Polystyrene-block-poly(n-butyl acrylate)-block-polystyrene Triblock Copolymer Thermoplastic Elastomer Synthesized via RAFT Emulsion Polymerization

Luo, Yingwu; Wang, Xiaoguang; Zhu, Ye; Li, Bo‐Geng; Zhu, Shiping

doi:10.1021/ma101348k

Cited by 121 publications

(144 citation statements)

References 68 publications

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“…Luo et al also adopted PAA-b-PSt-TTC as a macro-RAFT agent and surfactant in a sequential aqueous emulsion route to PSt-b-P n BuA-b-PSt (SBAS). 107 The controlled synthesis of PSt resulted in lower Đ (1.2-1.5) than in the RAFT studies discussed above, suggesting that colloidal instability and nucleation issues were minimised by using an amphiphilic macro-RAFT agent.…”

Section: An Industrially-attractive Continuous Miniemulsion Was Emplomentioning

confidence: 87%

“…107 Whilst morphology within the symmetrical copolymer particles was non-descript, upon casting films from THF reasonably well-defined lamellar morphology was evident, suggesting that a confinement effect drove the non-descript structure within particles. Dynamic mechanical analysis was employed to elucidate properties of the triblock copolymers relevant to TPEs.…”

Section: Figure 8: Afm Images Of Films Prepared From Block (A C) Andmentioning

confidence: 99%

“…Indeed, the onset of phase separation has been implicated with hindering chain transfer processes and leading to reduced control over polymerisation in solvophobic CLRP. 107,111 Presumably, the mechanism involves growth of the second block until a critical condition is reached at which the two polymers become incompatible (i.e.…”

Section: E Properties Of Block Copolymers From Solvophobic Synthesismentioning

confidence: 99%

“…Arguably the most promising modification of ab initio CLRP is the use of a macroCTA or macroinitiator that also functions as a surfactant, which typically enables simultaneous control over the polymerisation and colloidal stability, and as such the strategy is now commonplace. 133,107,108,109,111,114,112,117 In RAFT, using an amphiphilic macro-RAFT agent immediately localises the CTA at the polymerisation loci, i.e. within micelles.…”

Section: Nmpmentioning

confidence: 99%

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Block copolymer synthesis by controlled/living radical polymerisation in heterogeneous systems

et al. 2016

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Nanostructured soft materials open up new opportunities in material design and application, and block copolymer self-assembly is one particularly powerful phenomenon that can be exploited for their synthesis. The advent of controlled/living radical polymerisation (CLRP) has greatly simplified block copolymer synthesis, and versatility towards monomer types and polymer architectures across the different forms of CLRP has vastly expanded the range of functional materials accessible. CLRP-controlled synthesis of block copolymers has been applied in heterogeneous systems, motivated by the numerous process advantages and the position of emulsion polymerisation at the forefront of industrial latex synthesis. In addition to the inherent environmental advantages of heterogeneous routes, the incidence of block copolymer self-assembly within dispersed particles during polymerisation leads to novel nanostructured materials that offer enticing prospects for entirely new applications of block copolymers. Here, we review the range of block copolymers prepared by heterogeneous CLRP techniques, evaluate the methods applied to maximise purity of the products, and summarise the unique nanoscale morphologies resulting from in situ self-assembly, before discussing future opportunities within the field.2

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Section: An Industrially-attractive Continuous Miniemulsion Was Emplomentioning

confidence: 87%

Section: Figure 8: Afm Images Of Films Prepared From Block (A C) Andmentioning

confidence: 99%

Section: E Properties Of Block Copolymers From Solvophobic Synthesismentioning

confidence: 99%

Section: Nmpmentioning

confidence: 99%

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Block copolymer synthesis by controlled/living radical polymerisation in heterogeneous systems

et al. 2016

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“…Radical segregation efect introduced by (mini)emulsion polymerization in heterogeneous system, on the other hand, reduced the reaction time and suppressed radical termination [64,65]. Combining emulsion polymerization with RAFT, PS-PnBA-PS triblock copolymers with different molecular weight and composition were prepared in shorter reaction time [66]. By varying weight percentage of PS from 20.2 to 71.5%, the ultimate tensile strength was in the range from 3.0 to 12.5 MPa and strain at break was in the range from 90 to 1300%.…”

Section: Poly[2 5-bis[(n-hexogycarbonyl)]styrene] (Pmpcs) Is a Mesogmentioning

confidence: 99%

Thermoplastic Elastomers Based on Block, Graft, and Star Copolymers

Wang¹,

Lu²,

Kang³

et al. 2017

Elastomers

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In this book chapter, we focus on recent advances in thermoplastic elastomers based on synthetic polymers from the aspects of polymer architectures such as linear block, graft, and star copolymers. The irst section is an introduction that covers a brief history and classiication of thermoplastic elastomers (TPEs). The second section summarizes ABA triblock copolymers synthesized by various methods for TPE applications. The third section reviews TPEs based on graft copolymers, and the fourth section reviews TPEs based on star copolymers. The diferences between TPE research in academia and industry are addressed in the last section as a perspective, with a view toward the generation of new, advanced, commercially viable TPEs.

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Thermoplastic Elastomers

Kalita¹,

Parameswaran²,

Singha³

2022

Kirk-Othmer Encyclopedia of Chemical Technology

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Thermoplastic elastomers (TPEs) are biphasic blends of soft amorphous matrix and hard crystalline/glassy domains in which the soft matrix is physically integrated with the help of the hard phase. They possess the physical properties of thermoset rubbers, such as flexibility, softness, and resilience, but they can be processed by plastic processing techniques unlike rubbers. They can be recycled since no external cross‐linking agents are required during processing. This article delineates different synthetic methods (existing as well as the newer methods), structure–property relationship, morphology, environmental issues, health aspects, and applications of various classes of thermoplastic elastomers. Some of the new‐generation thermoplastic elastomers such as acrylate, self‐healing, silicone‐based, fluorinated, ionic, and bio‐based TPEs have been explored in industrial applications due to their attractive properties such as high performance, lower as well as upper service temperature, and high‐temperature resistance. The circular economy and sustainability aspects of the TPEs are also discussed.

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Polystyrene-block-poly(n-butyl acrylate)-block-polystyrene Triblock Copolymer Thermoplastic Elastomer Synthesized via RAFT Emulsion Polymerization

Cited by 121 publications

References 68 publications

Block copolymer synthesis by controlled/living radical polymerisation in heterogeneous systems

Block copolymer synthesis by controlled/living radical polymerisation in heterogeneous systems

Thermoplastic Elastomers Based on Block, Graft, and Star Copolymers

Thermoplastic Elastomers

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