Epoxy resin containing poly(ethylene oxide)-block-poly(ɛ-caprolactone) diblock copolymer: Effect of curing agents on nanostructures

Multifunctional Thermally Reversible Nanostructured Thermosetting Materials Based on Block Copolymers Dispersed Liquid Crystal

“…In this case, it should be pointed out that the nanometer-scale spherical particles formed in the fully cured epoxy network can be attributed to the PS-rich phase since the PEO block is miscible with the epoxy network as a result of their similar solubility parameters and intermolecular hydrogen-bonding interactions formed between the hydroxy groups of the amine-cured epoxy and the ether oxygen atom of PEO, which has been demonstrated by DSC and published elsewhere. [7,12,[34][35][36] Consequently, in the phase AFM image, the light continuous regions are ascribed to the epoxy cured resin, which are miscible with the PEO block, whereas the dark areas correspond to PS-rich microdomains. The spherical PS-rich domains do not show a narrow size diameter since not all of the PS-rich particles can be distinguished in shape by AFM.…”

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

“…These block copolymers can assume some self-assembly ordered structures on the nanometric scale when mixed with the epoxy resin, and they can be further fixed during the curing process [7,8]. In other systems, the epoxy prepolymer and the block copolymer can provide a homogeneous solution before curing, but during the curing process the nanostructure can form through a mechanism called reaction-induced microphase separation [9]. Some examples of the copolymers that give rise to nanoscopic structures include diblocks and/or triblocks of poly(ethylene oxide) with polycaprolactone (PEO-b-PCL) [9], poly(propylene oxide) (PEO-b-PPO) [10][11][12][13][14][15], poly(hexylene oxide) (PEO-b-PHO) [16], poly(n-butylene oxide) (PBO-b-PEO) [17], poly(ethyl ethylene) (PEO-b-PEE) [7,8], poly(ethylene-alt-propylene) (PEO-b-PEP) [7,8,[18][19][20][21], low molar mass polyethylene (PEO-b-PE) [22], polystyrene (PEO-b-PS) [23], and polydimethylsiloxane (PEO-b-PDMS) [24]; block copolymers of polycaprolactone with polydimethyl-siloxane (PCL-b-PDMS-b-PCL) [25,26], poly(n-butyl acrylate) (PCL-b-PBA) [27], polybutadiene(PCLb-PBD-b-PCL) [28], polystyrene (PCL-b-PS) [29], or poly(butadiene-co-acrylonitrile) (PCL-b-PBN-b-PCL) [30]; block copolymers of poly(methyl methacrylate) with polystyrene (PMMA-b-PS) [31,32], and ABC-type triblock copolymer composed of polystyrene-b-polybutadiene-b-poly(methyl methacrylate) (PS-b-PBD-b-PMMA) [33,34], and polydimethyl-siloxane-b-polycaprolactone-b-polystyrene (PDMS-b-PCL-b-PS) [35].…”

Biocompatible and biodegradable MOPEO‐b‐PCL diblock copolymer micelles as nanocontainers for drugs

“…They corresponded to the protons of a central methylene group (c) in PCL unit, two methylene groups near the central one (d), a methylene group near carbonyl (e) and a methylene group, disposed near oxygen atom of ester group (f), consequently. The interpretation of spectra was realized in accordance with the data of the atlas [13] and other studies [14]. Additionally, the number average molecular weights of MOPEG, PCL and DBCs were calculated, using equation (2):…”

“…[14], where w is the mass fraction of corresponding block in DBC; the value of DH 0 m = 137.5 J N g -1 for 100% crystalline PCL was taken of the study [12]. [a] Glasübergangstemperatur.…”