Effects of Toluene Diisocyanate`s Chemical Structure on Polyurethane`s a Mechanical Properties for Propellant

Afni Restasari and Retno Adiningsih and Luthfia Hajar Abdillah and Kendra Hartaya (2015) Effects of Toluene Diisocyanate`s Chemical Structure on Polyurethane`s a Mechanical Properties for Propellant. Proceedings International Seminar of Aerospace Science and Technology, 2015. pp. 59-67.

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Abstract

Toluene diisocyanate (TDI) is a curing agent that is used by LAPAN in developing composite solid propellant. TDI`s characteristics, such as %NCO, %2,4-TDI and %2,6-TDI can change during storage and depend on the availability of TDI`s specifications that are produced by its manufacturer. This changes can lead to differences in the characteristics of polyurethane that composes rocket propellant. Research about the effects of TDI`s characteristics changes on polyurethane`s characteristics are needed as a direction to invent a new and better HTPB / TDI mass ratio composition for propellant`s formula. In this research, viscosity, rate of increasing of viscosity, % elasticity and tensile strength of “polyurethane A” (Hydroxy Terminated Polybutadiene ( HTPB ) 2013 + TDI 2011 contains 2,4-TDI/2,6-TDI 58.4 : 41.6 ) and “polyurethane B” ( HTPB 2013 + TDI 2013 contains 2,4-TDI/2,6-TDI 42.2 : 57.8 ) that its HTPB / TDI mass ratio were 11:1, 12:1, 13:1, 14:1, 15:1 and 16:1, were measured. The correlation`s types and levels on the graphs of NCO / OH ratio versus viscosity, rate of increasing of viscosity, % elasticity and tensile strength were determined by using Microsoft Excel. TDI isomer content`s influences to those polyurethane`s properties were analysed. It is discovered that higher 2,4-TDI content increases the level of positive correlation between NCO / OH ratio and polyurethane`s viscosity and rate of increasing of viscosity, because of its isocyanate group`s reactivity. While, higher 2,6-TDI content increases the level of positive correlation between NCO / OH ratio and polyurethane`s tensile strength because of its symmetry chemical structure. But, the differences in TDI 2011 and 2013`s isomer contents only causes a few difference in the level of negative correlation between NCO / OH ratio and polyurethane`s % elasticity.

Item Type: Article
Additional Information: ISBN 978-602-71833-1-5
Uncontrolled Keywords: Toluene diisocyanate, viscosity, tensile strength, elasticity, propellant
Subjects: Teknologi Penerbangan dan Antariksa > Penelitian, Pengembangan, Perekayasaan, dan Pemanfaatan > Teknologi Roket
Divisions: Deputi Teknologi Penerbangan Dan Antariksa > Pusat Teknologi Penerbangan
Depositing User: Dinar Indrasasi
Date Deposited: 17 Mar 2021 13:42
Last Modified: 24 Sep 2021 00:53
URI: http://repositori.lapan.go.id/id/eprint/460

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