Synthesis of fluorine contained hyperbranched polysiloxane and their effect on the thermal conductivity of epoxy resins

Jia, Yuan; Yang, Juxiang; Liu, Zhen; Li, Beibei

doi:10.1002/app.53315

Cited by 2 publications

(1 citation statement)

References 35 publications

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“…The formation of HBPSi hybrid materials owing to the interactions between HBPSi and polymer networks has been shown to result in a unique 3D‐network structure, highly branched topologies, multifunctionalities, and excellent physical–chemical properties 24,25 . To improve the performance of the polymer matrices, hybrids such as HBPSi/epoxy resin, 26,27 HBPSi/polyimide, 28,29 HBPSi/polyurethane, 24,30 and HBPSi/cellulose 25 have been developed. These new materials have attracted much attention and have been used in a broad range of applications in the energy, 31 aerospace, 23 electronics, 24 and medical 25 industries.…”

Section: Introductionmentioning

confidence: 99%

Poly(methyl methacrylate)/hyperbranched polysiloxane hybrid prepared by gamma‐radiation polymerization: Thermal stability, optical transparence, and UV shielding

Dong,

Mao,

Liang

et al. 2023

J of Applied Polymer Sci

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It is challenging to endow poly(methyl methacrylate) (PMMA) with good dielectric properties and UV absorption capacity while simultaneously overcoming its poor heat resistance. Herein, we report for the first time a novel organic–inorganic hybrid (PMMA‐HBPSi) derived from methyl methacrylate (MMA) and hyperbranched polysiloxane (HBPSi) fabricated via γ‐radiation curing. The typical properties (thermal stability, optical characteristics, and dielectric properties) of the hybrids were systematically investigated and discussed. The results demonstrated that the incorporation of HBPSi into the PMMA resin not only increased the thermal resistance, dimensional stability, and dielectric properties but also remarkably reduced the UV transmittance. Specifically, in comparison with pure PMMA, the initial degradation temperature (Tdi) of PMMA‐HBPSi increased by 31°C, with no phase transition occurred in a temperature range of 60–230°C, thus illustrating a significant improvement in the glass‐transition temperature. Moreover, the thermal expansion coefficient decreased by 86.9% at temperatures exceeding 118°C. The UV transmittance of PMMA was also found to decrease by 80% at 295 nm after the introduction of HBPSi. These attractive features of PMMA‐HBPSi demonstrate that the new approach proposed here is suitable for developing high‐performance organic glasses for optical, aviation, and electronic applications.

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Section: Introductionmentioning

confidence: 99%

Poly(methyl methacrylate)/hyperbranched polysiloxane hybrid prepared by gamma‐radiation polymerization: Thermal stability, optical transparence, and UV shielding

Dong,

Mao,

Liang

et al. 2023

J of Applied Polymer Sci

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Enhancing Longevity and Mechanisms of Controlled-Release Fertilizers Through High Cross-Link Density Hyperbranched Bio-Based Polyurethane Coatings

Su,

Yang,

Gao

et al. 2024

ACS Sustainable Chem. Eng.

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The maturation of biobased polymer synthesis process has led to the rapid adoption of biobased controlled-release fertilizers (BCRFs). Despite this progress, the loose structure, low cross-linking density, and poor water repellency of current biobased coatings result in short controlled-release periods, which do not meet the long-term nutrient demands of crops throughout their reproductive phases. Moreover, existing modifications to address these issues often involve the addition of external additives, which can increase biotoxicity and cost. In this study, castor oil-based hyperbranched polyol (COHBPs) was synthesized from castor oil (CO) using a "one-pot method." We report the development of high cross-linking density biobased hyperbranched polyurethane (COHBPPFs) as a coating for BCRFs. Gel content and SEM analysis demonstrated that COHBPPFs exhibited a high degree of cross-linking. Mechanical testing using an electronic universal testing machine, along with AFM results, highlighted the superior mechanical properties of COHBPPFs compared to traditional coatings. COHBPPFs significantly enhanced controlled release performance, with a 3% coating content providing nearly 50 days of controlled release, a marked improvement over conventional coatings. The controlled release mechanism of COHBPPFs was elucidated by modeling the cross-linking process of COHBPs with PAPI. This study offers a comprehensive examination of CRF coatings from multiple perspectives and provides valuable insights into the development of high cross-link density, environmentally friendly, and renewable biobased CRFs.

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Synthesis of fluorine contained hyperbranched polysiloxane and their effect on the thermal conductivity of epoxy resins

Cited by 2 publications

References 35 publications

Poly(methyl methacrylate)/hyperbranched polysiloxane hybrid prepared by gamma‐radiation polymerization: Thermal stability, optical transparence, and UV shielding

Poly(methyl methacrylate)/hyperbranched polysiloxane hybrid prepared by gamma‐radiation polymerization: Thermal stability, optical transparence, and UV shielding

Enhancing Longevity and Mechanisms of Controlled-Release Fertilizers Through High Cross-Link Density Hyperbranched Bio-Based Polyurethane Coatings

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