Synthesis and properties of photopolymerizable bifunctional polyether-modified polysiloxane polyurethane acrylate prepolymer

Cheng, Jun; Li, Minglei; Cao, Yue; Gao, Yanjing; Liu, Jiancheng; Sun, Fang

doi:10.1080/01694243.2015.1087255

Cited by 19 publications

(17 citation statements)

References 24 publications

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“…By comparison, the transmittance of UV-cured materials in this study is far higher than that of UV-cured polyether-modified polysiloxane PUA reported by Cheng et al (80%, 400−800 nm). 17 These results indicate that the UV-cured materials may be suitable candidates for package or protecting optical devices.…”

Section: Resultsmentioning

confidence: 88%

“…13 Since optical transmittance is vastly sought-after for optical devices, 3,13 effective chemical modification strategies have been developed to enhance the mechanical properties of transparent silicone materials. 13,16,17 As we know, polyurethanes (PUs) are one of the highquality elastomers due to their excellent performance such as excellent physical, chemical, and mechanical properties. 18−21 Kim and co-workers prepared a series of polydimethylsiloxane−PU elastomers with a tensile strength of 6.75−10.…”

Section: Introductionmentioning

confidence: 99%

“…Flexibility and mechanical performance are essential for transparent polymer materials having promising applications in some optical and electronic device packaging or protecting. − Transparent silicone elastomers are important candidates in optical and electronics fields by virtue of their conspicuous properties such as UV resistance ability, a wide range of service temperatures, electrical insulating property, and so on. − Despite these merits for transparent silicone materials, the tensile strength of unreinforced pure silicone materials is not higher than 0.4 MPa. − Although commercial silicone elastomers Sylgard 184 and 186 and their blends have superior tensile strength than unreinforced pure silicone materials, their tensile strength is still no more than 2.4 MPa. , The tensile strength of silicone materials can be obviously improved by adding various inorganic fillers such as nano-SiO 2 and carbon nanotubes; unfortunately, the transmittance of these silicone composites generally is too low to meet the requirements of optical devices . Since optical transmittance is vastly sought-after for optical devices, , effective chemical modification strategies have been developed to enhance the mechanical properties of transparent silicone materials. ,, …”

Section: Introductionmentioning

confidence: 99%

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UV-Cured Transparent Silicone Materials with High Tensile Strength Prepared from Hyperbranched Silicon-Containing Polymers and Polyurethane-Acrylates

et al. 2021

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Flexibility and mechanical performance are essential for transparent silicone materials applied in some optical and electronic devices; however, the tensile strength of transparent silicone materials is fairly low. To overcome this problem, a kind of UV-cured transparent flexible silicone material with quite a high tensile strength and elongation at break was developed through UV-initiated thiol− ene reaction by hyperbranched silicon-containing polymers (HBPs) with a thiol substitute and acrylate-terminated polyurethanes. Unexpectedly, it is found that both the tensile strength and elongation at break of the transparent silicone materials are extraordinarily high, which can reach 3.40 MPa and 270.0%, respectively. The UV-cured materials have good UV resistance ability because their transmittance is still as high as 93.4% (800 nm) even when aged for 40 min in a UV chamber of 10.6 mW cm −2 . They exhibit outstanding adhesion to substrates, and the adhesion to a glass slide, wood, and a tin plate is grade 1. The promising results encourage us to further improve the mechanical performance of flexible transparent silicone materials by effective chemical modification strategies with HBPs. An attempt was made to apply the UV-cured materials in a Gel-Pak box and it could be proved that the UV-cured materials may be one of the good candidates for use as packaging or protecting materials of optical or electronics devices such as the Gel-Pak product.

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Section: Resultsmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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UV-Cured Transparent Silicone Materials with High Tensile Strength Prepared from Hyperbranched Silicon-Containing Polymers and Polyurethane-Acrylates

et al. 2021

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“…It has a theoretical functionality of 16 and a real one of 13, a density of 1.13 g•cm −3 and a Newtonian viscosity of 0.3 Pa s at 25 • C. The photo-initiator was diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide (TPO Esacure, Lamberti, Gallarate, Italy). Three different siloxane comonomers were used, namely an acryloxy-terminated polydimethylsiloxane (PDMSat, ABCR GmbH, Karlsruhe, Germany), and two polyether-modified polysiloxane polyurethane acrylates (PESiUA1 and PESiUA2) whose synthesis and structures are described elsewhere [24]. Table 1 provides molecular weight, number of repeating siloxane units, and amount of Si in the three comonomers.…”

Section: Methodsmentioning

confidence: 99%

Bio-Inspired Fluorine-Free Self-Cleaning Polymer Coatings

et al. 2018

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Bio-inspired fluorine-free and self-cleaning polymer coatings were developed using a combination of self-assembly and UV-printing processes. Nasturtium and lotus leaves were selected as natural template surfaces. A UV-curable acrylate oligomer and three acrylated siloxane comonomers with different molecular weights were used. The spontaneous migration of the comonomers towards the polymer–air interface was found to be faster for comonomers with higher molecular weight, and enabled to create hydrophobic surfaces with a water contact angle (WCA) of 105°. The replication fidelity was limited for the nasturtium surface, due to a lack of replication of the sub-micron features. It was accurate for the lotus leaf surface whose hierarchical texture, comprising micropapillae and sub-micron crystalloids, was well reproduced in the acrylate/comonomer material. The WCA of synthetic replica of lotus increased from 144° to 152° with increasing creep time under pressure to 5 min prior to polymerization. In spite of a water sliding angle above 10°, the synthetic lotus surface was self-cleaning with water droplets when contaminated with hydrophobic pepper particles, provided that the droplets had some kinetic energy.

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“…Meanwhile, the massive silicone dosages are necessary in order to guarantee sufficient surface aggregation of PDMS segments for high hydrophobicity, as their movements were restricted by the polymer main chains. However, it would lead to serious microphase separation, decreased mechanical properties and high cost, when the ordered hard-segments domains (by hydrogen bonds) distribute in the nonpolar PDMS-segments domains [ 22 , 23 , 24 ]. In order to keep the balance between hydrophobicity and silicone loading, a workable way is to incorporate silicone into the side chains of SPUA.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Tris(trimethylsiloxy)silyl Modified Polyurethane Acrylates and Their Application in Textile Treatment

Xiong

et al. 2020

Polymers

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Three series of silicone modified polyurethane acrylate (SPUA) prepolymers were prepared from dicyclohexylmethane-4, 4′-diisocyanate (HMDI), PPG1000, triethylene glycol (TEG), 2-hydroxyethyl acrylate (HEA), and multi-hydroxyalkyl silicone (MI-III) with tris(trimethylsiloxy)silyl propyl side groups. Their structures were confirmed by 1H NMR, 13C NMR, and Fourier transformed infrared (FTIR) analysis, and SPUA films were obtained by UV curing. The properties of films were investigated by attenuated total reflection (ATR)-FTIR, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), water contact angle (WCA), thermogravimetric analysis (TGA), differential scanning calorimeter (DSC), water and hexane resistance, and tensile testing. The results showed that the structures and dosages of MI-III could influence the polymerization properties, surface properties, water and n-hexane resistance, and thermal and tensile properties of SPUA. For instance, the surface aggregation of tris(trimethylsiloxy)silyl propyl groups (even ~2.5 wt%) could endow SPUA films with less microphase separation, good hydrophobicity, lipophilicity, thermal stability, and mechanical properties. Interestingly, obvious regular winkles appeared on the surfaces of SPUAIII films, which are characterized by relatively high WCA values. However, relatively smooth were observed on the surfaces of SPUAIII films, which also exhibit lower water absorption ratio values. Furthermore, the ordinary cotton textiles would be transformed into hydrophobic and oleophilic textiles after treating with SPUA simply, and they were used in the oil/water separation study. Among them, consistent with water and hexane resistance analysis of SPUA films, SPUAII treated cotton textiles are characterized by relatively small liquid absorption capacity (LAC) values. Thus, phenyl groups and side-chain tris(trimethylsiloxy)silyl propyl groups are helpful to improve the hydrophobicity and lipophilicity of SPUA films. SPUAII-5 (even with 5 wt% MII) treated cotton textiles could efficiently separate the oil/water mixture, such as n-hexane, cyclohexane, or methylbenzene with water. Thus, this material has great potential in the application of hydrophobic treatment, oil/water separation, and industrial sewage emissions, among others.

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Synthesis and properties of photopolymerizable bifunctional polyether-modified polysiloxane polyurethane acrylate prepolymer

Cited by 19 publications

References 24 publications

UV-Cured Transparent Silicone Materials with High Tensile Strength Prepared from Hyperbranched Silicon-Containing Polymers and Polyurethane-Acrylates

UV-Cured Transparent Silicone Materials with High Tensile Strength Prepared from Hyperbranched Silicon-Containing Polymers and Polyurethane-Acrylates

Bio-Inspired Fluorine-Free Self-Cleaning Polymer Coatings

Preparation and Characterization of Tris(trimethylsiloxy)silyl Modified Polyurethane Acrylates and Their Application in Textile Treatment

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