Synthesis of hydroxy silane coupling agent and the silane-terminated polyurethane chain-extended by butanediol

Chi, Quan-chao; Li, Jian; Wang, Chenyi; Ren, Qiang

doi:10.1007/s11998-022-00619-9

Cited by 5 publications

(5 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Organosilanes, known for their thermal stability, low toxicity, minimal surface energy, reduced glass transition temperature, high-temperature resilience, and hydrophobic characteristics, are instrumental in the development of silane-modified polyurethane (SPU). This high-performance polymer amalgamates the superior qualities of silicone and polyurethane by modifying the main chain of polyurethane with a silane coupling agent. − A notable advantage is the stronger bonding energy of the Si–O bonds compared to the C–C bonds in polyurethane, enhancing the thermal stability and mechanical properties of the polymer . In the curing process of SPU, alkoxysilanes initially undergo hydrolysis during moisture curing, releasing methanol or ethanol and forming silanol structures.…”

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.

View full text Add to dashboard Cite

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.

show abstract

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.

View full text Add to dashboard Cite

show abstract

“…Silane-terminated polyurethane/polyether/polyurea has been widely used as adhesives or sealants in the construction, automotive, and electronic industries due to its strong substrate adhesion, elasticity, water resistance, and moisture-curable characteristics. − Moreover, these polymers containing silane groups permit the formation of reactive silanol groups that can be used to cross-link other materials or form chemical bonding with substrates. − Therefore, introducing these silane-terminated polymers into a polymer network may be feasible to improve substrate adhesion but not decline other properties. Herein, we present a polysiloxane coating with antifouling ability and strong substrate adhesion by combining bis-silane-terminated polyurea (SPU) with stereoscopic oligosiloxane nanoclusters and a small amount of antifouling reactive amphiphilic polymer (RAP) via sol–gel chemistry.…”

Section: Introductionmentioning

confidence: 99%

Surface-Enriched Amphiphilic Polysiloxane Coating with Superior Antifouling Ability and Strong Substrate Adhesion

Zhang

Xie

Zhang

et al. 2023

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

The coexistence of superior antifouling ability and strong substrate adhesion is a typical trade-off for a silicone coating but is highly desirable in numerous applications. Herein, we present a surface-enriched antifouling coating consisting of a bis-silane-terminated polyurea (SPU), an oligosiloxane nanocluster, and a bi-silanol-terminated poly(dimethylsiloxane) with fluorocarbon and poly(ethylene glycol) side chains as a reactive amphiphilic polymer (RAP). The oligosiloxane nanoclusters can cross-link the flexible SPU into a tough polymer network and interlink the polymer network to the substrate, whereas the low-surface-energy RAP can self-enrich on the surface during coating formation. Such a polysiloxane coating exhibits high transparency (>85% transmittance), high tensile strength (∼12 MPa), superior fouling resistance against proteins and bacteria, and strong adhesion strength on various substrates including glass, ceramic, steel, Ti, and epoxy (3–15 MPa). This research provides a universal and tunable approach for the future design of antifouling coatings in flexible electronics, medical devices, and marine industries.

show abstract

“…The NCO:OH ratio can be adjusted to alter this ratio, resulting in changes in molecular weight, glass transition temperature, thermal stability, hardness, and tensile strength among other properties. [15,16] The phase structure and properties of PU elastomers are significantly influenced by microphase separation and its degree, the uniformity of the distribution of the hard segment in the soft segment, and the chemical structure of hard as well as soft sections. [17,18] For instance, Sanchez-Adsuar et al [19] employed a physical modification method to manufacture thermoplastic PU elastomers and observed an improvement in performance by altering the quantity of rosin, which was found to be caused by changes in the ratio of the hard and soft segment structure.…”

Section: Introductionmentioning

confidence: 99%

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

Guo

Shangguan

Liu

et al. 2023

Polymer Engineering & Sci

View full text Add to dashboard Cite

This study describes the synthesis of a hydroxyl silane coupling agent (HO‐silane) through a click reaction between SH in 3‐(trimethoxysilyl)propane‐1‐thiol (KH‐590) and CC in 2‐hydroxyethyl methacrylate (HEMA). This coupling agent was subsequently employed in the synthesis of silane‐modified polyurethane (SPU) resin which could be moisture‐cured at room temperature. The influence of r values (the molar ratio of NCO and OH) on the characteristics of SPU resins was investigated. These results reveal that an increase in the r value leads to a reduction in viscosity from 4.9 × 105 to 1.9 × 105 mPa·s, a rise in tensile strength from 0.88 to 0.98 Mpa followed by a decline to 0.69 MPa, and a reduction in extension at fracture from 236% to 94%. A SPU resin with a viscosity of approximately 3.6 × 105 mPa·s, tensile strength of 0.98 MPa, and elongation at break of 218% can be produced when the r value is 1.8. In addition, a silane‐modified polyurethane (MS) sealant with a tensile strength of 1.6 MPa in addition to elongation at break at 336% could be produced using the aforementioned SPU resin.

show abstract

Synthesis of hydroxy silane coupling agent and the silane-terminated polyurethane chain-extended by butanediol

Cited by 5 publications

References 28 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

Surface-Enriched Amphiphilic Polysiloxane Coating with Superior Antifouling Ability and Strong Substrate Adhesion

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

Contact Info

Product

Resources

About