These are also referred to as macromolecules, which are formed by joining of repeating structural units on a. The aim of this study was to characterize two different copper grades, oxygen free 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. It can be measured in terms of work of adhesion in jm 2. The book starts by providing a historical background on the studies and theories of the interface. The results revealed that the flattened chains do not show any adhesion even with the chemically identical free polymer on top, while the loosely adsorbed chains exhibit adhesion. The interfacial width is measured accurately by neutron reflectivity, and the fracture toughness of the interfaces is determined from a double cantilever beam test. Good adhesion between fiber and matrix is a prerequisite for high strength in the resulting composite. Additionally, the classical equation of interface failure was reexamined to see the effects of deformation rate, annealing temperature, and annealing time. Adhesion mechanism between metal and polymer interface. The friction force of a crosslinked polymer was orders of magnitude less than that of an uncrosslinked polymer. The aim of this study is to investigate the potential of the composite peel test to assess interface adhesion in composite bonded structures.
Here, the effects of polymer surface properties on the adhesion of p. Chan, edwin paknin, adhesion of patterned polymer interfaces. Polymer interface and adhesion by souheng wu, 1982, m. The greater the similarity between the solid material and the liquid coating in terms of their polar and disperse components, the better. Adhesion mechanisms at soft polymer interfaces citeseerx. Interfacial adhesion occurs when two different materials are combined, blended, or mixed. This combination may create the better dispersion of materials into the matrices.
Three polymer blends namely pspmma, ppnbr and pvcsan were irradiated with ebeam and microwaves, in order to bring about interfacial modification, and were characterized in terms of free volume. Open library is an open, editable library catalog, building towards a web page for every book ever published. The role of the interface in adhesion phenomena the role of the interface in adhesion phenomena mittal, k. 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. For the former systems, practical adhesion as determined experimentally, for example, by peel, tensile, or shear strengths is a function of. The interfacial adhesion of the chemically andor mechanically bonded fibermatrix plays a vital role in determining the mechanical properties of the composites 22. Tailored polymernonpolymer interfaces for controlled adhesion. Download citation polymer interface and adhesion poly mer interface and adhesion provides the critical basis for further advancement in thisfield. It is a multidisciplinary topic which includes surface chemistry, physics, rheology, polymer chemistry, stress analysis, polymer physics and fracture analysis. Overview on the surface and adhesion phenomena at interfaces in polymer systems. Polymers free fulltext polymer interface molecular engineering.
Polymer interface and adhesion ebook by wu 97851423526. Generally, adhesion is dictated by mutual polar and nonpolar disperse interactions between the polymer and the coating material. Stress transfer by one connector polymer molecule at solid. The adhesion of hydrogels has attracted substantial attention for use in building threedimensional constructs such as scaffolds for cell culture, carriers of. Through the use of microscopic and spectroscopic analyses of the surface chemistry at the polymermetal 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. Poly mer interface and adhesion provides the critical basis for further advancement. The term polymer is defined as very large molecules having high molecular mass 103107u.
In contrast, after chain scission of the outermost layers, the adhesion hysteresis and friction forces increase substantially. Neutron reflectivity experiments corroborated that the difference in the interfacial adhesion is not attributed to the interfacial brodening at the free polymer. The role of the interface in adhesion phenomena, polymer. Adhesion is the tendency of dissimilar surfaces to stick to one another. Polymer interface and adhesion ebook by wu rakuten kobo. Aminofunctional silane layers for improved copperpolymer. It can also be measured as peel in nm, which is the force required to pull off a strip of material that is 1 meter wide. Polymer surface properties and their effect on the. Polymer interface and adhesion 1982 edition open library. Coating adhesion to low surface free energy substrates. The understanding of adhesion mechanisms at polymer interfaces has thus. Objectives polymers national council of educational. 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 additional dissipation mechanisms acting at larger.
Interfacial thermodynamics molecular interpretations interfacial and surface tensions of polymer melts and liquids contact angles of liquids on solid. Souheng wu is the author of polymer interface and adhesion 0. Structureinduced switching of interpolymer adhesion at a. Adhesion is the interatomic and intermolecular interaction at the interface of two surfaces. Therefore, an understandi ng of the poly mer adhesion m echanism is absolutely. Development of various products are based on the unique properties of. Practical adhesion an overview sciencedirect topics. A simple scaling analysis of free energy of an adsorbed polymer on a solid surface was extended to predict the adhesion potential of. Acidbase interactions and adhesion in polymermetal systems by irina a. This paper introduces a new type of peel tests dedicated to composite bonding. This indicates that a part of the adhesion work of aqueous surfactant solutions was connected with the surfactants layer formation at the polymerair and polymerwater interfaces, which have different properties from layer formed at the waterair interface. Direct correlation between interfacial width and adhesion.
Adhesion of polymer interfaces reinforced with random and. Interfaces in polymer matrix composites covers the interface region as deduced from extensive practical studies of composite properties and from scientific studies of surfaces and surface modifiers. Interfaces in polymer matrix composites 1st edition. 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. Download citation polymer interface and adhesion poly mer interface and. Optimum polymer solid interface design for adhesion. In order to calculate the practical adhesion in terms of the interfacial fracture. Interfacial adhesion an overview sciencedirect topics. Poly mer interface and adhesion provides the critical basis for. In this geometry, one can change the thickness of the homopolymer substrates and thus control the ratio of shear to tensile stress intensity the mixity at the crack tip. Calculations of surface free energies from contact angle data in section. 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. Poly mer interface and adhesion provides the critical basis for further advancement in thisfield.
Wettability and adhesion work prediction in the polymer. The adhesion and friction of smooth polymer surfaces were studied below the glass transition temperature by use of a surface forces apparatus. Polymer interface and adhesion 1st edition wu routledge book. The effect of oxidation of carbon black cb on the heterogeneous distribution in polymer blends was examined. The correlation between interfacial width and adhesion, as expressed by the fracture toughness of the interface, in glassy polymers is investigated. 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. The reinforcement effect of a thin layer of random copolymer at the interface between immiscible homopolymers was studied using an asymmetric double cantilever beam adcb test. Enter your mobile number or email address below and well send you a link to download the free kindle app. Test method to assess interface adhesion in composite bonding. 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 additional dissipation mechanisms acting at. Adhesion and friction mechanisms of polymeronpolymer.
To form strong polymerpolymer adhesion it is necessary for the network to be continuous across the interface. This open access dissertation is brought to you for free and open access by. This test is inspired on the standard floating roller peel test widely used for metal bonding. Here we address the question how the adhesion properties change once the substrate is coated with supported thin polymer. View or download all content the institution has subscribed to. In this work, an effective method of characterizing the adhesion at the interface of partially miscible and immiscible binary polymer is used. The designed interfacial layer significantly increases adhesion between polymeric substrates and coating metal layers, to improve the durability of etextiles. The designed interfacial layer significantly increases adhesion between polymeric substrates and coating metal layers, to improve the durability of e textiles. In order to derive some useful predictions associated with adhesion phenomena at polymerpolymer interfaces, mechanical theory. Polymer interface and adhesion, marcel dekker, inc. The adhesive ability of metalpolymer systems based on epoxy compositions, polyolefins, and rubbers was studied as a function of absolute difference in acidbase properties. The copper surfaces were asreceived and modified, i. Read polymer interface and adhesion by wu available from rakuten kobo. Then you can start reading kindle books on your smartphone, tablet, or computer no kindle device required.
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