SYNTHESIS OF POLY (PARA-PHENYLENE TEREPHTHALAMIDE) AND PREPARATION OF SHORT FIBERS: EFFECT OF SODIUM SULPHATE ON THE FIBERS

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SEMSARZADEH M.A.; DADKHAH A.

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Journal: Iranian Journal of Polymer Science and Technology Year:2011 | Volume:24 | Issue:2 (ISSUE NO. 112) Page(s): 113-120

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Title

SYNTHESIS OF POLY (PARA-PHENYLENE TEREPHTHALAMIDE) AND PREPARATION OF SHORT FIBERS: EFFECT OF SODIUM SULPHATE ON THE FIBERS

Author(s)

SEMSARZADEH M.A. | DADKHAH A. | Issue Writer Certificate

Keywords

SYNTHESISQ2

SULFURIC ACIDQ2

SHORT FIBERSQ3

SODIUM SULPHATE SALTQ2

POLY (PARA-PHENYLENE TEREPHTHALAMIDE)Q2

Abstract

Kevlar is one of the fibers which is used in heavy industrial productions such as, shipping, military and weaving for reinforcement of composites. Initial polymer of Kevlar or poly (para-phenylene terephthalamide) is an oriented liquid crystal polymer. Existence of aromatic group in the main chain leads to formation of rigid-rod molecules in the polymer, high strength and high modulus in it is fibers.Impurities in the polymer lead to decrease in fibers performance. In this research, poly (para - phenylene terephthalamide) was synthesized from polycondensation of phenylene diamine and terephthaloyl dichloride in n-methyl pyrrolidone and calcium chloride (NMP-CaCl2) solution. Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) tests were carried out to characterize chemical bonds and crystalline plates of the polymer, respectively. Concentrated SULFURIC ACID is a solvent of poly (phenylene terephthalate) therefore, this polymer was dissolved in concentreated SULFURIC ACID (96%) and the polymer solution was injected into the cylindrical tank contain water. SULFURIC ACID was transferred into water and the polymer was solidified. After solidification, tensile force of vortex led to orientation of rigid-rod polymer molecules in direction of water rotation and long fibers were formed from the polymer. The fibers were broken to SHORT FIBERS by the same force of vortex. The SHORT FIBERS were dried. SEM images showed the regular particles on the surface of fibers. Results of FTIR and XRD proved that the regular particles are SODIUM SULPHATE SALT. The effect of SODIUM SULPHATE SALT as an impurity on the SHORT FIBERS was studied.

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APA: Copy

SEMSARZADEH, M.A., & DADKHAH, A.. (2011). SYNTHESIS OF POLY (PARA-PHENYLENE TEREPHTHALAMIDE) AND PREPARATION OF SHORT FIBERS: EFFECT OF SODIUM SULPHATE ON THE FIBERS. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), 24(2 (ISSUE NO. 112)), 113-120. SID. https://sid.ir/paper/6227/en

Vancouver: Copy

SEMSARZADEH M.A., DADKHAH A.. SYNTHESIS OF POLY (PARA-PHENYLENE TEREPHTHALAMIDE) AND PREPARATION OF SHORT FIBERS: EFFECT OF SODIUM SULPHATE ON THE FIBERS. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)[Internet]. 2011;24(2 (ISSUE NO. 112)):113-120. Available from: https://sid.ir/paper/6227/en

IEEE: Copy

M.A. SEMSARZADEH, and A. DADKHAH, “SYNTHESIS OF POLY (PARA-PHENYLENE TEREPHTHALAMIDE) AND PREPARATION OF SHORT FIBERS: EFFECT OF SODIUM SULPHATE ON THE FIBERS,” IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), vol. 24, no. 2 (ISSUE NO. 112), pp. 113–120, 2011, [Online]. Available: https://sid.ir/paper/6227/en

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