Synthesis of hydroxyl silane coupling agent and its application in preparation of silane‐modified polyurethane

Guo, Zhixiong; Shangguan, HanQun; Liu, Qianwei; Li, Y.; Liu, Xingjiang; Sun, Anbang; Li, Yuhan; Wei, Liuhe

doi:10.1002/pen.26369

Cited by 3 publications

(1 citation statement)

References 30 publications

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“…This versatile material, renowned for its exceptional flexibility, wear resistance, and mechanical properties, has found widespread use in various applications. − Polyurethane adhesives, in particular, are pivotal in both everyday life and industrial contexts. − Traditionally, polyurethane adhesives utilize a free isocyanate group as a reactive end group. This group reacts with atmospheric water vapor during curing, releasing CO 2 and consequently causing bubble formation within the adhesive layer, which impairs bonding performance. , Furthermore, solvent-based polyurethane adhesives typically emit volatile organic compounds (VOCs) throughout the curing process, posing significant environmental and health risks. − …”

Section: Introductionmentioning

confidence: 99%

Silane-Modified Hyperbranched Polyurethane with High Strength, High Transparency, and Low Viscosity

Ren,

Niu,

Zhang

et al. 2024

ACS Appl. Polym. Mater.

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Silane-modified polyurethanes (SPU-MDI, SPU-IPDI, and SPU-HDI) were synthesized by reacting various isocyanates (MDI, IPDI, and HDI) with poly(ether triol), followed by siloxane capping. The branched structures and properties of these SPUs were systematically characterized and evaluated. These SPU resins, upon moisture curing, yield elastomers exhibiting excellent mechanical properties and high transmittance (>92%). Incorporating polyether tertiary alcohol into the polymer chain markedly reduces the viscosity and average particle size of the SPUs due to its de-entangling effect. Specifically, the SPU-HDI resin displayed a low viscosity of 2548 mPa•s at 25 °C and an average particle size of 3.12 nm. Notably, elastomers derived from SPU-MDI and SPU-IPDI resins demonstrated tensile strengths greater than 10 MPa, surpassing that of SPU-HDI-based elastomer (∼5.0 MPa). This significant enhancement broadens the potential applications of these materials.

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Section: Introductionmentioning

confidence: 99%

Silane-Modified Hyperbranched Polyurethane with High Strength, High Transparency, and Low Viscosity

Ren,

Niu,

Zhang

et al. 2024

ACS Appl. Polym. Mater.

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A strategy for synthesis of silane terminated polyether triggered by click reaction and its application in preparation of modified silane sealants

Li,

Guo,

et al. 2023

AIP Advances

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A new hydroxy-silane coupling agent was synthesized from 3-butene-1-alcohol and mercaptopropyl-3-methoxysilane based on a click reaction between double bonds and sulfhydryl groups and was successfully used in the synthesis of silane-modified polyether (STPE). The effect of molecular weight of polypropylene glycol (PPG) on the properties of silane-modified polyether was studied. It was found that with the increase in PPG molecular weight, the initial thermal decomposition temperature and hardness of STPE elastomers decreased, but the molecular structure hardly changed. In addition, with the increase in molecular weight, the elongation at break of the elastomer will gradually increase, but the tensile strength of the elastomer does not change much. When the molecular weight reaches 20 000 g/mol, the resin with a viscosity of 1.6 × 105 mPa s can be obtained, and the elongation at break of the cured elastomer reaches 383.4% and the tensile strength is 0.25 MPa. After the STPE resin was prepared into a silane modified sealant, the tensile strength reached 1.31 MPa and the elongation at break reached 406.2%, which had the best mechanical properties among the prepared sealants. This shows that the sealant prepared from high molecular weight resin has stronger mechanical properties, which provides a new idea for the preparation of sealants.

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Development and Characterization of the Shale Stratum Well Wall Stabilized with Nanosomal Sealing Agent

Li,

Gao,

Tang

et al. 2024

Polymers

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The development of micro cracks in shale formations can easily lead to wellbore instability caused by liquid phase invasion. In order to effectively seal the shale micropores, the surface treatment of nano-SiO2 particles was developed using the silicane coupling agent A-1891. Then, the temperature-sensitive polypenic acrylamide polymer was modified onto the surface of the nanoprocal particle through reaction to obtain the nanosomal blocking agent ASN. The infrared spectrum shows that there are chemical bonds between the generated polymer chains, rather than simple physical composites, indicating the successful synthesis of the temperature-responsive nanosealing agent ASN. The particle size analysis showed that the synthesized nanoparticles in ASN have a uniform particle size distribution and display no agglomeration phenomenon. Applying ASN as a sealing agent in drilling fluid effectively fills the nanoscale micropores and microcracks in shale, making shale denser and significantly improving the wellbore stability of shale formations. In addition, it has good temperature resistance, can adapt to reservoirs at different temperatures, is non-toxic and environmentally friendly, and has good prospects for stable applications in shale formation wellbore.

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Synthesis of hydroxyl silane coupling agent and its application in preparation of silane‐modified polyurethane

Cited by 3 publications

References 30 publications

Silane-Modified Hyperbranched Polyurethane with High Strength, High Transparency, and Low Viscosity

Silane-Modified Hyperbranched Polyurethane with High Strength, High Transparency, and Low Viscosity

A strategy for synthesis of silane terminated polyether triggered by click reaction and its application in preparation of modified silane sealants

Development and Characterization of the Shale Stratum Well Wall Stabilized with Nanosomal Sealing Agent

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