Nanostructured Epoxies by the Use of Block Copolymers

Characterization of nanostructured epoxy networks modified with isocyanate-terminated liquid polybutadiene

“…Recently interest in the development of nanostructured epoxy networks has been increased significantly due to the possibility in designing new material structures with desired properties, by controlling the morphology of the dispersed phase in nanoscale [6]. Highly transparent nanostructured epoxy thermosetting blends have been prepared using block copolymers, in which at least one of the block segments is initially miscible with the epoxy resin.…”

Copolymer architecture effects on the morphology and surface performance of epoxy thermosets containing fluorinated block copolymers

“…[11][12][13][14][15][16] Epoxy networks possess excellent integrated properties, making them widely applicable in markets such as construction, industry, aerospace, and so forth. 25 Here, epoxy resin is an ideal candidate for block copolymers because the related blending mechanisms have been well revealed. [26][27][28][29][30][31][32][33][34] Recently, Ocando et al 13 reported on the fluorinated diblock copolymer, poly (e-caprolactone)-b-poly (heptadecafluorodecyl acrylate) (PCL-b-PaF) (M n 5 19,000 g mol 21 and f PCL 5 0.89), which were synthesized via the combination of ring-opening polymerization (ROP) and atom transfer radical polymerization (ATRP).…”

Influence of end groups in hyperbranched polyesters used as modifiers in the characteristics of epoxy thermosets cured by adipic dihydrazide

“…The samples were cured isothermally in a mould at 190°C for 1 h and then post-cured for 0.5 h at 200°C. Before the samples were prepared, they were degassed in a vacuum oven at 50°C for 3 h. Single cantilever bending at 1 Hz was performed at 3°C/min from 30 to 220°C on prismatic rectangular samples (1.5$20$5 mm 3 ). Thermogravimetric analysis was carried out with a Mettler-Toledo TGA/SDTA 851e thermobalance (Greifensee, Switzerland).…”

“…With the aim to increase their toughness different types of modifiers have been added to epoxy formulations such as rubber, thermoplastic and core-shell particles. The addition of liquid rubbers and thermoplastics was one of the first attempts to improve toughness, but usually this method has a detrimental effect on the thermomechanical characteristics of the thermosets and the processability of the formulation [3], which is a drawback for coatings applications [4,5]. To solve the limitations related to processability, hyperbranched polymers (HBPs) were introduced as toughness modifiers [6][7][8].…”