Transparency‐tunable and moderate‐temperature healable thermoplastic polyurethane elastomer based on bisphenol A chain‐extender

Xiang, Chuanxi; Chen, Hongxiang; Wang, Wanwan; Dai, Qiaoli; Liu, Zhiqiang; Bi, Yuanguo; Zhou, Yu; Zhou, Yang

doi:10.1002/app.49794

Cited by 9 publications

(10 citation statements)

References 41 publications

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“…In order to illustrate the self‐healing ability of four PUs visually, the samples of four PUs with scratches before and after heating at 60°C for different hours were observed by optical microscope. As can be seen in Figure 3, the scratches on SPU sample disappeared and the surface recovered to the original state after heating of 4 h, even the healing process was basically completed in 2 h. The healing of scratches on OPU and CPU were completed after 12 and 24 h, respectively, while the scratches on APU were observable obviously after 24 h. At the same temperature, the shorter healing time of the scratch is, the stronger self‐healing ability of sample is 26 . The results from Figure 3 showed that SPU synthesized by CDE as chain extender had the best self‐healing ability, followed by OPU and CPU, while APU had the lowest self‐healing ability.…”

Section: Resultsmentioning

confidence: 94%

“…As can be seen in Figure 3, the scratches on SPU sample disappeared and the surface recovered to the original state after heating of 4 h, even the healing process was basically completed in 2 h. The healing of scratches on OPU and CPU were completed after 12 and 24 h, respectively, while the scratches on APU were observable obviously after 24 h. At the same temperature, the shorter healing time of the scratch is, the stronger self-healing ability of sample is. 26 The results from Figure 3 showed that SPU synthesized by CDE as chain extender had the best self-healing ability, followed by OPU and CPU, while APU had the lowest self-healing ability. The self-healing ability decrease in the following order: SPU > OPU > CPU > APU, indicating that self-healing effect of PUs is not only related to the presence or absence of disulfide bond, but also to the type and structure of chain extender.…”

Section: Analysis Of Mechanical Properties and Self-healing Propertiesmentioning

confidence: 98%

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Effect of chain extender on microphase structure and performance of self‐healing polyurethane and poly(urethane‐urea)

Wang

et al. 2021

J of Applied Polymer Sci

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In this work, four aliphatic chain extenders, hexanediol (HDO), hexane diamine (HDA), cystamine (CY), and cystine dimethyl ester (CDE), were chosen to synthesize four kinds of polyurethane and poly(urethane-urea)s (PUs), respectively. HDO extended polyurethanes, HDA extended poly(urethane-urea), CY extended poly(urethane-urea), and CDE extended poly(urethane-urea) were denoted as OPU, APU, CPU, and SPU, respectively. The effect of chain extender type on microphase structure and performance of four PUs was investigated. Our research showed that mechanical strength increased in the following order: OPU < SPU < CPU < APU, and self-healing performance increased in the opposite direction. This result is attributed to the increasing degree of microphase separation: OPU < SPU < CPU < APU. The optimal sample SPU has not only excellent mechanical properties (tensile strength of 27.1 MPa and elongation at break of 397.7%), but also exhibits superior self-healing performance (self-healing efficiencies of 95.3% and 93.5% based on tensile strength and elongation at break). The moderate degree of microphase separation between the soft segments and the hard segments, the introduction of disulfide bonds and low degree of hydrogen bonding are responsible for preparing a polyurethane or poly(urethane-urea) system with high mechanical strength and excellent self-healing performance simultaneously. This work provides useful information for us to develop self-healing polyurethane or poly(urethane-urea) materials in the future.

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Section: Resultsmentioning

confidence: 94%

Section: Analysis Of Mechanical Properties and Self-healing Propertiesmentioning

confidence: 98%

Effect of chain extender on microphase structure and performance of self‐healing polyurethane and poly(urethane‐urea)

Wang

et al. 2021

J of Applied Polymer Sci

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“…It also gives properties such as strength and heat resistance [25]. In addition, due to the high refractive index of polycarbonate plastics, it refracts light more than glass and is used as an alternative to it [26]. Owing to these properties, these plastics are used in a wide range such as bullet proof glasses, eyeglass, medical devices, automotive parts, greenhouses, digital floppy disks, police shields, cd and outdoor lighting fixtures.…”

Section: The Uses Of Bisphenol Amentioning

confidence: 99%

An Overview of Analytical Methods for Bisphenol A

Yenil

Yemiş

2020

Pak J Anal Environ Chem

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Our food preparation and eating habits have gradually changed due to the pace of business life. Which have paved the way for the rapid development of ready-made food and plastic production industries. Various packets used for storing and selling ready-made foods and disposable plastic products contain Bisphenol A (BPA) which is very dangerous for health. This substance which can be transferred to the food not only acts like a hormone in the human body but also causes various diseases such as cancer, diabetes and obesity. The sensitive determination of this substance has gained importance in foods, human body fluids and tissues. For this purpose, researchers have developed various chromatographic, electrochemical and spectroscopic methods for BPA determination. In this review, the purpose of use, usage areas, exposure routes of BPA and its harms, methods developed to determine substance in question and pros and cons of various methods are discussed.

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“…However, conventional TPU elastomers also suffer from cold embrittlement problems in low‐temperature conditions, resulting in a loss of elasticity which severely restricts their cryogenic application as general‐purpose or special engineering materials. Although the cryogenic mechanical properties of TPU elastomers can be slightly improved by chemically grafting segments or physical doping fillers, their normal‐temperature mechanical properties are gradually deteriorated or lost with the further improvement of low‐temperature resistance 5–10 . Therefore, successfully achieving excellent low‐temperature resistance and mechanical properties is a big challenge for TPU elastomers.…”

Section: Introductionmentioning

confidence: 99%

The reinforcing effect of cyclic binary secondary amine chain extenders on the cryogenic performance of thermoplastic polyurethane elastomers

Geng

Wang

et al. 2022

J of Applied Polymer Sci

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The poor cryogenic performance of thermoplastic polyurethanes (TPU) severely restricts their extensive application in low‐temperature fields as elastomers. Chain extenders are one of the adjustable items for TPUs to optimize cryogenic performance. In this contribution, three cyclic amine homologs of imidazoline, piperazine and 2‐methylpiperazine are selected as bi‐functional chain extenders. The corresponding TPU elastomers, TPU‐IM, TPU‐PP, and TPU‐2P with identical soft segments, are synthesized by the prepolymer method. All TPUs' structure, morphology and thermodynamic properties were investigated. The results showed that the cyclic amine structure embedded in TPU hard segment can effectively promote microphase separation through hydrogen‐bonded crosslink and polar aggregation on the molecular scale, achieving a glass transition temperature (Tg) as low as −103.9°C for resisting low temperatures. The mechanical properties also demonstrated a 23‐fold improvement compared to the control TPU‐BD. The elastomer TPU‐PP possessed the best all‐around performance with an ideal Tg of −98.4°C and tensile strength of 18.1 MPa. We believe that these TPUs will have potential applications in cryogenic engineering.

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Transparency‐tunable and moderate‐temperature healable thermoplastic polyurethane elastomer based on bisphenol A chain‐extender

Cited by 9 publications

References 41 publications

Effect of chain extender on microphase structure and performance of self‐healing polyurethane and poly(urethane‐urea)

Effect of chain extender on microphase structure and performance of self‐healing polyurethane and poly(urethane‐urea)

An Overview of Analytical Methods for Bisphenol A

The reinforcing effect of cyclic binary secondary amine chain extenders on the cryogenic performance of thermoplastic polyurethane elastomers

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