Thermogravimetric index

The correlation of thermogravimetric index numbers with analytical data are listed in Table 4-136. Out of the three index numbers which describe the evaporation behavior. 

Correlation of with thermogravimetric index numbers, i.e. T %, T5 %, AG400, and CR is shown in Table 4-140. 

Isosorbide and dianhydroiditol polycarbonate resins used as molding plastics, which provide a high thermogravimetric index, transparency, and ultraviolet resistance. 

The applications potential of cyclophosphazenes is apparent from the large number of patents and applications oriented studies which have appeared this year. The use of phosphazenes as flame retardants continues to represent the area of greatest activity. A comprehensive structure-activity study of the oxygen index, and thermogravimetric characteristics of several cyclo- and cyclolinear phosphazenes shows that flame retarding efficiency is in the following order NPCl2>NP(ORp) Cl>NP(0Rp)2>NP(0Rp) (OR) >NP(OPh) Cl>NP(OR) 2 (Rp=CH2(CF2) H, n=2,4,6 R=alkyl) Similar studies on... 

Resistance to environmental stress cracking - Measurement of the melt flow index -Carbon black and/or mineral filler content measurement in polyethy-lene by direct combustion - Measurement of carbon black content by thermogravimetric analysis (TGA) - Assessment of carbon black dispersion in polyethylene using a microscope... 

Thermogravimetric (TG) analysis is used to determine the water content of clays. The weight loss at 110°C measures the interlayer water, whereas the bound water is lost between 400°C and 1000°C. The temperature at which bound water is lost is used in the identification of clays. For example, kaolin decomposes at 500-650°C to lose its bound water, whilst illite shows staggered weight loss between 400°C and 1000°C. Identification of clays is also carried out by IR spectroscopy in conjunction with XRD. The crystal structure is usually determined by XRD. Refractive index is also a very useful indicator of clay types. 

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