The concentration dependences of the adhesive strength, τ, of joints of 150 μm diameter steel wire and modified epoxy binder were investigated. The modifier used was PSK-1 polysulphone of different molecular weight, M. The concentration, C, of PSK-1 was varied from 5 to 20 wt%. It was shown that the form of the τ-C curves changes with change in M. At M = 5000 and 10 000, τ is not dependent on C; at M = 17 000 and 27 000, the τ-C relationship is described by a curve with a maximum. At M = 35 000 and 42 000, the adhesive strength decreases with increase in C. The factors affecting the measured value of τ in the case of epoxides modified with heat-resistant thermoplastics are considered.
MinB.-G., Reaction mechanism, microstructure, and fracture properties of thermoplastic polysulfone-modified epoxy resin. J. Appl. Polym. Sci., 50(6): 1065–1072 (1993).
2.
YoonT., Structure development via reaction-induced phase separation in tetrafunctional epoxy/polysulfone blends. J. Appl. Polym. Sci., 66(12): 2233–2242 (1997).
3.
RatnaD., Amine-terminated polysulfone as modifier for epoxy resin. J. Appl. Polym. Sci., 65(5): 901–907 (1997).
4.
HaungP., Miscibility and mechanical properties of epoxy resin/polysulfone blends. Polymer, 38(22): 5565–5571 (1997).
5.
MinB.-G., Reaction mechanism, microstructure, and fracture properties of thermoplastic polysulfone-modified epoxy resin. J. Appl. Polym. Sci., 50(6): 1065–1072 (1993).
6.
MinB.-G., Microstructural effect and the toughening of thermoplastic modified epoxy resins. J. Appl. Polym. Sci., 50(9): 1511–1518 (1993).
7.
OyangurenP.A., Development of bicontinuous morphologies in polysulfone–epoxy blends. Polymer, 40(19): 5249–5255 (1999).
8.
GorbatkinaYu.A., Adhesive Strength of Fibre–Polymer Systems.Khimiya, Moscow (1987).
9.
GorbatkinaYu.A., Adhesive Strength of Fibre–Polymer Systems.Ellis Horwood, New York/London/Toronto (1992).
10.
GorbatkinaYu.A., The adhesion properties of shungite-filled polypropylene. Zh. Fiz. Khim., 75(12): 2206–2211 (2001).
11.
GorbatkinaYu.A., Polymer Composite Materials. Properties, Structure, Technologies, ed. by BerlinA.A.Professiya, St Petersburg (2009).
12.
GorbatkinaYu.A., and Ivanova-MumzhievaV.G., The adhesion capacity of carbon-black-filled epoxides. Klei Germet. Tekhnol., (11): 2–5 (2008).
13.
GorbatkinaYu.A., Controlling the adhesion properties of an epoxy oligomer with a shungite filler. Klei Germet. Tekhnol., (4): 10–13 (2005).
14.
GorbatkinaYu.A., The adhesion capacity of an epoxy–bisphenol A oligomer filled with aluminium oxide powder. Klei Germet. Tekhnol., (11): 18–23 (2006).
15.
GorbatkinaYu.A., The interface strength in joints of particulate-filled epoxy binders with fibres. Mekh. Kompoz. Mater., 43(1): 3–14 (2007).
16.
GorbatkinaYu.A., Adhesion of modified polymers to fibres: maxima on ‘adhesive strength–modifier amount’ curves and the causes of their appearance. Int. J. Adhes. Adhes., 29(1): 9–17 (2009).
17.
GorbatkinaYu.A., The change in the adhesion properties of epoxy/polysulphone blends during curing. Vys. Soed., A47(8): 1160–1168 (2005).
18.
GorbatkinaYu.A., The adhesion properties of composites based on epoxy resin modified with polyetherimide or polysulphone. Mekh. Kompoz. Mater. Konstrukts., 20(2): 207–218 (2014).
19.
BudylinN.Yu.,, Comparative investigations of the mutual diffusion and phase state in blends of epoxy oligomers with polysulphones and polyether sulphones. Collection of Papers of 19th All-Russian Conference ‘Structure and Dynamics of Molecular Systems', Vol. 2. Institute of Physical Chemistry and Electrochemistry, Russ. Acad. Sci., Moscow, pp. 192–195 (2012).
20.
ChalykhA.E., The compatibility and evolution of the phase structure of blends of polysulphone and curing epoxy oligomers. Vys. Soed., A45(7): 1148–1159 (2003).
