Theses and Dissertations from UMD

Permanent URI for this communityhttp://hdl.handle.net/1903/2

New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a give thesis/dissertation in DRUM

More information is available at Theses and Dissertations at University of Maryland Libraries.

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    Milligram-scale Flame Calorimetry: Novel Design of a Pyrolyzer System Used to Emulate the Burning Behavior Exhibited by Coupon-sized Cone Calorimetry Samples
    (2020) De Beer, Jacques Andre; Stoliarov, Stanislav I; Fire Protection Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    Milligram-scale Flame Calorimetry (MFC) is a controlled-atmosphere flammability technique used to screen fire retardant materials which do not intumesce. The MFC is a desirable technique due to its calorimetry capabilities, small sample size requirement and allowance for the non-intrusive study of an axisymmetric laminar diffusion flame. In in this work, a new MFC pyrolyzer system was developed to emulate the burning behavior of cone calorimetry samples, improving upon the limited use of the MFC. The new pyrolyzer system enables the testing of 30 – 55 mg samples as well as intumescent charring materials. The material surface temperature is directly measured during a test, which was previously not possible. A comparative study of five representative materials, covering a wide range of sooting and charring conditions, is conducted considering the new MFC, along with Microscale Combustion Calorimetry and cone calorimetry. It is concluded that the new MFC can be used to rank flammability of a wide range of polymeric materials and this ranking is the same at that obtained through cone calorimetry testing.