Pdf effects of particle size, particlematrix interface. This combination may create the better dispersion of materials into the matrices. Reinforcement of adhesion and development of morphology at polymerpolymer interface via reactive compatibilization. Pdf adhesion mechanisms at soft polymer interfaces.
Interfaceinterphase engineering of polymers for adhesion. Viscoelastic moduli are mainly governed by the volume fraction of particles 65 and strain rate has important e. Polymer interface and adhesion ebook by wu 97851423526. The friction force of a crosslinked polymer was orders of magnitude less than that of an uncrosslinked polymer. The aim of this study was to characterize two different copper grades, oxygenfree copper, and phosphorous deoxidized copper, with aminofunctional silane layers on them and to study these silane layers as coupling agents in the injectionmolded thermoplastic urethanecopper hybrids. Allara bell communications research, room 7f212, 600 mountain avenue, murray hill, nj 07974 u. Polymer interface and adhesion 1st edition wu routledge. Polymer interface and adhesion by souheng wu, 1982, m. Chemical bonding, adhesion, and interface design 1. The forces that cause adhesion and cohesion can be divided into several types. Polymer composites are noted to show mechanical properties which depend on time, rate and temperature 64.
Emphasis is placed on physical concepts and mechanisms, using clear, understandable mathematics. Study of polymer interface and adhesion by eftem request pdf. Higher surface energy correlates with superior interface adhesion. Polymer interface and adhesion promotes a more thorough understanding of the physical,mechanical, and adhesive properties of multiphase, polymer systems. Adhesion is the tendency of dissimilar particles or surfaces to cling to one another cohesion refers to the tendency of similar or identical particlessurfaces to cling to one another. Adhesion and fracture of interfaces between immiscible. Bonding and adhesion of polymer interfaces sciencedirect. Y, on the solid surface, and the bond strength of the stickerreceptor xy acidbase interaction. Souheng wu is the author of polymer interface and adhesion 0. Read polymer interface and adhesion by wu available from rakuten kobo.
In order to obtain a measurable fracture toughness, a joint between two immiscible polymer glasses must be able to transfer mechanical stress across the interface. In order to enhance polymer metal composite performance, the primary goal of this project is to assess how different surface treatments affect the interfacial adhesion of polymer metal composites on the macro scale. In contrast, after chain scission of the outermost layers, the adhesion hysteresis and friction forces increase substantially. For polymer ceramic interfaces is common physical bonding 61, ceramic grafting is frequently used to enhance adhesion in hybrid composites. They also typically have a lower modulus and deformation resistance than other materials. Dec 12, 2016 effects of crystallization on the interface, chemical and physical techniques for surface modification of nanocellulose reinforcements electromicromechanical and nanoindentation techniques for interface evaluation, molecular dynamics md simulations to quantify fillermatrix adhesion and nanocomposite mechanical properties. Usually, to achieve better interfacial adhesion, the combination of materials must have the same properties, such as hydrophilic fillers and hydrophilic matrices or hydrophobic and hydrophobic materials, which creates a. The chemisorption of polymer chains is explained by the appearance of strong chemical bonds at the contact points.
Emphasis is placed on physical concepts and mechanisms,using clear, understandable mathematics. Surface, interfacial and molecular aspects of polymer bioadhesion. This stress transfer capability is very weak for narrow interfaces and a significant reinforcement can be achieved, either by the use of connecting chains block copolymers, or by a broadening of the interface random copolymers. The results obtained showed clearly an overall improved mechanical behavior of graphene polymer interface, since an increase as well as a more uniform shift distribution with strain is. The adhesion of polymerpolymer interfaces mrs online. Many types of intrinsic forces operate within the polymersolid interface, and the nature of such forces is most important.
Nov 22, 2017 poly mer interface and adhesion provides the critical basis for further advancement in thisfield. Polymer scientistsand engineers, surface chemists, materials scientists, rheologists. Poly mer interface and adhesion provides the critical basis for. Jun 18, 2012 the results indicated that a small amount of silane molecules added to epoxy could substantially change the polymer epoxy interfacial structure, greatly affecting the adhesion strength at the interface. Preparation and characterization of functionalized polypropylene with acrylamide and itaconic acid. Interfacial thermodynamics molecular interpretations interfacial and surface tensions of polymer melts and liquids contact angles of liquids on solid. Through the use of microscopic and spectroscopic analyses of the surface chemistry at the polymer metal interface, in conjunction with creping experiments, the role of the chemical constituents in the microstructural and the physiochemical development of adhesion, and the critical parameters for processing operations have been studied. Polymers gain their strength from the mechanical interconnection between different chains. Adhesion at polymersolid interfaces was explored for a new biobased pressure sensitive adhesive psa in terms of sticker groups.
This work establishes the basis that polar groups and free radicals improve adhesion between polymeric thermoplastics and metallic surfaces. Combining the principles of interfacial science, rheology, stress analysis, and fracturemechanics, the book teaches a new approach to the analysis of long standing problemssuch as. Aug 03, 2010 polymer interface and adhesion by souheng wu, 1982, m. Jul 19, 2002 the adhesion and friction of smooth polymer surfaces were studied below the glass transition temperature by use of a surface forces apparatus. Interfacial thermodynamics molecular interpretations interfacial and surface tensions of polymer melts and liquids contact angles of liquids on solid polymers surface tension and polarity of solid polymers wetting of highenergy surfaces dynamic contact angles and wetting. Interfacial adhesion an overview sciencedirect topics. Noolandi xerox research center of canada, 2660 speakman drive, mississauga. Materials science and engineering, 83 1986 2226 2 chapter 5 bonding and adhesion of polymer interfaces d. Based on several significant examples, we analyse the adhesion mechanisms at soft polymer interfaces with a special emphasis first on the role of connector molecules, that is, polymer chains bound to the interface and which transmit stress through a. The adhesion of glassy or semicrystalline polymers to themselves or to other polymers is often poor. Part of the polymer science and technology book series pols, volume 12. Onestep in situ modification of halloysite nanotubes. Jul 23, 2003 to form strong polymer polymer adhesion it is necessary for the network to be continuous across the interface.
The intermolecular forces responsible for the function of various kinds of. Interfacial adhesion occurs when two different materials are combined, blended, or mixed. Effects of particle size, particlematrix interface adhesion and particle loading on mechanical properties of particulatepolymer composites. Poly mer interface and adhesion provides the critical basis for further advancement in thisfield. Pdf we studied enhanced interfacial adhesion between a flexible amorphous polymer polystyrene, ps and a semicrystalline polymer a polyamide, ny6. Development of various products are based on the unique properties of. Adhesion and friction mechanisms of polymeronpolymer. Polymer interface and adhesion ebook by wu rakuten kobo. Interface interphase engineering of polymers for adhesion enhancement. Therefore, an understanding of the polymer adhesion mechanism is absolutely necessary in order to.
Good polymerfiller adhesion leads to a better state of filler dispersion in the polymer matrix as evident from the effective freespace length l f of the transmission electron microscopy analysis, wideangle xray diffraction, field emission scanning electron microscopy, and atomic force microscopy study of the nanocomposites. Dec 20, 2007 based on several significant examples, we analyse the adhesion mechanisms at soft polymer interfaces with a special emphasis first on the role of connector molecules, that is, polymer chains bound to the interface and which transmit stress through a stretching and extraction mechanism, and second on the necessary relay that must be taken by. Molecular level understanding of adhesion mechanisms at the. Review of micromechanical aspects of polymer interface reinforcement through surface grafted molecular brushes. Adhesion mechanism between metal and polymer interface. Mechanisms of wettability and bondability improvements adhesion. The copper surfaces were asreceived and modified, i. Aminofunctional silane layers for improved copperpolymer. This interconnection can occur either by the use of long chains that entangle with each other or by chemically joining the chains by crosslinking. Polymer interface and adhesion promotes a more thorough understanding of the physical, mechanical, and adhesive properties of multiphase, polymer systems. Allylcyanide and a mixture of xylene, air and o xygen. This continuity can be formed by i chain interdiffusion, if the materials are sufficiently miscible, by ii the use of coupling chains placed at the interface or iii by chemical reaction to form coupling chains at the interface. In section 4, after discussing some limitations of our approach, we try to relate a macroscopic quantity as the adhesion energy to our previous microscopic results.
Interfacial thermodynamics molecular interpretations interfacial and surface tensions of polymer melts and liquids contact angles of liquids on solid polymers surface tension and polarity of solid polymers wetting of highenergy surfaces dynamic contact angles and wetting kinetics experimental methods for contact angles and interfacial tensions modifications of polymer surfaces. In the usual glass fiber sizing formulation, the film former makes up more than 70% of a sizing recipe based on solids content, and has to be stable in the final sizing formulation. The nature of the adhesive interface, the surface roughness, the chemical structure of the bioadhesivecandidate material, the swelling hydration at the. It was found that ordered methyl groups at the interface lead to weak adhesion, and disordered interfaces lead to strong adhesion. Polymerpolymer interface adhesion by in situ compatibilization ho youn kim a and yongsok seo a a intellectual te xtile system resea rch center itrc an.
Enhancing the adhesion of graphene to polymer substrates by. Chemical bonds are considerably stronger than intermolecular bonds within the polymer interface. Based on several significant examples, we analyse the adhesion mechanisms at soft polymer interfaces with a special emphasis first on the role of connector molecules, that is, polymer chains bound to the interface and which transmit stress through a stretching and extraction mechanism, and second on the necessary relay that must be taken by. Adhesion changes at metalpolymer interfaces mafiadoc. The main part of this chapter has been submitted for publication. Interfaceinterphase in polymer nanocomposites wiley online. Reinforcement of adhesion and development of morphology at. Fowkes department of chemistry, lehigh university, building 6, bethlehem, pa 18015 u. Poly mer interface and adhesion provides the critical basis for further advancement. Polymer interface and adhesion 1982 edition open library.
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