ASTM E1641-13 Method for Decomposition Kinetics by Thermogravimetry using the Ozawa/Flynn/Wall Method
ASTM E1641-13 test method determines the decomposition kinetics by thermogravimetry using the Ozawa/Flynn/Wall Method. ASTM E1641-13 test method calculates thermal endurance. Apparatus used to perform this test method are thermobalance, temperature controller, recording device, containers (pans, crucibles) inert to the specimen, and high-purity (99.99 %) nitrogen supply for purge gas.
ASTM E1641-13 test method determines the kinetic parameters, Arrhenius activation energy, and pre exponential factor by thermogravimetry. ASTM E1641-13 test method is based on the assumption that the decomposition obeys first-order kinetics by using the Ozawa/Flynn/Wall conversational method. ASTM E1641-13 test method is generally applicable to materials with well-defined decomposition profiles occurring in the range from 400 to 1300K (nominally 100 to 1000°C).
ASTM E1641-13 test method consists of heating a series of four or more test specimens, taken from the original sample, each at a different heating rate between 1 and 10 K/min, through their decomposition region. The specimen mass is recorded continuously as a function of temperature. The temperatures for constant conversion are determined from the resultant mass loss curves. The Arrhenius activation energy is then determined from a plot of the logarithm of heating rate versus the reciprocal of the absolute temperature at constant conversion level. This activation energy may then be used to calculate thermal endurance.
Powdered or granular specimens, which have a high surface-to-volume ratio, are preferred in ASTM E1641-13 test method.
In ASTM E1641-13 test method, the glass transition temperature is calculated using the following equation:-
y = ∆ log β,
x = 1/T,
δm = uncertainty in the value of m,
m = n∆ (log β)/∆ (1/T),
n = number of individual sets of x and y data,
xi = an individual x data point,
yi = an individual y data point,
∑ = mathematical function equivalent to “sum of all,”
δyi = the uncertainty in an individual y value and is given
by, and δyi = yi − (m × xi − b)
ASTM E1641-13 provides details about the test method for measurement of the Decomposition Kinetics by Thermogravimetry.
ASTM E572 test method covers the analysis of stainless and alloy steels by Wavelength Dispersive X-ray Fluorescence Spectrometry (WDXRF). It provides rapid, multi-element determinations with sufficient accuracy to assure product quality.
The ASTM D2674 test is a standard test method for the analysis of sulfochromate etch solutions used in the surface preparation of aluminum. The ASTM D2674 standard specifies a method for determining the efficacy of an etchant used to prepare the surface of aluminum alloys for subsequent adhesive bonding.
An immunological method for quantization of Hevea Natural Rubber (HNRL) proteins using rabbit anti-HNRL serum. Rabbits immunized with HNRL proteins react to the majority of the proteins present, and their sera have the capability to detect most if not all the proteins in HNRL.
ASTM G65 measures the resistance of metallic materials to abrasion using the dry sand/rubber wheel apparatus. The quality, durability, and toughness of the sample are determined using this test. Metallic materials are ranked in their resistance to scratching abrasion under a controlled environment.
ASTM E2141 test methods provide accelerated aging and monitoring of the performance of time-dependent electrochromic devices (ECD) integrated in insulating glass units (IGU). This test helps to understand the relative serviceability of electrochromic glazings applied on ECD.
ASTM C724 test method is used in analyzing the quality and ease of maintenance of a ceramic decoration on architectural-type glass. This test method is useful in the acknowledgment of technical standards.
Send us a request
Process for testing
You share material and testing requirements with us
We ensure your sample pick-up in an ensured manner
We deliver test report to your inbox
Just share your testing requirements and leave the rest on us!
Free, no-obligation consultation
Quick turnaround time
Let us combine our capabilities to achieve success!!