On the micromechanics of composites containing spherical inclusions

Effect of morphology on fracture toughness of unsaturated polyester-based hybrid nanocomposites

“…The interfacial adhesion strength required to avoid debonding decreases as the ratio of the particle modulus (E p ) to the matrix modulus (E m ) increases [29,38]. Stiff particles like glass beads, create a high stress state at the interface [38], thus a high interfacial adhesion strength is essential whereas a low interfacial adhesion strength is sufficient for soft particles like rubber. Due to the low localized yielding of orthophthalic unsaturated polyesters, minimizing crack deflection compared to crack pinning benefits toughening [15].…”

Effect of fiber-matrix adhesion on the fracture behavior of a carbon fiber reinforced thermoplastic-modified epoxy matrix

“…In this case, since more and smaller inclusions of PSF are present in the composite, more routes of possible energy dissipation will be created. Liu and Nauman [26] pointed out that the presence of inclusions acts as a yield initiator as well as a crack arrestor. However, they also found that the adhesion between particle and matrix becomes more important as the stiffness of the inclusion increases.…”

Effects of silicone oil and polymeric modifiers on the mechanical properties of highly filled LLDPE

“…The additives used were: (1) Silane coupling agent KH-550 (Nanjing Shuguang Chemical General Company, Nanjing, China), (2) Titanate coupling agent NDZ-130 (Nanjing Shuguang Chemical General Company), (3) Silicone oil 201-50 (Shanghai Special Resin Research Institute, Shanghai, China), (4) Silane-grafted HDPE Polidan T/A (Si-g-PE), a commercial product of Padanaplast SpA, Roccabiana, Italy, with a MI of 0.33 g/10min (190°C, 5 kg), (5) Acrylic-acid-graft EVA copolymer (AA-g-EVA), containing 3% acrylic acid, VA content of 15% and a MI 2 g/10 min (190°C, 2.16 kg) (6) ethylene-propylenediene terpolymer (EPDM) 4045, from Mitsui Petrochemical Industries Ltd., Tokyo, Japan, and (7) Engage 8210, a copolymer of ethylene and 1-octene from Dow Chemical Company, Wilmington, DE, with a MI of 8.0 g/min (190°C, 2.16 kg).…”

“…Extensive work has been done in such fields. [3][4][5][6][7][8][9][10][11][12][13][14][15][16] Weak or strong adhesion can be reached by virtue of different modifications of fillers or matrices, which result in different mechanical properties of the resulting composites. Jancar et al 3,4 and Dubnikova et al 5 studied filled polypropylene (PP) composites having strong or weak adhesion and concluded that strong adhesion leads to increased modulus and tensile strength, whereas zero adhesion causes decreased tensile strength and increased elongation at break.…”