Preparation and properties of novel hybrid resins based on acetylene‐functional benzoxazine and polyvinylsilazane

Li, Guangzhu; Luo, Zhenhua; Han, Wei; Luo, Yongming; Xu, Caihong; Zhao, Tong

doi:10.1002/app.39642

Cited by 13 publications

(12 citation statements)

References 25 publications

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“…But for the hybrid benzoxazine (BS‐X), the only exothermic peak temperature of BS‐X was decreased with the increase of silazane. The exothermic peak temperature of BS‐150 is near 180°C; Obviously, it is lower than the exothermic peak temperature of oligosiloxanes modified allyl containing benzoxazine, 14 polyvinylsilazane, 32 or POSS 33 modified benzoxazine.…”

Section: Resultsmentioning

confidence: 86%

Hybrids from silazane and allyl‐containing benzoxazine for low‐curing temperature and high‐flame retardance

Zhang

Zhong

et al. 2021

J of Applied Polymer Sci

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Silicon hybrid benzoxazine has good flame retardance, but generally these hybrid polymer' curing temperature is higher than 220°C, limiting its application in the field of electronics. In this study, under Nickel acetylacetonate catalyzed, a new hybrid benzoxazine was synthesized using the copolymerization of polysilazane and allyl containing benzoxazine. Differential scanning calorimeter (DSC) and Fourier transform infrared spectroscopy (FTIR) studied the curing behavior of this hybrid benzoxazine. The results of DSC and FTIR indicated that the curing temperature of this hybrid benzoxazine can decrease from 269 to 182°C, the main reaction with this hybrid benzoxazine is amine‐catalyzed oxazine ring‐ opening and the hydrosilylation reaction. The thermal stability of hybrid benzoxazine after cured was studied by a thermogravimetric analyzer. The results of thermogravimetric experiments demonstrated that this hybrid benzoxazine's char yield can increase from 25.57% to 66.11% (159% increase). The flame retardancy of glass fiber reinforced hybrid benzoxazine was studied by the UL‐94 flame test. The glass fiber reinforced hybrid benzoxazine composite show a V‐0 result in the UL‐94 test. This work provides a new hybrid benzoxazine with low‐curing temperature, ultrahigh char yield, and great flame retardance.

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Section: Resultsmentioning

confidence: 86%

Hybrids from silazane and allyl‐containing benzoxazine for low‐curing temperature and high‐flame retardance

Zhang

Zhong

et al. 2021

J of Applied Polymer Sci

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“…Moreover, compared with AB, the initial curing temperature and peak temperature of ASB were, respectively, decreased from 169 • C to 146 • C and from 198 • C to 180 • C at the 5 • C/min heating rate. As we know, many research studies have proven that acetenyl had a catalytic effect on the ring-opening polymerization of benzoxazine [25]. The DSC results indicated that siloxane might also have a catalytic effect on the polymerization of either benzoxazine or acetenyl, or maybe both.…”

Section: Dsc Analysismentioning

confidence: 98%

“…As we know, the introduction of PHS led to a lower cross-linking density, which would decrease the tensile and flexural strength. This might be a result of an intermolecular Ar-O-Si-O-Ar group that was generated from the reaction between -Si-CH 3 and the phenolic hydroxyl group derived from the ring-opening polymerization of benzoxazine [25].…”

Section: Mechanical Property Analysismentioning

confidence: 99%

A Novel Acetylene-Functional/Silicon-Containing Benzoxazine Resin: Preparation, Curing Kinetics and Thermal Properties

et al. 2020

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Benzoxazine resin has been paid more attention in the fields of aviation, electronics, automobiles and new energy industries because of its excellent comprehensive performance. Further application is limited, however, by shortcomings such as high brittleness and high curing temperature. Furthermore, higher thermal stability is imperiously demanded in special areas. Incorporating both an acetylene group and silicon into the benzoxazine monomer is a promising possible solution to improve the curing processability, thermal properties and toughness of benzoxazine. In this paper, an acetylene-functional/silicon-containing benzoxazine monomer was prepared by two-step synthesis, and acetylene-functional benzoxazine was also prepared as a comparison. FTIR and 1H NMR confirmed the molecular structure of acetylene-functional/silicon-containing benzoxazine. Differential scanning calorimetry (DSC) analysis showed that the initial and peak degradation temperatures of acetylene-functional/silicon-containing benzoxazine were decreased by 21 °C and 18 °C compared with acetylene-functional benzoxazine, respectively. The apparent activation energy of the curing reaction of acetylene-functional/silicon-containing benzoxazine was 83.1 kJ/mol, which was slightly lower than acetylene-functional benzoxazine (84.7 kJ/mol). TGA results showed that the acetylene-functional/silicon-containing benzoxazine had a higher thermal stability than acetylene-functional benzoxazine. The temperatures of 5% weight loss of acetylene-functional/silicon-containing benzoxazine were 380 °C in nitrogen and 485 °C in air, and the char yield at 1000 °C was 80% in nitrogen and 21% in air, respectively. The results of mechanical properties showed that the impact strength of acetylene-functional/silicon-containing benzoxazine was higher than acetylene-functional benzoxazine by 35.4%. The tensile and flexural strengths of acetylene-functional/silicon-containing benzoxazine were slightly higher than that of acetylene-functional benzoxazine.

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“…This finding is in agreement with other studies of PSZ-comprised resins. 26,27 High-temperature thermomechanical property of thermally cured calixarene cyanate ester is revealed in Figure 11, T g (represented by onset temperature of storage modulus profile, especially when the resin is applied for engineering material) of calixarene cyanate ester cured together with 10% PSZ was around 338 C, much higher than that of conventional BPACE (T g at 226 C), indicating that calixarene cyanate ester is a promising lightweight thermoresistant cyanate ester resin. The processing capability of calixarene cyanate ester and the mechanical property of composite material using calixarene cyanate ester as matrix are under investigation.…”

Section: Thermal Cure Of P-tert-butylcalix[4]arene Cyanate Ester With Various Curing Acceleratorsmentioning

confidence: 99%

Calixarene–based cyanate ester resin for high-temperature material

Chen

Wang

et al. 2018

High Performance Polymers

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p-tert-Butylcalix[4]arene-derived cyanate ester resins, both single and binary systems, were synthesized and studied for their thermal properties. The results showed that pure calixarene cyanate ester can be thermally cured at comparatively high temperature, which remains in original powder state after thermally cured. So the pure calixarene cyanate ester resin fails to meet the processing demands of resin-matrixed composite. In this work, p-tert-butylcalix[4]arene cyanate ester was chemically functionalized to have highly decreased thermal cure temperature (by copolymerization with epoxy, bisphenol A cyanate ester (BPACE), and polysilazane (PSZ), respectively). The binary resins were thermally cured into monolithic materials. The optimal acceleration of thermal cure reaction was achieved with an addition of 10% PSZ. The addition of epoxy resin decreased thermal resistance and carbon yield of p-tert-butylcalix[4]arene cyanate ester and addition of BPACE slightly decreased thermal resistance and carbon yield, while PSZ highly improved thermal resistance and carbon yield. Glass transition temperature of the co-cured resin of calixarene cyanate ester with 10% PSZ was much higher than that of conventional BPACE. Calixarene cyanate ester possesses much better property than that of conventional BPACE resin.

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Preparation and properties of novel hybrid resins based on acetylene‐functional benzoxazine and polyvinylsilazane

Cited by 13 publications

References 25 publications

Hybrids from silazane and allyl‐containing benzoxazine for low‐curing temperature and high‐flame retardance

Hybrids from silazane and allyl‐containing benzoxazine for low‐curing temperature and high‐flame retardance

A Novel Acetylene-Functional/Silicon-Containing Benzoxazine Resin: Preparation, Curing Kinetics and Thermal Properties

Calixarene–based cyanate ester resin for high-temperature material

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