Benzocyclobutene resin with m-carborane cages and a siloxane backbone: a novel thermosetting material with high thermal stability and shape-memory property

Huang, Xin; Zhang, Liqun; Deng, Guoqing; Meng, Zhen; Jia, Xudong; Xi, Kai

doi:10.1039/c5ra27647k

Cited by 17 publications

(11 citation statements)

References 43 publications

(58 reference statements)

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“…Improvement in the thermal, mechanical, and oxidative resistance of polymers and composites after the incorporation of silsesquioxanes is known . Furthermore, materials incorporating boron clusters have a high thermal stability. ,, In this line, thermogravimetric analysis (TGA) of 3 and 4 under argon shows a thermal behavior very different from that of nonfunctionalized OVS (Figure S3). The pristine OVS shows an 82% weight loss near 290 °C, whereas both 3 and 4 undergo a very low weight loss between 350 and 600 °C, and after heating to 900 °C, around 88% of the initial weight was recovered.…”

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confidence: 94%

Redox-Active Metallacarborane-Decorated Octasilsesquioxanes. Electrochemical and Thermal Properties

et al. 2016

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confidence: 94%

Redox-Active Metallacarborane-Decorated Octasilsesquioxanes. Electrochemical and Thermal Properties

et al. 2016

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“…Due to the high rigidity and noncoplanarity, highperformance polymer materials such as benzocyclobutene (BCB) resins with dibenzo eight-membered carbocycles proved to be responsible for the enhancement of thermal stability, low dielectric constants, low thermal expansion, and mechanical strength of the materials. 19,20 Interestingly, in 2013, we found that polyarylamides cross-linked by dibenzocyclooctadiene (DBCOD) exhibited large thermal contraction behavior. 21 Such unusual property was attributed to the reversible conformational changes from twist-boat to chair in DBCOD subunits.…”

Section: ■ Introductionmentioning

confidence: 99%

Significant Influence of Alkyl Substituents in the Alicyclic Rigid Backbone on Solubility and Thermal Stability of Polyarylamide Copolymers

Jin

Sun

Feng

et al. 2021

ACS Appl. Polym. Mater.

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Incorporation of alicyclic structural units in a polymer backbone holds great promises for preparing polyarylamides with superior physical properties (solubility, optical transparency, thermal stability, etc.). In this study, the alicyclic-containing building block, tetraethyl-substituted dibenzocyclooctadiene (TE-DBCOD), was integrated into the backbone of polyarylamides through a unique diamine monomer, TE-DBCOD-NH 2 . The TE-DBCOD-containing polyarylamides were synthesized first through polycondensation with different contents of TE-DBCOD units. Compared to the control polymers without DBCOD or ethyl side-chain units, the polyarylamides with TE-DBCOD units showed better solubility in less polar solvents (m-cresol, pyridine, and tetrahydrofuran) and higher glass transition temperature (T g ), which provides an opportunity to fabricate polyarylamides with both improved solubility and T g . Meanwhile, we also prepared the poly(amide-imide)s with TE-DBCOD by a two-step method for comparison. In contrast, the aromatic poly(amide-imide)s showed better solubility and lower T g s than the corresponding aromatic poly(amide-imide)s without TE-DBCOD contents, which revealed the complex influence of structure parameters on different polymers. Additionally, the synthesized polymers possessed high thermal stability (5% weight loss temperature > 440 °C) verified by thermogravimetric analysis. The strategy of introducing short side chains in polymer backbones opens a window for exploration of polymers with improved solubility and increased T g simultaneously, which also facilitates the understanding of the structure−property relationship of polymers with alicyclic structural units.

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“…Xu and Song demonstrated the thermal responsiveness of a polyhedral oligomeric silsesquioxane‐polylactides (POSS‐PLA) polyurethane network which recovers to its permanent configuration at 73 °C in 1 s . Huang et al also reported that cross‐linked benzocyclobutene resin with m ‐carborane cages and a siloxane backbone produces a heat‐responsive SMP that recovers more than 98% with recovery duration of not more than 20 s at a transition temperature of 75 °C . However, these systems may pose problems for in vivo applications due to the high T trans required to trigger shape recovery.…”

Section: Introductionmentioning

confidence: 99%

Engineering Porous Water‐Responsive Poly(PEG/PCL/PDMS Urethane) Shape Memory Polymers

Ang

Chan

Kai

et al. 2017

Macro Materials & Eng

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Porous and bulk water‐responsive urethane‐based shape memory polymers (SMPs) containing poly(ethylene glycol) (PEG), poly(caprolactone), and poly(dimethylsiloxane) are fabricated. The copolymers are processed by electrospinning to achieve porous structures. Shape fixation and recovery are achieved via the solvation and recrystallization of the hydrophilic PEG switching segment. Mechanical testing is performed to determine the SMP functionality. Water uptake rate for porous SMP is found to be higher than bulk SMP partly due to higher surface area for water contact. This enables porous structure water‐responsive SMPs to recover faster compared to bulk SMPs. The water‐responsive SMP exhibits good extents of shape fixity and shape recovery when immersed in water (≈35 °C). Different actuation times can be achieved based on the total surface area and efficiency of water‐entry into the polymer.

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Benzocyclobutene resin with m-carborane cages and a siloxane backbone: a novel thermosetting material with high thermal stability and shape-memory property

Abstract: A simple and effective way to synthesize carborane-containing benzocyclobutene resin with excellent performances.

Cited by 17 publications

References 43 publications

Redox-Active Metallacarborane-Decorated Octasilsesquioxanes. Electrochemical and Thermal Properties

Redox-Active Metallacarborane-Decorated Octasilsesquioxanes. Electrochemical and Thermal Properties

Significant Influence of Alkyl Substituents in the Alicyclic Rigid Backbone on Solubility and Thermal Stability of Polyarylamide Copolymers

Engineering Porous Water‐Responsive Poly(PEG/PCL/PDMS Urethane) Shape Memory Polymers

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