Effect of Soft Segment Polydispersity on the Elasticity of Polyurethane Elastomers

Prisăcariu, Cristina; Scortanu, Elena; Coseri, Sergiu; Agapie, Bogdan

doi:10.1021/ie303212s

Cited by 20 publications

(18 citation statements)

References 18 publications

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“…Figure shows the temperature dependence of the storage modulus ( E ′), loss modulus ( E ″), and damping factor (tan δ) for the PU composite modified with 8% hydroxyl silicone oil; these are the typical DMA curves of the composite with excellent properties in this study. Tan δ, defined by the ratio E ″/ E ′, was used to evaluate the damping properties of the composites . The peak of tan δ corresponded to the T g of the materials.…”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of silicone oil modified polyurethane damping materials

Tian

et al. 2019

J of Applied Polymer Sci

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A series of polyurethane (PU) composites, which could be used as damping materials, with different contents of hydroxyl silicone oil were successfully prepared in this study. The damping and mechanical properties, thermal stability, and molecular groups of the PU composites were characterized by dynamic mechanical analysis, electronic tensile analysis, thermogravimetric analysis, and Fourier transform infrared (FTIR) spectroscopy, respectively. The surface morphology was also observed via scanning electron microscopy (SEM). FTIR spectroscopy showed that the hydroxyl silicone oil was embedded in the PU. The soft and hard segments of the PU composites appeared thermodynamically incompatible and showed microphase separation, as shown by the SEM pictures. The PU composite with 8% hydroxyl silicone oil was found to possess the best synthetic properties among these composites. The maximum values of tan δ were 0.376, 0.561, and 0.573 at 1, 10, and 20 Hz, respectively. The temperature range for the use of damping materials becomes wider at 1 Hz. Frequencies of 10 and 20 Hz might suitable surroundings for the application of damping materials. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47579.

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Section: Resultsmentioning

confidence: 99%

Preparation and characterization of silicone oil modified polyurethane damping materials

Tian

et al. 2019

J of Applied Polymer Sci

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“…Thermal stability of polyurethanes is related to the structure, chemical composition and molar ratio of the hard segment and soft segment . Moreover, it is generally accepted that the thermal degradation process in polyurethanes is a two‐stage or three‐stage decomposition, which mainly depends on the chemical structure, and the composition of polyols, diisocyanates, and chain extenders .…”

Section: Resultsmentioning

confidence: 99%

Influence of the soft segment nature on the thermomechanical behavior of shape memory polyurethanes

Sáenz-Pérez

Laza

García-Barrasa³

et al. 2017

Polymer Engineering & Sci

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Shape‐memory polyurethanes (SMPUs) represent a highly interesting class of materials due to their applications in different sectors such as biomedical, textile, and aerospace. Moreover, it is possible to synthesize a variety of polyurethanes with different molecular architectures just choosing properly the chemical structure of their components. In this work, it is described the influence of the soft segment on the thermomechanical properties and shape memory behavior of shape memory polyurethanes. The synthesis, based on two‐step polymerization, was prepared by two different soft segments: poly(oxytetramethylene) glycol (PTMG) or poly(ethylene glycol) (PEG). Depending on the molecular architecture achieved, the materials present different properties that were studied by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). Furthermore, the shape memory response of thermally activated SMPUs is determined qualitative and quantitatively by visually monitoring the shape recovery process and by thermomechanical analysis (TMA), respectively. All developed compositions have shown good shape memory behavior, with recovery ratios higher than 99.8%. POLYM. ENG. SCI., 58:238–244, 2018. © 2017 Society of Plastics Engineers

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“…It is generally accepted that the thermal degradation process in polyurethanes is a twostage or three-stage decomposition, which mainly depends on the chemical structure, and the composition of polyols, diisocyanates, and chain extenders 7,8 . The three synthetized polyurethanes display typical two-stage degradation.…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

Synthesis and characterization of shape memory polyurethanes

Sáenz-Pérez

Laza

León

et al. 2015

Proceedings of MOL2NET, International Conference on Multidisciplinary Sciences

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Shape memory polymers (SMPs) have attracted extensive attention from basic and fundamental research to industrial and practical applications because they have emerged as a cheap and efficient alternative to well-known metallic shape-memory alloys. Among them, shape memory polyurethanes (SMPUs) own different applications such as the textile finishing, adhesives, coatings, automotive, furniture, construction, and thermal insulation and footwear industries, due to it can be synthesized with different types of molecular architectures by manipulating their composition and choosing properly the chemical structure of their components. In this work, the synthesis and characterization of shape memory polyurethanes, based on two-step polymerization, is reported. The hard segment of SMPU was composed of diisocyanate and a chain extender. On the other hand, the soft segment was prepared by polyols with different molecular weights. Depending on the structure of the synthetized polyurethanes, the materials presented different properties. Thermal characterization was performed by means of Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA). Furthermore, mechanical properties and shape memory effect were also determined by Dynamic Mechanical Analysis (DMA) and Thermo-Mechanical Analysis (TMA).

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Effect of Soft Segment Polydispersity on the Elasticity of Polyurethane Elastomers

Cited by 20 publications

References 18 publications

Preparation and characterization of silicone oil modified polyurethane damping materials

Preparation and characterization of silicone oil modified polyurethane damping materials

Influence of the soft segment nature on the thermomechanical behavior of shape memory polyurethanes

Synthesis and characterization of shape memory polyurethanes

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