Engineering

Engineering Mechanics of Polymeric Materials: Theories, by Gabil Garibxan Ogli Aliyev, Faig Bakhman Ogli Naghiyev

By Gabil Garibxan Ogli Aliyev, Faig Bakhman Ogli Naghiyev

This booklet covers the idea of the power of laminated and strengthened constructions made from polymer fabrics in regards to the changeability of physico-chemical houses is tested. It provides an experimental-theoretical strategy at the definition of physico-mechanical houses of polymers composite fabrics and polymerized bundles made from fibers with emphasis at the alterations of physico-chemical homes of the fabrics. With mathematical strictness, the experimental and theoretical reports awarded right here will reduction within the improvement of trustworthy equipment and new practices of examining buildings with the impression of chemically competitive beverages and gases and within the construction of particular creation buildings that might stand up to corrosive environments.

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3). Note the following peculiarity. Let the samples made of two different polymer materials stay equal time in aggressive medium. During this time each of the polymer materials change their physico–mechanical properties because of influence of corrosive liquid and their swelling parameters will be different. Show the form of mathematical relation between the swelling parameters λ1 and λ2 . 57) Hence it follows that if the swelling parameter l1 for the first polymer material changes in the interval 0 ≤ λ1 ≤ λ1max , that is, for λ 0 ≤ λ1 = 1 ≤ 1 , λ1max then the swelling parameter λ2 of the second polymer material will change in the interval 0 ≤ λ2 = λ2 q2 λ1 ≤ λ2∗ ≤ λ2 max , that is, for 0 ≤ λ2 ≤ λ ≤ 1 .

Under the action of diffusion of corrosive liquid media, the density and volume of polymer 48 Engineering Mechanics of Polymeric Materials material will change. 96) Here, ∆γ = γ (λ ) − γ 0 , ∆V = V (λ ) − V0 . 102) is the quantity of thrust mass force that arises as a result of swelling of polymer material situated in the corrosive liquid medium. For λ = 0 , the thrust mass force R(λ ) = λQ0 equals zero. 104) acting on the volume V0 having the mass m0 = γ 0V0 is a vector of thrust mass force at the point to which the volume V0 concentrates.

Calculate how many times will be the process of diffusion of water into polypropylene moderated at pressure 60 MPa compared with the action of normal pressure if C∞ = 0 . 30) for normal pressure C C0 = 2 0 π . For high pressure C 60 C∞ 60 F060 =2 π , where F060 = D60 t60 R2 . 55 times. 1 × 10 × 10 cm3 by absorbing water under normal pressure if C0 = 0 and t = 1 days. 12 we can use the for10 R2 1 mulae obtained for an unbounded plate. 31) will be valid. 46) The obtained result certifies on very negligible water absorption of a polypropylene and its well water-resistance.

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