Adhesion behavior of nylon tire cord/adhesive/rubber systems

Iyengar, Y.

doi:10.1002/app.1969.070130208

Cited by 14 publications

(2 citation statements)

References 3 publications

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“…Introducing an interaction parameter $J to correct deviations from the geometric mean rule, WalkeP modified eq. (1) to become (2) The free energy A F for creating a new interface between two components is given…”

Section: Mechanisms Of Adhesion Developmentmentioning

confidence: 99%

Adhesion of kevlar aramid cords to rubber

Iyengar

1978

J. Appl. Polym. Sci.

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SynopsisAdhesion development to Kevlar aramid yarn is discussed in relation to polymer characteristics and parameters of molecular structure that determine specific or entropic interactions with adhesives. The effects of rubber compounding variables on adhesion of Kevlar tire cords treated with epoxy/RFL adhesives were determined using the single-cord pull-out and 2-ply peel adhesion tests, which differ in sensitivity to physical properties (stiffness) of the rubber compound. Kevlar adhesion was unaffected by changes in the curing system (e.g., sulfur level, type of sulfenamide accelerator) used in a high-modulus tire belt compound. Methylene donodacceptor-type bonding agents in the compound improved the adhesion initially and after exposure of dipped cords to ozone. RFL modifications (e.g., use of preformed versus in situ RF resins) improved adhesion. Effects of rubber compounds and adhesives on adhesion are discussed in relation to their chemical and physical characteristics. Lastly, two types of adhesive systems were developed for bonding Kevlar to highmodulus nitrile and neoprene compounds used in hoses. The simpler system involves curing an aqueous epoxy dip and then applying an air-drying, solvent-based cement (polyisocyanate). The other consists of curing two aqueous dips (epoxy/RFL with latex modification).

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Section: Mechanisms Of Adhesion Developmentmentioning

confidence: 99%

Adhesion of kevlar aramid cords to rubber

Iyengar

1978

J. Appl. Polym. Sci.

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“…Some researchers conducted static tests on specimens, as peeling, or pulling out ( H ‐tests or T ‐tests ). They investigated on the impact of environmental conditions, rubber or adhesive formulations, and cord or rubber surface properties.…”

Section: Introductionmentioning

confidence: 99%

Interfacial damage on fatigue‐loaded textile–rubber composites

Valantin

Lacroix

Deffarges

et al. 2014

J of Applied Polymer Sci

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To reach admissible lifetime expectancy, unidirectional textile–rubber composites must show a strong interface. Usually, it is achieved by coating the textile with Resorcinol–Formaldehyde–Latex (RFL). To evaluate fatigue impact on interfacial properties, composites with or without RFL are tested at different numbers of loading cycles and characterized through peel tests, dynamic mechanical analysis (DMA), scanning electron microscopy and energy‐dispersive X‐rays, and nanoindentation. For composites with RFL, the results indicate two main mechanisms for damaging: propagation of pre‐existing fibrillar microcracks at the rubber/RFL interface completed by adhesive debondings at the RFL/textile interface. At first, the propagation of fibrillar microcracks is correlated with decrease of global composite peeling resistance and contribution of interphase to DMA damping. Then, RFL/textile debondings become critical. They are highlighted with a change of peeling failure surface and could be explained by RFL hardening, highlighted by nanoindentation. This questions the choice for RFL as a sustainable adhesive for composites under fatigue loading. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41346.

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Blockcopolymere aus poly‐1,4‐benzamid und 6‐66‐copolyamid. 2. Haftvermittelnde eigenschaften in KEVLAR‐verbundsystemen

Martin¹,

Götz²,

Vollmert³

1985

Angew. Makromol. Chem.

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ZUSAMMENFASSUNG:KEVLAR-Filamente wurden mit der Losung eines Blockcopolymeren aus Poly- tive Steigerung der Delaminierungsarbeit mit 670% bei weitem am hochsten. Bei Polyamid-6 und bei der Polyamid-Polyethylen-Legierung betrug der Effekt 130%, wiihrend bei dem unpolaren Polyethylen praktisch keine h d e r u n g festzustellen war.REM-Untersuchungen der herausgezogenen Fasern lassen erkennen, da8 das ZerreiRen der Verbundmaterialien nicht nur entlang der Faser-Matrix-Grenzflache verlief, sondern da13 dabei auch grenzflachennahe Bereiche von Faser und Matrix beteiligt waren. SUMMARY:KEVLAR filaments were impregnated with a solution of a block copolymer of poly-I ,4-benzamide (K = 28 600) and 6-66-copolyamide (60/40) (R = 19 OOO) in 96% H,SO,. Afterwards, the filaments were embedded perpendicularly in thermoplast films of different polarities (polyamided, an ionomer of acrylic acid, acrylic ester and ethylene, a polyethylene-polyamide 6 blend and LD polyethylene). In pullout experiments, delamination shear strength, delamination work, and frictional shear strength were measured to characterize adhesion. Modification of KEVLAR filaments with blockcopolyamide caused a large increase of adhesion to polar matrix materials. For the ionomer film, the relative increase of delamination work (670%) was by far the highest, polyamided and polyamide-polyethylene blend showed an effect of 130Q0, whereas nonpolar polyethylene was nearly unsensitive to impregnation.Scanning electron microscopy investigations on the pulled out fibres showed that the failure of the composite material not only took place at the fibre-matrix interface but simultaneously in weak boundary layers of fibre and matrix phase.

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Adhesion behavior of nylon tire cord/adhesive/rubber systems

Cited by 14 publications

References 3 publications

Adhesion of kevlar aramid cords to rubber

Adhesion of kevlar aramid cords to rubber

Interfacial damage on fatigue‐loaded textile–rubber composites

Blockcopolymere aus poly‐1,4‐benzamid und 6‐66‐copolyamid. 2. Haftvermittelnde eigenschaften in KEVLAR‐verbundsystemen

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