Abstract
Two series of epoxy resins modified with trifluoromethyl-containing poly(amic acid)s and polyimides, respectively, were prepared. The effects of trifluoromethyl group and imide unit on the properties of epoxy resins were investigated. The epoxy resins modified with poly(amic acid)s exhibited better performance because poly(amic acid)s serve as amine curing agent in epoxy resins and form chemical bond with epoxy matrix, thus having higher miscibility with epoxy resin than the epoxy resins modified with polyimides. The glass transition temperatures of the modified epoxy resins were in the range of 88.9–168.2 °C. Compared with unmodified epoxy resin, the modified epoxy resins exhibited better thermal stability with char yield at 800 °C ranging from 18 to 55 %, lower hydrophilicity with water absorption in the range of 0.47–0.95 %, and water contact angle of 94.9–105.0°. The introduction of trifluoromethyl group decreases the surface free energy and hydrophilicity of the modified epoxy resins. The SEM images of the fracture surfaces of the modified epoxy resins showed tough fracture features, indicating the enhancement of toughness of these resins in which imide unit had been introduced.
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References
Goodman SH (1998) Handbook of thermoset plastics. Park Ridge, New Jersey
May CA, Tanaka Y (1988) Epoxy resins: chemistry and technology. Marcel Dekker, New York
Jin FL, Li X, Park SJ (2015) Synthesis and application of epoxy resins: a review. J Ind Eng Chem 29:1–11
Jeon HR, Park JH, Shon MY (2013) Corrosion protection by epoxy coating containing multi-walled carbon nanotubes. J Ind Eng Chem 19:849–853
Ozturk A, Kaynak C, Tincer T (2001) Effects of liquid rubber modification on the behaviour of epoxy resin. Eur Polym J 37:2353–2363
Grubbs RB, Dean JM, Broz ME, Bates FS (2000) Reactive block copolymers for modification of thermosetting epoxy resins. Macromolecules 33:9522–9534
Kaynak C, Sipahi-Saglama E, Akovali G (2001) A fractographic study on toughening of epoxy resin using ground tyre rubber. Polymer 42:4393–4399
Chikhi N, Fellahi S, Bakar M (2002) Modification of epoxy resin using reactive liquid (ATBN) rubber. Eur Polym J 38:251–264
Zeng M, Sun X, Xiao H, Ji G, Jiang X, Wang B, Qi C (2008) Investigation of free volume and the interfacial, and toughening behavior for epoxy resin/rubber composites by positron annihilation. Radiat Phys Chem 77:245–251
Tang LC, Zhang H, Sprenger S, Ye L, Zhang Z (2012) Fracture mechanisms of epoxy-based ternary composites filled with rigid-soft particles. Compos Sci Technol 72:558–565
Kinloch AJ, Mohammed RD, Taylor AC (2005) The effect of silica nano particles and rubber particles on the toughness of multiphase thermosetting epoxy polymers. J Mater Sci 40:5083–5086. doi:10.1007/s10853-0051716
Yang L, Zhang C, Pilla S, Gong S (2008) Polybenzoxazine-core shell rubber–carbon nanotube nanocomposites. Composites Part A 39:1653–1659
Liang YL, Pearson RA (2010) The toughening mechanism in hybrid epoxy–silica–rubber nanocomposites (HESRNs). Polymer 51:4880–4890
Gómez-del Río T, Rodríguez J, Pearson RA (2014) Compressive properties of nanoparticle modified epoxy resin at different strain rates. Composites Part B 57:173–179
Hodgkin JH, Simon GP, Varley RJ (1998) Thermoplastic toughening of epoxy resins: a critical review. Polym Adv Technol 9:3–10
Pearson RA, Yee AF (1993) Toughening mechanisms in thermoplastic-modified epoxies: 1. Modification using poly(phenylene oxide). Polymer 34:3658–3670
Mimura K, Ito H, Fujioka H (2000) Improvement of thermal and mechanical properties by control of morphologies in PES-modified epoxy resins. Polymer 41:4451–4459
Jones AR, Watkins CA, White SR, Sottos NR (2015) Self-healing thermoplastic-toughened epoxy. Polymer 74:254–261
Ghosh M (1996) Polyimides: fundamentals and applications. Marcel Dekker, New York
Liaw DJ, Wang KL, Huang YC, Lee KR, Lai JY, Ha CS (2012) Advanced polyimide materials: syntheses, physical properties and applications. Prog Polym Sci 37:907–974
Li H, Liu J, Wang K, Fan L, Yang S (2006) Synthesis and characterization of novel fluorinated polyimides derived from 4, 4′-[2, 2, 2-trifluoro-1-(3, 5-ditrifluoromethylphenyl)ethylidene]diphthalic anhydride and aromatic diamines. Polymer 47:1443–1450
Woo Y, Oh SY, Kang YS, Jung B (2003) Synthesis and characterization of sulfonated polyimide membranes for direct methanol fuel cell. J Membr Sci 220:31–45
Fang J, Kita H, Okamoto KI (2000) Hyperbranched polyimides for gas separation applications. 1. Synthesis and characterization. Macromolecules 33:4639–4646
Hay JN, Woodfine B, Davies M (1996) Toughening of epoxy resins by polyimides synthesized from bisanilines. High Perform Polym 8:35–56
Ilijima T, Hamakawa S, Tomoi M (2001) Preparation of novel soluble poly(ester imide)s containing a trimellitimide moiety and their use as modifiers for aromatic diamine-cured epoxy resin. Polym Int 50:1214–1222
Akhter T, Siddiqi HM, Akhter Z, Butt MS (2011) Synthesis and characterization of some polyimide-epoxy composites. E-Polymers 11:244–256
Agag T, Takeichi T (1999) Synthesis and characterization of epoxy film cured with reactive polyimide. Polymer 40:6557–6563
Biolley N, Pascal T, Sillion B (1994) Polyimide-modified epoxy resin: time-temperature-transformation diagrams, mechanical and thermal properties. Polymer 35:558–564
Qiu Z, Wang J, Zhang Q, Zhang S, Ding M, Gao L (2006) Synthesis and properties of soluble polyimides based on isomeric ditrifluoromethyl substituted 1,4-bis(4-aminophenoxy)benzene. Polymer 47:8444–8452
Thünemann AF, Lieske A, Paulke BP (1999) Low surface energy coatings from waterborne nano-dispersions of polymer complexes. Adv Mater 11:321–324
Hougham G, Tesoro G, Shaw J (1994) Synthesis and properties of highly fluorinated polyimides. Macromolecules 27:3642–3649
Lin SH, Li F, Cheng SZD, Harris FW (1998) Organo-soluble polyimides: synthesis and polymerization of 2,2′-bis(trifluoromethyl)-4,4′,5,5′-biphenyl tetracarboxylic dianhydride. Macromolecules 31:2080–2086
Yang CP, Chen RS, Chen KH (2003) Light-colored and soluble fluorinated polyimides based on 2-trifluoromethyl-4,4′-diaminodiphenyl ether and various aromatic dianhydrides. Colloid Polym Sci 281:505–515
Li H, Liu J, Wang K, Fan L, Yang S (2006) Synthesis and characterization of novel fluorinated polyimides derived from 4,4′-[2,2,2-trifluoro-1- (3,5-ditrifluoromethylphenyl)ethylidene]diphthalic anhydride and aromatic diamines. Polymer 47:1443–1450
Urano Y, Chen N, Nakano K, Maeda K, Ando S (2008) Thermally stable multi-mode polymer optical waveguide fabricated by single-step photo-patterning of fluorinated polyimide/epoxy hybrids. In: Conference on organic photonic materials and devices X, 2008
Chen F, Sun T, Song H, Meng K, Han CC (2008) Layered structure formation in the reaction-induced phase separation of epoxy/polyimide blends. Macromolecules 41:7469–7477
Gopala A, Wu H, Heiden P (1998) Investigation of readily processable thermoplastic-toughened thermosets. III. Toughening BMIs and epoxy with a comb-shaped imide oligomer. J Appl Polym Sci 70:943–951
Bakar M, Okulska-Bożek M, Zygmunt M (2011) Effect of poly(amic acid) and polyimide on the adhesive strength and fracture toughness of epoxy resin. Mater Sci 47:355–362
Yeganeh H, Mehdipour-Ataei S, Ghaffari M (2008) Preparation and properties of novel poly(urethane-imide)s via blending of reactive polyimide and epoxy-terminated urethane prepolymers. High Perform Polym 20:126–145
Ashcroft WR (1993) Chemistry and technology of epoxy resins. In: Ellis B (ed) Curing agents for epoxy resins. Springer, Glasgow, pp 37–71
Wang JY, Yang SY, Huang YL, Tien HW, Chin WK, Ma CCM, Shu WJ (2012) Synthesis and properties of trifluoromethyl groups containing epoxy resins cured with amine for low D k materials. J Appl Polym Sci 124:2615–2624
Matsumoto A, Kimura T (1998) Synthesis of heat- and solvent-resistant polymers by radical polymerization of trifluoromethyl-substituted N-phenylmaleimides. J Appl Polym Sci 68:1703–1708
Krishnan PSG, Vora RH, Chung TS (2001) Synthesis, characterization and kinetic study of hydrolysis of polyamic acid derived from ODPA and m-tolidine and related compounds. Polymer 42:5165–5174
Chang JH, Park KM, Lee IC (2000) Thermal cyclodehydration of aromatic precursor polymers to polybenzoxazole and polyimide; their thermal and mechanical properties. Polym Bull 44:63–69
Naito K, Onta M, Kogo Y (2012) The effect of adhesive thickness on tensile and shear strength of polyimide adhesive. Int J Adhes Adhes 36:77–85
Glaris P, Coulon JF, Dorget M, Poncin-Epaillard F (2014) Fluorinated epoxy resin as a low adhesive mould for composite material. Composites Part B 63:94–100
Miccio LA, Fasce DP, Schreiner WH, Montemartini PE, Oyanguren PA (2010) Influence of fluorinated acids bonding on surface properties of crosslinked epoxy-based polymers. Eur Polym J 46:744–753
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This work was financially supported by the National Natural Science Foundation of China (51003033) and the Fundamental Research Funds for the Central Universities, SCUT (Grant Number 2015ZM100).
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Que, X., Yan, Y., Qiu, Z. et al. Synthesis and characterization of trifluoromethyl-containing polyimide-modified epoxy resins. J Mater Sci 51, 10833–10848 (2016). https://doi.org/10.1007/s10853-016-0294-9
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DOI: https://doi.org/10.1007/s10853-016-0294-9