Rational design of a novel NDI-based thermoplastic polyurethane elastomer with superior heat resistance

Hu, Shikai; Shou, Tao; Zhao, Xiuying; Wang, Zhao; Zhang, Shijia; Qin, Xuan; Guo, Mingming; Zhang, Liqun

doi:10.1016/j.polymer.2020.122764

Cited by 29 publications

(37 citation statements)

References 38 publications

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“…Compared to common polyurethane materials, HTSSBR-PUs have superior damping performance. [17,30,31] Previous studies suggested that the microphase separation of polyurethane may improve its damping properties. [8] Polyolefin-based polyurethanes usually have an obvious microphase-separation structure because of the great polarity difference between SS and HS and the absence of hydrogen bond between them.…”

Section: Comprehensive Performance Of Htssbr-pusmentioning

confidence: 99%

“…We compare the damping properties of HTSSBR-PUs with those of polyurethane and SSBR composites in previous literatures as displayed in Figure 3. [2,30,31,[34][35][36][37][38][39][40][41][42] It is obvious that HTSSBR-PUs are superior to the common SSBR composites and polyurethane materials in terms of damping performance. Compared to SSBR composites, the hard segments of HTSSBR-PUs are self-reinforcing and require no additional curing process or filler reinforcement.…”

Section: Comprehensive Performance Of Htssbr-pusmentioning

confidence: 99%

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Controllable Design and Preparation of Hydroxyl‐Terminated Solution‐Polymerized Styrene Butadiene for Polyurethane Elastomers with High‐Damping Properties

Zhao

Shou

et al. 2022

Macromol. Rapid Commun.

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Vibration and noise are ubiquitous in social life, which severely damage machinery and adversely affect human health. Thus, the development of materials with high-damping performance is of great importance. Rubbers are typically used as damping materials because of their unique viscoelasticity. However, they do not satisfy the requirements of different applications with various working conditions. In this study, the advantages of the high loss factor of styrene butadiene rubber (SBR) are combined with the strong designability of polyurethane. Hydroxyl-terminated solution-polymerized styrene butadiene rubbers (HTSSBRs) with different structures are prepared using anionic polymerization. HTSSBRs are then used as the soft segment during the synthesis of temperature-tunable high-damping performance polyurethanes (HTSSBR-polyurethanes (PUs)). The prepared HTSSBR-PUs with different structures exhibit excellent loss performance, a maximum loss factor (tan 𝜹 max ) of above 1.60, and an effective damping performance over a wide temperature range compared to traditional SBR and polyurethane. Therefore, this work offers an effective method for the design of damping materials with adjustable properties.

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Section: Comprehensive Performance Of Htssbr-pusmentioning

confidence: 99%

Section: Comprehensive Performance Of Htssbr-pusmentioning

confidence: 99%

Controllable Design and Preparation of Hydroxyl‐Terminated Solution‐Polymerized Styrene Butadiene for Polyurethane Elastomers with High‐Damping Properties

Zhao

Shou

et al. 2022

Macromol. Rapid Commun.

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“…The diisocyanate type, the diisocyanate ratio, and the HS domain aggregation structure are major points associated with the polyurethane heat-resistance performance. [9][10][11] Herein, with the same diisocyanate, the size and distribution of the HS domain were considered to be the most important responsibility for heat-resistance performance of the TPUs. The uniform HS domain means high heat-resistance performance.…”

Section: Heat Resistance Performancementioning

confidence: 99%

“…[9][10][11] To a given molecular weight of macroglycols and chain extender, the HS content could only be increased with a high dosage of diisocyanate. [10][11][12][13][14][15] However, the high amount of diisocyanate could result in wide distribution of HS, which was not beneficial for high-performance TPUs. Many studies confirmed that the mechanical and heat-resistance performances of TPUs could be improved with narrower HS distribution (i.e., uniform HS domains).…”

Section: Introductionmentioning

confidence: 99%

“…[ 8 ] In our previous work, the increase of HS content could significantly improve the heat‐resistance performance of polyurethane. [ 9–11 ] To a given molecular weight of macroglycols and chain extender, the HS content could only be increased with a high dosage of diisocyanate. [ 10–15 ] However, the high amount of diisocyanate could result in wide distribution of HS, which was not beneficial for high‐performance TPUs.…”

Section: Introductionmentioning

confidence: 99%

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New Stratagem for Designing High‐Performance Thermoplastic Polyurethane by Using a New Chain Extender

Shou

et al. 2021

Macro Chemistry & Physics

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The high content and regular distribution of hard segment (HS) are necessary to achieve high‐performance thermoplastic polyurethane (TPU), and the HS unit of TPU is generated from the reaction of diisocyanate and chain extender. However, the traditional chain extenders are mainly aliphatic diol that cannot provide rigid groups to improve polyurethane performances. Herein, a novel chain extender bis(hydroxyethyloxycarbonylamino)hexane (BHH) that contains two urethane groups is designed and used to construct high‐performance TPU by increasing content and regular distribution of HS. BHH is synthesized using ethylene carbonate (EC) and hexamethylenediamine (HDA) via a ring‐opening reaction. Subsequently, the effect of BHH on the polyurethane performances is studied with respect to a typical TPU by using polytetramethylene ether glycol (PTMG) and hexamethylene diisocyanate (HDI) as the starting materials. The amount of HDI considerably differs for each polyurethane, aiming to ensure the same total content of urethane groups. When compared with the traditional ethylene glycol‐extended polyurethane, the size and distribution of the HS domains of the BHH‐extended polyurethane are obviously more homogeneous, which proves BHH‐extended polyurethane has better microphase separation. Furthermore, ordered hydrogen bonding, the mechanical properties, and heat‐resistance performance are significantly improved, suggesting a potential method to design TPU delivering outstanding performance.

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Study on properties of polyurethane elastomers prepared with different hard segment structure

Zhang

Wang

Sang

et al. 2022

J of Applied Polymer Sci

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Four different systems of cast polyurethane elastomers were prepared through two‐step method by adjusting different isocyanates and amine chain extenders. The blocked polyurethane prepolymer synthesized by the reaction of methyl ethyl ketoxime (MEKO) and the prepolymer weakens the reactivity with the amine chain extender. The mechanical and thermal properties of cast polyurethane prepared by different combinations were analyzed through comparison. The microphase separation of hard and soft segments structure in different systems were observed by using atomic force microscope (AFM). Through dynamic mechanical analysis (DMA), the influence of various structures on the loss factor is discussed. Studying the dynamic endogenous heat of cast polyurethane (CPU) by changing the hard segment structure provides a novel idea for the construction of polyurethane with low‐damping structure.

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Rational design of a novel NDI-based thermoplastic polyurethane elastomer with superior heat resistance

Cited by 29 publications

References 38 publications

Controllable Design and Preparation of Hydroxyl‐Terminated Solution‐Polymerized Styrene Butadiene for Polyurethane Elastomers with High‐Damping Properties

Controllable Design and Preparation of Hydroxyl‐Terminated Solution‐Polymerized Styrene Butadiene for Polyurethane Elastomers with High‐Damping Properties

New Stratagem for Designing High‐Performance Thermoplastic Polyurethane by Using a New Chain Extender

Study on properties of polyurethane elastomers prepared with different hard segment structure

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