Abstract
Diglycidylether of bisphenol A (DGEBA)/poly(vinyl acetate) (PVAc) blends cured with 4,4′-diaminodiphenylmethane (DDM) were prepared. The miscibility and phase behavior were investigated by means of differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and scanning electron microscopy (SEM). The study results indicate that the epoxy precursor (DGEBA)/PVAc blends are clearly miscible at the entire composition and theTg values experimentally obtained are in a good agreement with those predicted by Fox equation. Cured at elevated temperature, all the DDM-cured blends underwent phase separation and display two-phase morphology. When PVAc content is more than 10 wt%, the thermoplastics-modified resins began to show a co-continuous phase structure. It is the cocontinuous structure that leads to a significantly-improved toughness inK ic. Morphologic investigation of the surfaces of fracture mechanic measurement specimens indicates that the toughening effect of the thermoplastics-modified epoxy resins may arise mainly from the ductile yielding of PVAc.
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References
May CA, Tanaka GY (eds) (1973) Epoxy Resin Chemistry and Technology Marcel Dekker, New York
Bauer RS (ed) (1979) Epoxy Resin Chemistry. Advances in Chemistry 114, Am Chem Soc Washington DC
Atkins KE (1978) In: Paul DR, Newman S (eds) Polymer Blends Vol 2, Academic Press, New York
Bucknall CB (1977) Toughened Plastics. Applied Science London
Sultanm JN, McGarry FJ (1973) Polym Eng Sci 13:29
Kunz SC, Sayre JA, Assink RA (1982) Polymer 23:1897
Sasidaran AP, Latha PB, Ramaswamy R (1990) J Appl Polym Sci 41:15
Yee AF, Pearson RA (1986) J Mater Sci 21:2462
Yorkgitis EM, Eiss NS, Tran Jr. C, Wilkes GL, McGrath JE (1985) Am Chem Soc Adv in Polym Sci 72:79
Riew CK, Rowe EH, Siebent AR (1976) Am Chem Soc, Adv Chem Ser 154:326
Meijerink JI, Eguchi S, Ogata M, Ishii T, Amagi S, Numata S, Sashima (1994) Polymer 35:179
Zheng S, Wang H, Dai Q, Luo X, Ma D, Wang K (1995) Makromol Chem 196:269
Kemp TJ, Wilford A, Howarth OW, Lee TCP (1992) Polymer 33:1860
Bussi P, Ishida H (1994) J Appl Polym Sci 32:647
Pearson RA, Yee AF (1986) Polymer 21:2475
MeGarry FJ (1970) Pro Roy Soc, London, A319:59
Diamont J, Moulton RJ (1984) 29th National SAMPE Symposium, California. p 422
Bucknall CB, Partridge IK (1983) Polymer 24:639
Bucknall CB, Gilbert AH (1989) Polymer 3:213
Raghava RS (1987) J Polym Sci Polym Phys Edn 25:1017
Cerere JA, McGrath JE (1986) Polym Prepr 27:299
Hourston DJ, Lane JM (1992) Polymer 33:1397
Hedrick JH, Yilgor I, Wilkens GL, McGrath JE (1985) Polym Bull 13:201
Hedrick JH, Yilgor I, Jurek M, Hedrick JC, Wilkens GL, McGrat JE (1991) Polymer 32:2020
Raghava RS (1988) J Polym Sci Polym Phys Edn 26:65
Gilbert AH, Bucknall CB (1991) Makromol Chem Macromol Symp 45:289
Chen MC, Hourston DJ, Sun WB (1995) Eur Polym J 31:199
Cho JB, Hwang JW, Cho K, An JH, Park CE (1993) Polymer 34:4832
Iijima T, Tochiomoto T, Tomoi M (1991) J Appl Polym Sci 63:311
Guo Q, Huang J, Li B, Chen T, Zhang H, Feng Z (1991) J Appl Polym Sci 63:311
Yee AF, Pearson RA (1990) Polym Mater Sci Eng 63:311
Kinloch AJ, Young RJ (1983) Fracture Behaviour of Polymers, Applied Science, New York
Brandrup J, Immergut EH (eds) (1989) Polymer Handbook, 3rd Edn, John Wiley & Sons In
Fox TG (1956) Bull Am Phys. Soc 1:123
Yamanaka K, Inoue T (1989) Polymer 30:662
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Zheng, S., Hu, Y., Guo, Q. et al. Miscibility, morphology and fracture toughness of epoxy resin/poly(vinyl acetate) blends. Colloid Polym Sci 274, 410–417 (1996). https://doi.org/10.1007/BF00652462
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DOI: https://doi.org/10.1007/BF00652462