Elastomers: III. Thermoplastic elastomers

Seymour, Raymond B.; Kauffman, George B.

doi:10.1021/ed069p967

Cited by 10 publications

(6 citation statements)

References 9 publications

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“…Thermoplastic elastomers (TPEs) that combine elasticity with thermoplastic properties are used in wide-ranging applications. − They are typical linear ABA triblock copolymers made up of a soft, rubbery midblock (B) and hard, glassy, or crystalline end blocks (A), − such as polystyrene–poly(butadiene)–polystyrene (SBS) and polystyrene–poly(isoprene)–polystyrene (SIS), which have been the consumer market mainstay. , Because of limited capability to self-heal, unfortunately, the synthetic TPEs generally experience damage and fatigue in service, which decrease their stability, lifetime, and enduring strength. For instance, TPEs with self-healing property maybe a good solution for oxidation-induced crack .…”

Section: Introductionmentioning

confidence: 99%

Spontaneously Healable Thermoplastic Elastomers Achieved through One-Pot Living Ring-Opening Metathesis Copolymerization of Well-Designed Bulky Monomers

Yang

Long

Pan

et al. 2016

ACS Appl. Mater. Interfaces

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We report here a series of novel spontaneously healable thermoplastic elastomers (TPEs) with a combination of improved mechanical and good autonomic self-healing performances. Hard-soft diblock and hard-soft-hard triblock copolymers with poly[exo-1,4,4a,9,9a,10-hexahydro-9,10(1',2')-benzeno-l,4-methanoanthracene] (PHBM) as the hard block and secondary amide group containing norbornene derivative polymer as the soft block were synthesized via living ring-opening metathesis copolymerization by use of Grubbs third-generation catalyst through sequential monomer addition. The microstructure, mechanical, self-healing, and surface morphologies of the block copolymers were thoroughly studied. Both excellent mechanical performance and self-healing capability were achieved for the block copolymers because of the interplayed physical cross-link of hard block and dynamic interaction formed by soft block in the self-assembled network. Under an optimized hard block (PHBM) weight ratio of 5%, a significant recovery of tensile strength (up to 100%) and strain at break (ca. 85%) was achieved at ambient temperature without any treatment even after complete rupture. Moreover, the simple reaction operations and well-designed monomers offer versatility in tuning the architectures and properties of the resulting block copolymers.

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Section: Introductionmentioning

confidence: 99%

Spontaneously Healable Thermoplastic Elastomers Achieved through One-Pot Living Ring-Opening Metathesis Copolymerization of Well-Designed Bulky Monomers

Yang

Long

Pan

et al. 2016

ACS Appl. Mater. Interfaces

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“…Therefore, small temperature changes in the test specimens generate visible thermal readings that infrared detectors can successfully capture to yield thermogram [3,[12][13][14]. [15,16] and some of the first use of this plastic was during WWII, where it was applied as a coating on the German airplanes [17]. Polyurethane belongs to the chemical class called reaction polymers [18].…”

Section: Infrared Thermographymentioning

confidence: 99%

Determining Thermal Properties of Polyurethane by Solving the Heat Equation and IR Imaging

2022

IJM

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All materials have different and unique thermal properties that determine how the temperature changes when a material is subjected to a temperature difference. This study was intended to investigate the thermal properties of a polymer called Polyurethane, focusing on anti-seepage and anti-abrasion polyurethane. The thermal conductivity and heat transfer coefficient of cold polyurethane specimens have been calculated by capturing the infrared signature using a FLIR T1030Sc Infrared camera and comparing the results with simulated results. The simulations were carried out in MATLAB®, and the solution is based on the Heat equation. This paper describes the driving mechanisms behind the Heat equation and how the approximated solution to the Heat equation is obtained by discretizing through a forward-time central-space (FTCS) finite-difference method. The results reveal that the heat transfer coefficient for anti-abrasion Polyurethane is almost four times that for anti-seepage Polyurethane. The thermal conductivity for the respective has a difference of a factor of two. A good agreement between the experimental and the numerical study was achieved. This study is helpful for the potential use of polyurethane material in Arctic regions either as a coating material for pipes or as a sealant in the oil and gas industry.

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“…Discussion of molecular features of rubberlike elasticity first requires its definition: large deformability with essentially complete recoverability. In order for a material to exhibit this type of elasticity, three molecular requirements must be met: (i) the material must consist of polymeric chains, (ii) the chains must have a high degree of flexibility and mobility, and (iii) the chains must be joined into a network structure (1,3,(11)(12)(13)(14)(15)(16).…”

Section: Rubberlike Elasticity and Network Structurementioning

confidence: 99%

“…Analogous strategies are used in the case of elastomers. For example, introducing the unperturbed dimensions <r 2 > o of the network chains yields (14) where <r 2 > represents the mean-square dimensions of the network chains in the undeformed state. Such chain models (10) can be made very realistic by adopting the correct structural information (bond lengths, bond angles, rotational state angles), and thermodynamic information (conformational preferences, including cooperativity) (6)(7)(8).…”

Section: Molecular Equations Of Statementioning

confidence: 99%

Some Aspects of Rubberlike Elasticity Useful in Teaching Basic Concepts in Physical Chemistry

Mark

2002

J. Chem. Educ.

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Elastomers: III. Thermoplastic elastomers

Abstract: Development, properties, and applications of thermoplastic elastomers.

Cited by 10 publications

References 9 publications

Spontaneously Healable Thermoplastic Elastomers Achieved through One-Pot Living Ring-Opening Metathesis Copolymerization of Well-Designed Bulky Monomers

Spontaneously Healable Thermoplastic Elastomers Achieved through One-Pot Living Ring-Opening Metathesis Copolymerization of Well-Designed Bulky Monomers

Determining Thermal Properties of Polyurethane by Solving the Heat Equation and IR Imaging

Some Aspects of Rubberlike Elasticity Useful in Teaching Basic Concepts in Physical Chemistry

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