Abstract
The effects of four different curing atmospheres, i.e., static air, circulating air, nitrogen and vacuum, on the polymerization mechanism, chemical structure, hydrogen bonding, mechanical property, thermal property, water contact angle, etc., of the polybenzoxazine films were systematically studied. It was found that curing in air caused more oxidation and decomposition, generating more benzoquinones, carbonyl groups and iminium ions in the resultant polybenzoxazine films. Consequently, the films cured in air were less cross-linked, darker in color and more brittle. The films cured in static air (SA) showed tensile strength and elongation at break of 12.59 MPa and 2.16%, respectively, which were 61.24 MPa and 2.74% lower than those of the films cured in nitrogen (N2). Moreover, it was demonstrated that more intramolecular rigid –OH···N hydrogen bonding was formed in the films cured in air, which was believed to be the fundamental reason for the lower chemical cross-linking density and poorer toughness. Nevertheless, these films showed higher char yield due to the formation of more thermally stable groups in oxidation process. Further investigation on chemical structures, hydrogen bonding and water contact angles of the upper and lower surfaces of the films revealed that the upper surfaces were more inclined to be oxidized and decomposed during curing and more intramolecular hydrogen bonding (–OH···N HB) was formed on upper surfaces, which led to increased water contact angles.
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Ning X, Ishida H (1994) Phenolic materials via ring-opening polymerization: synthesis and characterization of Bisphenol A based benzoxazine and their polymers. J Polym Sci Part A Polym Chem 32(6):1121–1129
Ishida H, Krus CM (1998) Synthesis and characterization of structurally uniform model oligomers of polybenzoxazine. Macromolecules 31(8):2409–2418
Shen SB, Ishida H (1999) Dynamic mechanical and thermal characterization of high-performance polybenzoxazines. J Polym Sci Part B 37(23):3257–3268
Agag T, Jin L, Ishida H (2009) A new synthetic approach for difficult benzoxazines: preparation and polymerization of 4,4′-diaminodiphenyl sulfone-based benzoxazine monomer. Polymer 50(25):5940–5944
Dogan Demir K, Kiskan B, Yagci Y (2011) Thermally curable acetylene-containing main-chain benzoxazine polymers via sonogashira coupling reaction. Macromolecules 44(7):1801–1807.
Ran QC, Yi G (2015) Concerted reactions of aldehyde groups during polymerization of an aldehyde-functional benzoxazine. J Polym Sci Part A Polym Chem 49(7):1671–1677
Šebenik U, Krajnc M (2015) Synthesis, curing kinetics, thermal and mechanical behavior of novel cardanol-based benzoxazines. Polymer 76:203–212
Zhang S, Yang P, Bai Y, Zhou T, Zhu R, Gu Y (2017) Polybenzoxazines: thermal responsiveness of hydrogen bonds and application as latent curing agents for thermosetting resins. ACS Omega 2(4):1529–1534
Ghosh NN, Kiskan B, Yagci Y (2007) Polybenzoxazines—new high performance thermosetting resins: synthesis and properties. Prog Polym Sci 32(11):1344–1391
Nair CPR (2004) Advances in addition-cure phenolic resins. Prog Polym Sci 29(5):401–498
Kiskan B (2018) Adapting benzoxazine chemistry for unconventional applications. React Funct Polym 129:76–88
Chou CI, Liu YL (2010) High performance thermosets from a curable Diels–Alder polymer possessing benzoxazine groups in the main chain. J Polym Sci Part A Polym Chem 46(19):6509–6517
He X-Y, Wang J, Wang Y-D, Liu C-J, Liu W-B, Yang L (2013) Synthesis, thermal properties and curing kinetics of fluorene diamine-based benzoxazine containing ester groups. Eur Polym J 49(9):2759–2768
Dumas L, Bonnaud L, Olivier M, Poorteman M, Dubois P (2016) High performance bio-based benzoxazine networks from resorcinol and hydroquinone. Eur Polym J 75:486–494
Zhang K, Yu X (2018) Catalyst-free and low-temperature terpolymerization in a single-component benzoxazine resin containing both norbornene and acetylene functionalities. Macromolecules 51(16):6524–6533
Su YC, Chang FC (2003) Synthesis and characterization of fluorinated polybenzoxazine material with low dielectric constant. Polymer 44(26):7989–7996
Su Y-C, Chen W-C, Ou K-L, Chang F-C (2005) Study of the morphologies and dielectric constants of nanoporous materials derived from benzoxazine-terminated poly(ε-caprolactone)/polybenzoxazine co-polymers. Polymer 46(11):3758–3766
Lin CH, Huang SJ, Wang PJ, Lin HT, Dai SA (2012) Miscibility, microstructure, and thermal and dielectric properties of reactive blends of dicyanate ester and diamine-based benzoxazine. Macromolecules 45(18):7461–7466
Zhang S, Yan Y, Li X, Fan H, Ran Q, Fu Q, Gu Y (2018) A novel ultra low-k nanocomposites of benzoxazinyl modified polyhedral oligomeric silsesquioxane and cyanate ester. Eur Polym J 103:124–132
Kobzar YL, Tkachenko IM, Lobko EV, Shekera OV, Syrovets AP, Shevchenko VV (2017) Low dielectric material from novel core-fluorinated polybenzoxazine. Mendeleev Commun 27(1):41–43
Ilango K, Prabunathan P, Satheeshkumar E, Manohar P (2017) Design of low dielectric constant polybenzoxazine nanocomposite using mesoporous mullite. High Perform Polym 29(2):141–150
Rimdusit S, Lohwerathama M, Hemvichian K, Kasemsiri P, Dueramae I (2013) Shape memory polymers from benzoxazine-modified epoxy. Smart Mater Struct 22(7):075033
Zhang S, Ran Q, Fu Q, Gu Y (2018) Preparation of transparent and flexible shape memory polybenzoxazine film through chemical structure manipulation and hydrogen bonding control. Macromolecules 51(17):6561–6570
Taskin OS, Kiskan B, Yagci Y (2013) Polybenzoxazine precursors as self-healing agents for polysulfones. Macromolecules 46(22):8773–8778
Sharma P, Shukla S, Lochab B, Kumar D, Kumar Roy P (2014) Microencapsulated cardanol derived benzoxazines for self-healing applications. Mater Lett 133:266–268
Wan L, Wang J, Xie L, Sun Y, Li K (2014) Nitrogen-enriched hierarchically porous carbons prepared from polybenzoxazine for high-performance supercapacitors. ACS Appl Mater Interfaces 6(17):15583–15596
Alhwaige AA, Ishida H, Qutubuddin S (2016) Carbon aerogels with excellent CO2 adsorption capacity synthesized from clay-reinforced biobased chitosan-polybenzoxazine nanocomposites. ACS Sustain Chem Eng 4(3):1286–1295
Wu J-Y, Mohamed MG, Kuo S-W (2017) Directly synthesized nitrogen-doped microporous carbons from polybenzoxazine resins for carbon dioxide capture. Polym Chem 8(36):5481–5489
Wang C, Sun J, Liu X, Sudo A, Endo T (2012) Synthesis and copolymerization of fully bio-based benzoxazines from guaiacol, furfurylamine and stearylamine. Green Chem 14(10):2799–2806
Rao BS, Palanisamy A (2011) Monofunctional benzoxazine from cardanol for bio-composite applications. React Funct Polym 71(2):148–154
Lligadas G, Tüzün A, Ronda JC, Galià M, Cádiz V (2014) Polybenzoxazines: new players in the bio-based polymer arena. Polym Chem 5(23):6636–6644
Zhang K, Han M, Liu Y, Froimowicz P (2019) Design and synthesis of bio-based high-performance trioxazine benzoxazine resin via natural renewable resources. ACS Sustain Chem Eng 7(10):9399–9407
Zhang L, Yang Y, Chen Y, Lu H (2017) Cardanol-capped main-chain benzoxazine oligomers for resin transfer molding. Eur Polym J 93:284–293
Plengudomkit R, Okhawilai M, Rimdusit S (2016) Highly filled graphene-benzoxazine composites as bipolar plates in fuel cell applications. Polym Compos 37(6):1715–1727
Patil DM, Phalak GA, Mhaske S (2017) Enhancement of anti-corrosive performances of cardanol based amine functional benzoxazine resin by copolymerizing with epoxy resins. Prog Org Coat 105:18–28
Renaud A, Poorteman M, Escobar J, Dumas L, Bonnaud L, Dubois P, Olivier M-G (2017) A new corrosion protection approach for aeronautical applications combining a Phenol-paraPhenyleneDiAmine benzoxazine resin applied on sulfo-tartaric anodized aluminum. Prog Org Coat 112:278–287
Wang YX, Ishida H (1999) Cationic ring-opening polymerization of benzoxazines. Polymer 40(16):4563–4570
Chutayothin P, Ishida H (2010) Cationic ring-opening polymerization of 1,3-benzoxazines: mechanistic study using model compounds. Macromolecules 43(10):4562–4572
Wang YX, Ishida H (2000) Synthesis and properties of new thermoplastic polymers from substituted 3,4-dihydro-2h-1,3-benzoxazines. Macromolecules 33(8):2839–2847
Wang MW, Jeng RJ, Lin CH (2015) Study on the ring-opening polymerization of benzoxazine through multisubstituted polybenzoxazine precursors. Macromolecules 48(3):530–535
Ishida H, Sanders DP (2000a) Regioselectivity and network structure of difunctional alkyl-substituted aromatic amine-based polybenzoxazines. Macromolecules 33(22):8149–8157
Sudo A, Kudoh R, Nakayama H, Arima K, Endo T (2008) Selective formation of poly(N, O-acetal) by polymerization of 1,3-benzoxazine and its main chain rearrangement. Macromolecules 41(23):9030–9034
Ran Q-C, Zhang D-X, Zhu R-Q, Gu Y (2012a) The structural transformation during polymerization of benzoxazine/FeCl3 and the effect on the thermal stability. Polymer 53(19):4119–4127
Chao L, Shen D, SebastiáN RMA, Marquet J, SchöNfeld R (2011) Mechanistic studies on ring-opening polymerization of benzoxazines: a mechanistically based catalyst design. Macromolecules 44(12):4616–4622
Zhang S, Ran Q, Fu Q, Gu Y (2019a) Controlled polymerization of 3,4-dihydro-2H-1,3-benzoxazine and its properties tailored by Lewis acids. React Funct Polym 139:75–84
Zhang S, Ran Q, Fu Q, Gu Y (2019b) Thermal responsiveness of hydrogen bonding and dielectric property of polybenzoxazines with different Mannich bridge structures. Polymer 175:302–309
Han L, Salum ML, Zhang K, Froimowicz P, Ishida H (2017) Intrinsic self‐initiating thermal ring‐opening polymerization of 1,3‐benzoxazines without the influence of impurities using very high purity crystals. J Polym Sci Part A Polym Chem 55(20):3434–3445
Macko J, Ishida H (2000) Behavior of a bisphenol-A-based polybenzoxazine exposed to ultraviolet radiation. J Polym Sci Part B Polym Phys 38:2687–2701
Ishida H, Hong YL (1997) A study on the volumetric expansion of benzoxazine-based phenolic resin. Macromolecules 30(4):1099–1106
Kim H-D, Ishida H (2002) A study on hydrogen-bonded network structure of polybenzoxazines. J Phys Chem A 106(14):3271–3280
Yang P, Wang X, Fan H, Gu Y (2013) Effect of hydrogen bonds on the modulus of bulk polybenzoxazines in the glassy state. Phys Chem Chem Phys 15(37):15333–15338
Wirasate S, Dhumrongvaraporn S, Allen DJ, Ishida H (2015) Molecular origin of unusual physical and mechanical properties in novel phenolic materials based on benzoxazine chemistry. J Appl Polym Sci 70(7):1299–1306
Bai Y, Yang P, Song Y, Zhu R, Gu Y (2016) Effect of hydrogen bonds on the polymerization of benzoxazines: influence and control. RSC Adv 6(51):45630–45635
Wang B, Yang P, Li Y, He Y, Zhu R, Gu Y (2017) Blends of polybenzoxazine/poly (acrylic acid): hydrogen bonds and enhanced performances. Polym Int 66:1159–1163
Su Y-C, Kuo S-W, Yei D-R, Xu H, Chang F-C (2003) Thermal properties and hydrogen bonding in polymer blend of polybenzoxazine/poly (N-vinyl-2-pyrrolidone). Polymer 44(8):2187–2191
Li X, Yi G (2011) The co-curing process of a benzoxazine-cyanate system and the thermal properties of the copolymers. Polym Chem 2(12):2778–2781
Zhuang Y, Gu Y (2013) Poly(benzoxazole-amide-imide) copolymers for interlevel dielectrics: interchain hydrogen bonding, molecular arrangement and properties. J Polym Res 20(6):1–8
Wang X, Zong L, Han J, Wang J, Liu C, Jian X (2017) Toughening and reinforcing of benzoxazine resins using a new hyperbranched polyether epoxy as a non-phase-separation modifier. Polymer 121:217–227
Liu Y, Gao S, Gong X, Xue Q, Lu Z (2019) Benzoxazine-epoxy thermosets with smectic phase structures for high thermal conductive materials. Liquid Cryst 46:1–10
Zeng K, Huang J, Ren J, Ran Q (2019) Curing reaction of benzoxazine under high pressure and the effect on thermal resistance of polybenzoxazine. Macromol Chem Phys 220(1):1800340
Ran Q-C, Zhang D-X, Zhu R-Q, Gu Y (2012b) The structural transformation during polymerization of benzoxazine/FeCl 3 and the effect on the thermal stability. Polymer 53(19):4119–4127
Liu Y, Wang R, An Q, Su X, Li C, Shen S, Huo G (2017) The F··· H hydrogen bonding effect on the dynamic mechanical and shape-memory properties of a fluorine-containing polybenzoxazine. Macromol Chem Phys 218(15):1700079
Lin CH, Chang SL, Shen TY, Shih YS, Lin HT, Wang CF (2012) Flexible polybenzoxazine thermosets with high glass transition temperatures and low surface free energies. Polym Chem 3(4):935–945
Treloar RGL (1958) The physics of rubber elasticity. 2nd ed, The Clarendon Press
Ishida H, Allen DJ (1996) Mechanical characterization of copolymers based on benzoxazine and epoxy. Polymer 37(20):4487–4495
Ishida H, Sanders DP (2000b) Improved thermal and mechanical properties of polybenzoxazines based on alkyl-substituted aromatic amines. J Polym Sci Part B Polym Phys 38(24):3289–3301
Laobuthee A, Chirachanchai S, Ishida H, Tashiro K (2001) Asymmetric mono-oxazine: an inevitable product from Mannich reaction of benzoxazine dimers. J Am Chem Soc 123(41):9947–9955
Chirachanchai S, Laobuthee A, Phongtamrug S (2009) Self termination of ring opening reaction of p-substituted phenol-based benzoxazines: an obstructive effect via intramolecular hydrogen bond. J Heterocycl Chem 46(4):714–721
Bai Y, Yang P, Wang T, Gu Y (2017) Hydrogen bonds in the blends of polybenzoxazines and N, N′-(pyridine-2, 6-diyl) diacetamide: Inter-or intra-molecular hydrogen bonds? J Mol Struct 1147:26–32
Alhwaige AA, Ishida H, Qutubuddin S (2019) Poly(benzoxazine-f-chitosan) films: the role of aldehyde neighboring groups on chemical interaction of benzoxazine precursors with chitosan. Carbohydr Polym 209:122–129
Chih-Feng W, Yi-Ting W, Pao-Hsiang T, Shiao-Wei K, Chun-Hung L, Yuung-Ching S, Feng-Chih C (2006) Stable superhydrophobic polybenzoxazine surfaces over a wide pH range. Langmuir ACS J Surf Colloids 22(20):8289–8292
Chih-Feng W, Yi-Che S, Shiao-Wie K, Chih-Feng H, Yuung-Ching S, Feng-Chih C (2010) Low-surface-free-energy materials based on polybenzoxazines. Angew Chem Int Ed 45(14):2248–2251
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This work is supported by the National Natural Science Foundation of China (Project no. 21104048).
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Zhang, S., Ran, Q., Zhang, X. et al. Effects of the curing atmosphere on the structures and properties of polybenzoxazine films. J Mater Sci 56, 2748–2762 (2021). https://doi.org/10.1007/s10853-020-05425-5
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DOI: https://doi.org/10.1007/s10853-020-05425-5