daniel) Liu§, Hung-Jue Sue§, Marv Dettloff∥, and Frank S. Bates*†View Author Information Department Chemical Engineering Materials Science Chemistry, University Minnesota, Minneapolis, Minnesota 55455; Polymer Technology Center, Mechanical Engineering, Texas A&M University, College Station, 77843; Epoxy...
This self-driving laboratory combines a robot for preparing and testing adhesive bonds with an optimizer to rapidly improve formulations.
The effect of poly(ethylene-alt-propylene)-b-poly(ethylene oxide) block copolymer modifiers on the adhesion strength epoxies was evaluated. Three varying weight fractions were synthesized and mixed into epoxy precursors cured, forming well-dispersed nanoscale structures in matrix. symmetric copolymers formed spherical micelles, asymmetric with shorter poly(ethylene blocks small bilayer vesicles For both nanostructure morphologies, compact tension tests bulk specimens showed that modified...
The effects of nanoscale silica particle additives on the tensile properties neat and poly(ethylene-alt-propylene)-b-poly(ethylene oxide) block copolymer (BCP)-modified epoxies were evaluated. Nanosilica BCP modifiers dispersed both individually together in epoxy formulations. nanosilica formed a stable dispersion, well-dispersed spherical micelle nanostructures matrix. When used, micelles observed to adsorb surfaces, resulting limited aggregation particles. Tensile tests bulk specimens...
The effect of the size and surface functionalization silica particle additives on bulk adhesive mechanical properties neat poly(ethylene oxide)-b-poly(ethylene-alt-propylene) block copolymer (BCP)-modified epoxies was evaluated. Three types particles were investigated: microscale (diameter = 500 nm–4 μm) with without phenylsilane nanoscale 140 nm) functionalization. Silica dispersed individually or together copolymers in epoxy monomers cured. Tensile tests revealed that incorporation...