Segmented Block Copolymers with Monodisperse Hard Segments: The Influence of H‐Bonding on Various Properties

Biemond, G.J.E.; Feijén, Jan; Gaymans, R.J.

doi:10.1002/mame.200900093

Cited by 15 publications

(19 citation statements)

References 15 publications

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“…17,34 The representative tensile stress−strain curves of PA36,36s are shown in Figure 3a, which have a similar shape to that of thermoplastic elastomers including polyamide-based thermoplastic elastomers. 35,36 All PA36,36s display remarkable stretchability (Figure 3a,b). PA36,36(8 h) can be stretched to 2286 ± 135% under a strain rate of 100 mm min −1 , which is 22.9 times its original length (Table 1).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Wholly Biobased, Highly Stretchable, Hydrophobic, and Self-healing Thermoplastic Elastomer

Nurhamiyah

Amir

Finnegan

et al. 2021

ACS Appl. Mater. Interfaces

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Renewable polymers with excellent stretchability and self-healing ability are interesting for a wide range of applications. A novel type of wholly biobased, self-healing, polyamide-based thermoplastic elastomer was synthesized using a fatty dimer acid and a fatty dimer amine, both containing multiple alkyl chains, through facile one-pot condensation polymerization under different polymerization times. The resulting elastomer shows superior stretchabiblity (up to 2286%), high toughness, and excellent shape recovery after being stretched to different strains. This elastomer also displays high room temperature autonomous self-healing efficiency after fracture and zero water uptake during water immersion. The highly entangled main chain, the multiple dangling chains, the abundant reversible physical bonds, the inter-molecular diffusion and the low ratio of amide to methylene 2 group within the elastomer are responsible for these extraordinary properties. The polymerization time influences the properties of the elastomer. The use of the optimal self-healing thermoplastic elastomer in anti-corrosion coating, piezoresistive sensing and highly stretchable fibres is also demonstrated. The elastomer coating prevents stainless-steel products from corrosion in a salty environment due to its superhydrophobicity. The elastomer serves as a robust flexible substrate for creating self-healing piezoresistive sensors with excellent repeatability and self-healing efficiency.The elastomer fibre yarn can be stretched to 950% of its original length confirming its outstanding stretchability.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Wholly Biobased, Highly Stretchable, Hydrophobic, and Self-healing Thermoplastic Elastomer

Nurhamiyah

Amir

Finnegan

et al. 2021

ACS Appl. Mater. Interfaces

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“…It seems promising to mimic this motif and prepare multiblock copolymers that comprise hydrogen bonding segments [13]. It has already been shown by us and others that these polymers have distinct mechanical properties compared to the corresponding polymers without hydrogen bonding segments [14,15].…”

Section: Introductionmentioning

confidence: 99%

Multiblock Copolymers of Styrene and Butyl Acrylate via Polytrithiocarbonate-Mediated RAFT Polymerization

Ebeling

Vana

2011

Polymers

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Abstract:When linear polytrithiocarbonates as Reversible Addition-Fragmentation chain Transfer (RAFT) agents are employed in a radical polymerization, the resulting macromolecules consist of several homogeneous polymer blocks, interconnected by the functional groups of the respective RAFT agent. Via a second polymerization with another monomer, multiblock copolymers-polymers with alternating segments of both monomers-can be prepared. This strategy was examined mechanistically in detail based on subsequent RAFT polymerizations of styrene and butyl acrylate. Size-exclusion chromatography (SEC) of these polymers showed that the examined method yields low-disperse products. In some cases, resolved peaks for molecules with different numbers of blocks (polymer chains separated by the trithiocarbonate groups) could be observed. Cleavage of the polymers at the trithiocarbonate groups and SEC analysis of the products showed that the blocks in the middle of the polymers are longer than those at the ends and that the number of blocks corresponds to the number of functional groups in the initial RAFT agent. Furthermore, the produced multiblock copolymers were analyzed via differential scanning calorimetry (DSC). This work underlines that the examined methodology is very well suited for the synthesis of well-defined multiblock copolymers.

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“…The most typical investigation on MBCs consists of increasing the fraction of crystallizable HSs in a polymer and measuring its growing melting point ( T m ) 22 and/or elastic modulus ( E ) 82 and/or stress at failure 83

((), σ_{\max})

. While these results are qualitatively expected from the larger size of crystallites and content in hard phase, little is known on the impact of non‐chemistry oriented variables such as the network topology, on both T m and

E

.…”

Section: Introductionmentioning

confidence: 99%

Recent advances on the structure–properties relationship of multiblock copolymers

Baeza

2021

Journal of Polymer Science

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Multiblock copolymers represent a fascinating class of materials that sits at the very heart of industrial applications and fundamental polymer science. They are most often made of a linear succession of incompatible “soft” and “hard” segments that microphase separate at room temperature while they can be easily re‐homogenized upon heating. This thermoreversible character provides them with decisive advantages with respect to other rubber‐based materials such as vulcanized elastomers, making them indispensable for the development of a more sustainable polymer industry. Beyond practical opportunities, tailoring the multiblock copolymers morphology has a pivotal role to play in the fundamental understanding of the structure–properties relationship of polymer‐based systems. It notably serves to comprehend complex materials such as semicrystalline homopolymers and nanocomposites. Aside from the thorough work developed on well‐defined diblock copolymers for half a century, this article review aims to guide the reader into the more intricate world of multiblock copolymers by providing him/her quantitative tools to connect chemical nature, microstructure and mechanical properties.

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Segmented Block Copolymers with Monodisperse Hard Segments: The Influence of H‐Bonding on Various Properties

Cited by 15 publications

References 15 publications

Wholly Biobased, Highly Stretchable, Hydrophobic, and Self-healing Thermoplastic Elastomer

Wholly Biobased, Highly Stretchable, Hydrophobic, and Self-healing Thermoplastic Elastomer

Multiblock Copolymers of Styrene and Butyl Acrylate via Polytrithiocarbonate-Mediated RAFT Polymerization

Recent advances on the structure–properties relationship of multiblock copolymers

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