WorldCat Identities

Gent, Alan N.

Works: 77 works in 135 publications in 3 languages and 1,003 library holdings
Genres: Conference papers and proceedings 
Roles: Author, Editor, Author of introduction, Other, Thesis advisor
Classifications: TA455.R8, 620.194
Publication Timeline
Most widely held works by Alan N Gent
Engineering with rubber : how to design rubber components by Alan N Gent( Book )

42 editions published between 1992 and 2012 in 3 languages and held by 255 WorldCat member libraries worldwide

This book provides the beginning engineer with the principles of rubber science and technology: what rubber is, how it behaves, and how to design engineering components with rubber. It introduces the reader to the principles on which successful use of rubber depends and offers solutions to the questions engineers in rubber processing face every day: - How is an elastomer chosen and a formulation developed - Why is rubber highly-elastic and relatively strong - How to estimate the stiffness and the strength of a product - How to guarantee high quality and durability The authors describe current practices in rubber engineering. At the end of each chapter, sample questions and problems (together with solutions) are provided, allowing the reader to gauge how well he/she has mastered the material. Contents: - Materials and Compounds - Elasticity - Dynamic Mechanical Properties - Strength - Mechanical Fatigue - Durability - Design of Components - Finite Element Analysis - Test and Specifications
Engineering with rubber : how to design rubber components( Book )

1 edition published in 2001 in English and held by 102 WorldCat member libraries worldwide

The Role of Chemical Bonding in Adhesion( Book )

8 editions published between 1977 and 1985 in English and held by 8 WorldCat member libraries worldwide

Progress in three different phases of our study of the role of chemical bonding in adhesion is summarized in this report. Phase one consisted of an experimental study of the self-adhesion of thin layers of three crosslinked elastomers; namely, cispolyisoprene (natural rubber) and two polybutadienes. For the polybutadienes, the strength of self-adhesion was found to be strongly dependent upon the time of exposure of the two surfaces to air before they were brought into contact. The same phenomenon did not take place on exposure to nitrogen nor for samples of cis-polyisoprene and it was reduced or delayed in samples containing antioxidant. It was therefore attributed to surface oxidation reactions that can lead to interfacial covalent bonds with polybutadiene but not with polyisoprene. Phase two consisted of a study of the effect of the number of chemical bonds at an interface between glass and polybutadiene on the joint strength of the adhesive bond formed between them
The pneumatic tire( Book )

3 editions published between 2005 and 2006 in English and held by 5 WorldCat member libraries worldwide

Mechanics of viscoelastic composites by Alan N Gent( Book )

5 editions published between 1968 and 1974 in English and held by 5 WorldCat member libraries worldwide

Apparatus has been developed to measure the dynamic mechanical properties of foamed materials filled with a viscous fluid, over a frequency range from 0.002 to 200 Hz and a temperature range from -50 o C to +100 o C. Measurements have been made on various foam/ fluid systems including rubber latex, polyether and polyester foams filled with air, glycerin, silicone oil and water. The Gent-Rusch theory has been modified to take into account inertia effects, damping in the matrix material itself, and special features of the text-piece assembly . The theory is shown to describe the measurements successfully and verifies the engineering validity of the approach outline. (Author-PL)
Tire Mechanics Symposium : the University of Akron, Aug. 1-5 by Tire Mechanics Symposium( Book )

2 editions published between 1993 and 1994 in English and held by 2 WorldCat member libraries worldwide

Molecular structure and physical behavior of polymers by M Morton( Book )

2 editions published between 1962 and 1963 in English and held by 2 WorldCat member libraries worldwide

Eight model copolymers were prepared by standard ester interchange techniques. They are poly (cis-trans 1,4-cyclohexylene dimethylene sebac ates) in which the percentage of the (trans 1,4 cyclohexylene dimethylene) groups ranges from 0 to 100%. The molecular weights were estimated from intrinsic viscosity determinations and by end group analysis. They appear to lie in the range 5,000 to 8,000. The melting temperatures were measured after crystallization at various tem peratures. By an extrapolation procedure the equilibrium melting temperatures were deduced. They showed a characteristic eutectic effect, the 30% trans copolymer having the lowest melting point. The rates of crystallization varied sharp ly with the crystallization temperature. The re lations for the different polymers were displaced along the temperature axis roughly in accord with their equilibrium melting temperatures. A signif ficant molecular weight effect was observed, the lower molecular weight polymers crystallizing more slowly at a given temperature. The amount of crystallization attained was found to vary with temperature in a complex manner. Several of the copolymers showed two maxima, whereas the homo polymers apparently gave a single sharp maximum at a temperature about 20 C below the equilibrium melting temperature. (Author)
The Relation of Molecular Structure to Adhesion( Book )

2 editions published in 1979 in English and held by 2 WorldCat member libraries worldwide

Structural adhesives are required to have a number of properties. They must be easy to apply, rigid when set, and strong under both impact loading and sustained loading. Moreover, they must adhere tenaciously to metal surfaces, even in the presence of aggressive environments and over long periods of time. These features cannot at present be predicted from the results of simple physical or chemical tests, and thus the relation between molecular structure and successful use as an adhesive is not understood. This situation is of serious concern to developers of new adhesive systems and also to users of advanced adhesion technology, notably the Air Force. A series of technical presentations and discussions by leading research scientists in adhesion was therefore held at The University of Akron on May 29 and 30, 1979. Recommendations on a systematic program of research directed towards solving this serious scientific and technical problem were then brought forward by each discussion group for consideration and review. (Author)
Science of adhesion by Alan N Gent( Book )

2 editions published between 1983 and 1984 in Undetermined and English and held by 2 WorldCat member libraries worldwide

Friction and abrasion of aircraft tire tread materials( Book )

1 edition published in 1975 in English and held by 1 WorldCat member library worldwide

Developments in engineering applications of rubber by Alan N Gent( Book )

1 edition published in 1961 in English and held by 1 WorldCat member library worldwide

Heat Build-Up and Blow-Out of Rubber Blocks( Book )

1 edition published in 1988 in English and held by 1 WorldCat member library worldwide

Rubber blocks heat up under repeatedly-applied severe deformations and sometimes explode ('blow out'). This phenomenon is shown to be due entirely to the high temperatures developed internally, about 200 C, which cause decomposition of the vulcanizate, and generation of a volatile product. When the internal pressure is high enough, the surrounding rubber is torn apart and the sample bursts. The same process can be observed with a microwave oven, when the rubber sample is heated internally, without stress, to the same critical temperature Tc. Values of Tc are reported for different vulcanizates of several elastomers. They are found to be lower for softer materials, in accord with the theory of elastic expansion to burst of internal gas bubbles, and lower for materials having less stable crosslinks; for example, polysulfidic instead of monosulfidic or C-C cross-links. Maximum values of Tc were about 240 C, significantly below the temperatures for rapid decomposition of the elastomers themselves. Possible reasons for this anomaly are discussed. Keywords: Explosive rupture; Fracture(Mechanics); Heating; Thermal decomposition
Effect of Interfacial Bonding on the Strength of Adhesion of Elastomers. III. Interlinking by Molecular Entanglements( Book )

1 edition published in 1984 in English and held by 1 WorldCat member library worldwide

Polydimethylsiloxane (PDMS) networks have been formed by endlinking linear PDMS molecules. When second layer is cast on top of a fully-gelled lower-layer, the new molecules diffuse into the surface of the lower layer and form molecular loops ('entanglements') in the course of endlinking with themselves. The two layers are then joined only by the macromolecular loops. Measurements have been made of the work required to separate such layers under threshold conditions, i.e., at low rates, high temperatures, and, in some cases, in the swollen state. Values of the work of detachment have been found to be generally about one-half of the work of fracture of the layers themselves, and consistent with the inferred density of interlinking molecular loops at the interface. The values were higher for higher densities, roughly in proportion, and for interlinking molecular strands of higher molecular weight, in accordance with the theory of Lake and Thomas. In the absence of interlinking the work of detachment was extremely small
Effect of Oxygen on the Tear Strength of Elastomers( Book )

1 edition published in 1989 in English and held by 1 WorldCat member library worldwide

Rates of tearing under steady and intermittent loads have been measured for some representative elastomers. The rate depended strongly upon the load and also upon the environment. Tearing was strongly upon the load and also upon the environment. Tearing was much slower for SBR and BR vulcanizates in vacuo, especially at low loads, by a factor of up to 10X. For NR the effect was quite small by a factor of 2X at the most. Experiments were also carried out in the presence of thiophenol vapor, a radical trap. For NR, the effect was found only at high loads, when tearing was much slower, by a factor of about 10X. The improvement persisted after thiophenol was removed it is attributed chemical modification of the vulcanizate. On the other hand, tearing of SBR was accelerated at all loads by thiophenol vapor, to the same degree as in air. Much smaller effects were found for a peroxide vulcanizate off SBR. It is concluded that the reactions of sulfur crosslinks with radical acceptors, including oxygen, lead to an increased rate of tearing in SBR. For BR and NR vulcanizates the situation is less clear, because of the smaller effect of oxygen in the first case and of thiophenol in the second. Keywords: Fatigue; Crack growth. (KR)
Xiang jiao gong cheng by te Zhan( Book )

1 edition published in 2002 in Chinese and held by 1 WorldCat member library worldwide

Ben shu zhu yao nei rong bao kuo:cai liao yu pei he,Dan xing,Dong tai ji xie xing neng,Qiang du,Ji xie pi lao,Nai jiu xing,Xiang jiao pei jian de she ji,You xian yuan fen xi,Ce shi yu gui fan deng
Diffusion and Equilibrium Swelling of Macromolecular Networks by Their Linear Homologs( Book )

1 edition published in 1982 in English and held by 1 WorldCat member library worldwide

Polydimethylsiloxane (PDMS) networks having strands of molecular weight in the range 11,000-36,000 have been prepared by endlinking linear PDMS molecules of these molecular weights with a tetrafunctional linking agent. Absorption of a series of homologous linear PDMS molecules by the resulting PDMS networks has been investigated. The diffusion coefficients at 70 deg were found to be rather large, 1x10 to the minus 12th power - 6x10 to the minus 12th power m(2)/s, and approximately inversely proportional to the molecular weight of the diffusion liquid, over the range 5,000-38,000. the amounts of liquid absorbed at equilibrium was relatively small, 10% - 80% in good agreement in all cases with an especially simple version of the Flory-Huggins theory when the heat of mixing is made vanishingly small and only entropic terms are retained
Micromechanics of fractures in elastomers by Alan N Gent( Book )

1 edition published in 1984 in English and held by 1 WorldCat member library worldwide

Adhesion of Elastomers to Rigid Substrates--Three Substrates with Unexpectedly High Adhesion( Book )

1 edition published in 1977 in English and held by 1 WorldCat member library worldwide

An unexpectedly high level of adhesion has been observed for simple hydrocarbon elastomers applied to certain glassy substrates: polyphenylene oxide, polysulfone and polycarbonate. The force required to separate an elastomer layer from these substrates was more than six times larger than for other glassy substrates, e.g., polystyrene and polyethyleneterephthalate. The origin of this anomalously high adhesion is not known. (Author)
Force-deflection relations for a model air spring by Alan N Gent( )

1 edition published in 1974 in English and held by 1 WorldCat member library worldwide

Chemistry of Silane Coupling Reactions. II. Reaction of Dimethylmethoxysilanated Poly(butadiene) with Triethylsilanol and with Glass( Book )

1 edition published in 1978 in English and held by 1 WorldCat member library worldwide

Poly(butadiene) having a dimethylmethoxysilane endgroup has been found to react with a model silanol, triethylsilanol, in the same way as a simple silane does, yielding the addition product, methanol, and dimers of the two starting materials. This reaction takes place readily at room temperature in benzene solution. A corresponding addition reaction between silanated poly(butadiene) and the OH groups present on the surface of glass has therefore been inferred. This is corroborated by a greater degree of retention of silanated poly(butadiene) compared to unsilanated poly(butadiene) on glass slides subjected to thorough washing, and by direct observation of polymer particles, about 0.3 micrometer in size, adhering to the glass treated with silanated poly(butadiene). (Author)
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Engineering with rubber : how to design rubber components
Alternative Names
Alan Neville Gent British scientist

Alan Neville Gent Brits ingenieur (1927-2012)

Gent, A.N.

Gent, Alan N.

Engineering with rubber : how to design rubber components