Toughening of epoxy thermosets by self-assembled nanostructures of amphiphilic comb-like random copolymers

Jheng, Li-Cheng; Chang, Ting-Yu; Fan, Chin-Ting; Hsieh, Tsung-Han; Hsieh, Feng-Ming; Huang, Wan-Ju

doi:10.1039/d3ra06349f

RSC Adv.

2023

DOI: 10.1039/d3ra06349f

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Toughening of epoxy thermosets by self-assembled nanostructures of amphiphilic comb-like random copolymers

Li-Cheng Jheng,

Ting-Yu Chang,

Chin-Ting Fan

et al.

Abstract: Amphiphilic comb-like random copolymers bearing epoxy-philic PEGMMA and epoxy-phobic alkyl pendants can self-assemble into well-defined nanostructures in anhydride-cured epoxy thermosets.

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2024

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A phosphorus/fluorine‐containing block copolymer endows epoxy with multifunctionality

Chen,

Liu,

et al. 2024

J of Applied Polymer Sci

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In order to achieve flame retardant, hydrophobic, and toughened epoxy resins, phosphorus/fluorine‐containing block copolymer (FBCP) was synthesized by reversible addition‐fragmentation chain transfer polymerization, and then the as‐synthesized PMADOPO‐b‐PHFBA block copolymer was used as additive to modify the epoxy resin, accompanying with a random copolymer (FRCP) serving as control group. It showed that due to the regular arrangement of molecular chains, FBPC formed a fibrous‐like structure at the fracture interface of epoxy/PMADOPO‐b‐PHFBA (EP/FBCP) samples, effectively enhancing the toughness of epoxy composite materials. The fracture energy of EP90/FBCP‐10 was higher than that of EP90/FRCP‐10 and was about twice than that of pure EP. The addition of 3 wt% FBCP could enhance the limited oxygen index (LOI) of EP97/FBCP‐3 to 33.2% and reached a V‐1 UL‐94 rating. As the addition of FBCP increased, the LOI gradually increased. When the addition of FBCP was 10%, the LOI and UL‐94 of EP90/FBCP‐10 was 38.2% and V‐0 grade, respectively. Meanwhile, the presence of fluorine element effectively reduced the surface energy of the composite EP material. Compared with pure EP, the water contact angle of EP90/FBCP‐10 was about 101° with an increasing of 20.8%. Furthermore, the flame‐retardant mechanism of EP/FBCP epoxy composites was discussed.

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A phosphorus/fluorine‐containing block copolymer endows epoxy with multifunctionality

Chen,

Liu,

et al. 2024

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

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Toughening of epoxy thermosets by self-assembled nanostructures of amphiphilic comb-like random copolymers

Abstract: Amphiphilic comb-like random copolymers bearing epoxy-philic PEGMMA and epoxy-phobic alkyl pendants can self-assemble into well-defined nanostructures in anhydride-cured epoxy thermosets.

Cited by 1 publication

References 53 publications

A phosphorus/fluorine‐containing block copolymer endows epoxy with multifunctionality

A phosphorus/fluorine‐containing block copolymer endows epoxy with multifunctionality

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