Polymers Textiles

Fluid Effects in Polymers and Polymeric Composites by Y. Jack Weitsman

By Y. Jack Weitsman

Fluid results in Polymers and Polymeric Composites, written via the past due Dr. Y. Jack Weitsman, addresses the big variety of parameters that impact the interplay of fluids with polymers and polymeric composites. The e-book goals at broadening the scope of accessible facts, more often than not constrained as much as this time to weight-gain recordings of fluid ingress into polymers and composites, to the sensible conditions of fluctuating publicity. numerous different types of experimental information are given, along with theoretical versions derived from uncomplicated clinical ideas, and correlated with severity of publicity stipulations and interpreted by way of rationally dependent theoretical types. the sensible implications of the consequences of fluids are discussed.

The factor of fluid results on polymers and polymeric composites is of shock to engineers and scientists energetic in aerospace and naval constructions, as an expanding element of those buildings are made from polymeric composites and hire polymeric adhesives as a becoming a member of gadget. whereas the e-book is meant for this viewers, it is going to additionally curiosity researchers and graduate scholars drawn to the mechanics and fabrics features of this matter.

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Fluid Effects in Polymers and Polymeric Composites

Fluid results in Polymers and Polymeric Composites, written through the overdue Dr. Y. Jack Weitsman, addresses the big variety of parameters that impact the interplay of fluids with polymers and polymeric composites. The e-book goals at broadening the scope of obtainable info, in most cases constrained as much as this time to weight-gain recordings of fluid ingress into polymers and composites, to the sensible situations of fluctuating publicity.

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At the other extreme, namely that of a very thick slab, the diffusion process is slower than that of relaxation and fluid ingress tends to be governed by the diffusivity of fully relaxed polymeric chains. For intermediate slab thicknesses the process is fully coupled and will depend on the entire history of fluid ingress process. ” Typical weight gain data, exhibiting earlier results for an unrelaxed polymer, followed by the combined effects of diffusion and relaxation, are shown in Fig. 4. A detailed discussion of this topic is presented in Chap.

J Appl Polym Sci 23(4–6):4467–4493 Gurtin ME, Yatomi C (1979) On a model for two phase diffusion in composite materials. J Compos Mater 13(2):126–130 Haase R (1969) Thermodynamics of irreversible processes. Addison-Wesley, New York (especially section 1–19) Kawagoe M, Hashimoto S, Nomiya M, Morita M, Qiu J, Mizuno W, Kitano H (1999) Effect of water absorption and desorption on the interfacial degradation in a model composite of an aramid fibre and unsaturated polyester evaluated by Raman and FT infra-red microspectroscopy.

15 Osmosis In many circumstances polymers may act as a semi-permeable membrane when exposed to a mixture of external vapor or fluid molecules. This phenomenon results in an osmotic pressure that induces internal damage and affects the diffusion process, rendering it sensitive to the detailed composition of such mixture (Ashbee 1989). 31) Where am and bm are constants, and RH is in %. Other forms are also possible. 17 Temperature Dependence of Diffusion Coefficient The diffusion coefficient D, which affects the time-to-saturation, is extremely sensitive to temperature T.

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