Thermally curable main-chain benzoxazine prepolymers via polycondensation route

Triphenylbenzene core based dendritic benzoxazines and their heat-resistant and photoluminescent polymers

“…The peaks at 0.0-3.0 ppm were assigned to the protons of the n-propyl and cyclohexyl, respectively. Figure 3 showed the 13 Figure 4 showed the FTIR spectra of TP-pa, TP-ca, and TP-ab. The characteristic absorptions due to benzoxazine structure were observed at 939-944 cm À1 (out-of-plane C-H vibration of the benzene ring), 1228-1232 cm À1 , and 1030-1040 cm À1 (asymmetric and symmetric stretching of C-O-C), 1327-1340 cm À1 (CH 2 wagging), and 1498-1600 cm À1 (stretching of asymmetric trisubstituted benzene ring), which were in accordance with those of bifunctional benzoxazine (bisphenol-A/aniline type, B-a).…”

“…13 C NMR spectra of TP-pa, TP-ca, and TP-ab in CDCl 3 . 13 C NMR: carbon nuclear magnetic resonance; TP-pa: 1,3,5-tri(3-propyl-3,4-dihydro-2H-1,3-benzoxazin-6-yl)benzene; TP-ca: 1,3,5-tri(3-cyclohexyl-3,4-dihydro-2H-1,3-benzoxazin-6-yl)benzene; TP-ab: 1,3,5-tri(3-phenyl-3,4-dihydro-2H-1,3-benzoxazin-6-yl)benzene; CDCl 3 : deuterated chloroform.…”

Integrating plant oils into thermally curable main-chain benzoxazine polymers via ADMET polymerization

“…Thus, developing thermally curable polymeric precursors with benzoxazine units either as side chain [16] or as chain-end [17][18][19][20] or in main chain [21][22][23][24][25][26][27][28][29] some properties that are the combination of thermoplastic and thermosetting polymers such as processability, flexibility, high crosslinking density after cure, reductions in the vapor pressure during process and fragility for cured-structures are transferred to the cured resin. Although a wide range of polycondensation chemistries [30] such as polyester synthesis, hydrosilylation, Diels-Alder and [3+2] Huisgen type click reactions and Sonogashira coupling have been utilized to achieve this goal, to the best of our knowledge, there is no report on the synthesis of benzoxazine functionalized polymers via acyclic diene metathesis (ADMET) polymerization.…”

Thiol reactive polybenzoxazine precursors: A novel route to functional polymers by thiol-oxazine chemistry

“…These materials provide many important features for high performance polymer applications. Low water absorption, high modulus, high strength, high glass transition temperatures, high char yield, chemical resistance, flame retardancy, long shelf life and more importantly they have very limited volumetric change and non-acid catalytic polymerization upon curing [1][2][3][4]. Another important feature of polybenzoxazines is the simple synthesis of their monomers.…”