DTDM

AcronymDefinition
DTDMDithiodimorpholine (chemical agent)
DTDMDo The Damn Mission
DTDMDeterministic Time Division Multiplexing
DTDMDigital Terminal Data Module
DTDMDatabase Technologies for Data Mining (workshop)
DTDMDistributed Team Decision Making (US NASA)
References in periodicals archive ?
These conventional sulfur cures outperform both the semi-EV cures based on the hi/lo and the DTDM systems.
Among these systems, the hi/lo and DTDM cures give better fatigue properties than the TMTD and ZBPD systems.
Trouser tear data show that the DTDM semi-EV cure system give the best tear resistance properties especially under overcure environment.
Both the hi/lo and DTDM semi-EV cure systems give long scorch time (Mooney scorch time t5) with fast rheometer cure rates as compared to the control cure system TBBS (figures 7 and 8).
TBSI Hi/Lo TMTD ZBPD Sulfur 2.5 2.5 1.5 1.5 1.5 TBBS 0.6 -- 1.5 0.7 1.0 TBSI -- 0.6 -- -- -- TMTD -- -- -- 0.5 -- ZBPD -- -- -- -- 1.25 DTDM -- -- -- -- -- DHTS -- -- -- -- -- BCI-MX -- -- -- -- -- Compound 6 7 8 9 Cure system I.D.
Hi/Lo DTDM HTS BCI-MX Sulfur 2.5 1.5 1.5 2.5 2.5 TBBS 0.6 1.5 0.6 0.6 0.6 DTDM - - 0.6 - - HTS - - 2 - BCI-MX - - - - 0.75
Note: The use of a secondary amine based curative system such as DTDM has been a concern in the rubber industry for a number of years.
Hi/Lo DTDM HTS BCI-MX Mooney Scorch @ 125 [degrees] C t5,(mins.) 26.5 31.4 40.5 20.4 25.1 Rheometer @ 150 [degrees] C T90, (mins,) 13.4 10.5 12.5 17 13.3
Hi/Lo DTDM Physical properties Stress/strain data Shore `A' hardness 59 59 61 100% modulus (Mpa) 2.19 2.15 2.44 300% modulus (Mpa) 11.36 11.68 12.56 Tensile strength (Mpa) 27.63 28.86 28.86 Elongation (%) 595 593 574 Overcure (10 x t90 @ 150 [degrees] C) Shore `A' hardness 63 64 61 100% modulus (Mpa) 2.03 2.72 2.65 300% modulus (Mpa) 10.92 13.66 13.01 Tensile strength (Mpa) 23.8 26.66 26.35 Elongation (%) 541 498 518 % 100% modulus retained 93 127 109 % Tensile retained 86 92 91 % Elongation retained 91 84 90 Rheometer reversion (mins.
Hi/Lo DTDM Monsanto Fatigue-to-failure (Kilocycles to fail @ 100% strain) Unaged 148 94 80 Overcure(10 x t90 @ 132 107 95 150 [degrees] C) Aged (48 hrs.
Hi/Lo DTDM Trouser tear test (Break force in Newton) Unaged: 7.4 7.7 8.2 Overcure (10 x t90) @ 100 [degrees] C 2.6 6.7 7.0 Aged (48 hrs, @ 100 [degrees] C) 4.7 1.8 5 Cure system HTS BCI-MX Trouser tear test (Break force in Newton) Unaged: 17 7.5 Overcure (10 x t90) @ 100 [degrees] C 12 3 Aged (48 hrs, @ 100 [degrees] C) 8.7 4.5