Characteristics of Polycarbonate Soft Segment-Based Thermoplastic Polyurethane

Wu, Chien-Hui; Chen, Chin‐Wen; Chen, Po‐Han; Chen, Yi-Shin; Chuan, Fu-Sheng; Rwei, Syang‐Peng

doi:10.3390/app11125359

Cited by 10 publications

(4 citation statements)

References 54 publications

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“…By varying the amount of IS, the resulting PU can exhibit either rigid plastic properties or soft elastomer properties. As shown in Figure b, the polyurethane synthesized in this work possesses higher tensile strength than other literature. ,,,,− As shown in Figure f, 0.05 g of IS 5 PCU can support the weight of 1.5 kg of water without fracture. The ISPCUs prepared in this study provide effective ideas to develop sustainable nonisocyanate polyurethane materials with excellent mechanical properties.…”

Section: Resultsmentioning

confidence: 66%

Nonisocyanate Polyurethanes Originated from Biobased Isosorbide with Good Combined Properties

Song,

He,

Xie

et al. 2024

ACS Appl. Polym. Mater.

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Polyurethane (PU) is conventionally synthesized via the isocyanate route, which has been widely reported to be hazardous to the environment and humans. Consequently, there is an urgent need to develop an environmentally friendly method for the preparation of nonisocyanate polyurethanes (NIPUs). Herein, a green nonisocyanate synthetic route to polyurethane, originating from dimethyl carbonate, 1,6-hexanediamine, 1,6-hexanediol, and rigid biobased isosorbide is introduced to enhance the mechanical properties and heat deflection temperature of NIPUs. A series of biobased isosorbide nonisocyanate polycarbonate-based polyurethanes (ISPCUs) were synthesized by adjusting the isosorbide content in the hard segments. The results show that the rigid ring structure of isosorbide enhances the mechanical and thermal properties of PU. Notably, the melting point of ISPCUs increased from 93 to 119 °C, and the heat deflection temperature has been enhanced to 85 °C from 41 °C of NIPUs without isosorbide. The mechanical properties improved substantially, especially the tensile strength, which increased evidently from 18 MPa of PU to 65 MPa of ISPCUs. This work provides a method to synthesize biobased NIPUs with exceptional heat resistance and mechanical properties.

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Section: Resultsmentioning

confidence: 66%

Nonisocyanate Polyurethanes Originated from Biobased Isosorbide with Good Combined Properties

Song,

He,

Xie

et al. 2024

ACS Appl. Polym. Mater.

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“…Indeed, the combination of MDI and PTMG has been used as a commercial TPU . In addition, the combination of MDI and HDI as hard segments and PBA, PCL, and PPG as soft segments also has potential application prospects in various fields. − …”

Section: Computational Detailsmentioning

confidence: 99%

Shock Hugoniot Calculations of Newly Designed Thermoplastic Elastomers and Comparison with Classical Binder Estane

Zhou,

Li,

Cao

et al. 2024

J. Phys. Chem. B

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Our purpose is to design excellent binder candidates used in polymer-bonded explosives (PBX) according to the calculated shock of Hugoniot. Here, we mainly examined the thermoplastic elastomer (TPE) binders commonly used in PBX formulations. Equilibrium molecular dynamics (MD) simulation and mixing rule methods were used to calculate the shock Hugoniot values of 180 newly designed TPEs. We focused on the influence of the polymerization degree, contents, and types of soft and hard segments composed of TPEs on the shock Hugoniot and compared them with the classic PBX binder, Estane. The results show that the hard segment has an effect on the Hugoniot curve, which gradually diminishes as the degree of polymerization increases. The underlying physical mechanism can be attributed to the presence of a large number of hydrogen bonds in hard segment domains. The shock Hugoniot of TPEs also depends on the type of soft segments. The volume compression rate of TPEs decreases with increasing content of hard segments under a given shock. By comparing with Estane, a TPE binder commonly used in PBX, we ultimately chose several new TPEs with the potential to serve as PBX binders in terms of shock performance.

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“…Diols are soft segments, which are divided into polyether, polyester, and polycarbonate diols. Polycarbonate diols have excellent mechanical properties and weather, moisture, and heat resistance properties [16,17]. Owing to their high polarity, polycarbonate diols can also be used in coatings and binders [18,19].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characteristic Valuation of a Thermoplastic Polyurethane Electrode Binder for In-Mold Coating

Hong,

Kwon,

Sun

et al. 2024

Polymers

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A polyurethane series (PHEI-PU) was prepared via a one-shot bulk polymerization method using hexamethylene diisocyanate (HDI), polycarbonate diol (PCD), and isosorbide derivatives (ISBD) as chain extenders. The mechanical properties were evaluated using a universal testing machine (UTM), and the thermal properties were evaluated using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The PHEI-PU series exhibited excellent mechanical properties with an average tensile strength of 44.71 MPa and an elongation at break of 190%. To verify the applicability of different proportions of PU as an electrode binder, PU and Ag flakes were mixed (30/70 wt%) and coated on PCT substrates, the electrodes were evaluated by four-point probe before and after 50% elongation, and the dispersion was evaluated by scanning electron microscopy (SEM). The electrical resistance change rate of PHEI-PU series was less than 20%, and a coating layer with well-dispersed silver flakes was confirmed even after stretching. Therefore, it exhibited excellent physical properties, heat resistance, and electrical resistance change rate, confirming its applicability as an electrode binder for in-mold coating.

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Characteristics of Polycarbonate Soft Segment-Based Thermoplastic Polyurethane

Cited by 10 publications

References 54 publications

Nonisocyanate Polyurethanes Originated from Biobased Isosorbide with Good Combined Properties

Nonisocyanate Polyurethanes Originated from Biobased Isosorbide with Good Combined Properties

Shock Hugoniot Calculations of Newly Designed Thermoplastic Elastomers and Comparison with Classical Binder Estane

Synthesis and Characteristic Valuation of a Thermoplastic Polyurethane Electrode Binder for In-Mold Coating

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