Results 101 to 110 of about 10,104 (267)

Self-curable Benzoxazine-Contianing Epoxy Resins

, 2014
本實驗先利用三步法合成4-(2H-benzo[1,3]oxazin-3-yl) benzoic acid (3)，藉由FTIR及NMR鑑定其結構正確。再和Cresol Novolac Epoxy (CNE)與Diglycidyl Ether of Bisphenol A (DGEBA)反應，合成帶有Benzoxazine的環氧樹脂(4)/(5)。利用環氧當量(EEW)滴定及NMR追蹤反應，確定其反應完全，並得正確的EEW值；FTIR及NMR鑑定其結構，證明反應結束其Benzoxazine依然存在 ...
張明華, Chang, Ming-Hua
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Synthesis and characterization of a novel bisphthalonitrile containing benzoxazine

eXPRESS Polymer Letters, 2007
The novel bisphthalonitrile containing benzoxazine (BPNBZ) has been synthesized using bisphenol-A, 4-aminophenoxylphthalonitrile and paraformaldehyde.
doaj   +1 more source

Crystal structure and C—H...F hydrogen bonding in the fluorinated bis-benzoxazine: 3,3′-(ethane-1,2-diyl)bis(6-fluoro-3,4-dihydro-2H-1,3-benzoxazine)

Acta Crystallographica Section E: Crystallographic Communications, 2016
The title fluorinated bisbenzoxazine, C18H18F2N2O2, crystallizes with one half-molecule in the asymmetric unit, which is completed by inversion symmetry. The fused oxazine ring adopts an approximately half-chair conformation.
Augusto Rivera, Jicli José Rojas, Jaime Ríos-Motta, Michael Bolte   +3 more
doaj   +1 more source

Studies on Benzoxazine Derivaties

International Journal for Research in Applied Science and Engineering Technology
Abstract: The 5, 6, 7 trimethoxy (1, 4) benzoxazine -2,3diones was synthesized by reaction of 2-amino-3,4,5 trimethoxyphenol with oxalyl chloride. The new compound of benzoxazine derivative was characterized by elemental analysis, mass spectroscopy , infrared and 1H-NMR . The compound exhibited antifungal and antibacterial activities.
openaire   +1 more source

Self-foaming diphenolic acid benzoxazine

Polymer, 2012
10.1016/j.polymer.2012.05.044 This work concerns the investigation of porous polybenzoxazines based on the non-toxic renewable diphenolic acid. The approach described relies on the in situ generation of foaming agent (CO2) during the thermal curing.
Zuñiga, C., Lligadas, G., Ronda, J.C., Galià, M., Cádiz, V.   +4 more
openaire   +2 more sources

Biobased Benzoxazine Derived from Daidzein and Furfurylamine: Microwave-Assisted Synthesis and Thermal Properties Investigation

, 2018
A biobased benzoxazine resin (Dz-f) demonstrating excellent thermal properties was synthesized from daidzein and furfurylamine by using a microwave heating method.
Zhu, Jin, Peng, Yunyan, Liu, Yuan, Cao, Lijun, Dai, Jinyue, Teng, Na, Liu, Xiaoqing   +6 more
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Direct synthesis of poly(benzoxazine imide) from an ortho-benzoxazine: its thermal conversion to highly cross-linked polybenzoxazole and blending with poly(4-vinylphenol)

, 2018
A facile one-pot synthesis of a poly(benzoxazine imide), NDOPoda Bz, was prepared without the need for either the preparation of an amino-functionalized benzoxazine or subsequent thermal treatment.
Shiao-Wei Kuo, Ahmed F. M. El-Mahdy
core   +1 more source

Benzoxazine Formation Mechanism Evaluation by Direct Observation of Reaction Intermediates

, 2019
Benzoxazine formation is a fundamental step in the preparation of polybenzoxazine resins, and a detailed description of the mechanism governing the formation of benzoxazine and side products is vital for improving the properties and performance of these ...
Thiago C. Correra, André F. Rodrigues-Oliveira (4348951), André F. Rodrigues-Oliveira, Francisco W. M. Ribeiro (7378934), Thiago C. Correra (7378937), Francisco W. M. Ribeiro   +5 more
core   +1 more source

Structure, thermal and fracture mechanical properties of benzoxazine-modified amine-cured DGEBA epoxy resins

eXPRESS Polymer Letters, 2011
First, traditional diamine hardeners of epoxy resins (EP) were checked as potential accelerators for the benzoxazine (BOX) homopolymerization. It was established that the acceleration effect depends on both the type and amount of the diamine compounds ...
doaj   +1 more source

Photo-sensitive benzoxazine II: chalcone-containing benzoxazine and its photo and thermal-cured thermoset

, 2017
Chalcone-containing benzoxazine (BHP-a) was synthesized. Two procedures were applied to cure BHP-a, thermal curing of chalcone and oxazine moieties. Another one was photo curing the chalcone moiety, followed by thermal curing of the oxazine moiety.
Tzong Yuan Juang, Ching Hsuan Lin, Chun Kai Chien, Chien Han Chen   +3 more
core   +1 more source