Topic
Thermogravimetry
About: Thermogravimetry is a research topic. Over the lifetime, 12757 publications have been published within this topic receiving 264453 citations. The topic is also known as: Thermogravimetric Analysis.
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TL;DR: In this article, the thermal decomposition of biologically degradable polymer poly(lactic acid) (PLA) was investigated by means of several thermoanalytical techniques: thermogravimetric, differential scanning calorimetry, time resolved pyrolysis-MS and pyrolynsis-GC/MS.
532 citations
TL;DR: In this paper, the effect of nonevaporable water on the strength variation of geopolymers was firstly analyzed and it was shown that it is necessary to keep the strength stable and the optimum content was about 7.4%.
476 citations
TL;DR: In this article, the chemical stability of perovskites LaBO3 where B = V, Cr, Mn, Fe, Co, Ni was studied by thermogravimetry at 1000°C in gas mixtures of CO 2 H 2, O 2 CO 2 and O 2 Ar at 1 bar.
464 citations
TL;DR: In this article, chemical modifications were made to sisal fiber using a urethane derivative of polypropylene glycol (PPG/TDI), maleic anhydride modified polypropylon (MAPP), and KMnO4 in order to improve the interfacial adhesion between the fibre and matrix.
Abstract: The thermal and crystallisation behaviour of sisal/PP composites was studied by thermogravimetry (TG), differential scanning calorimetry (DSC) and polarising optical microscopy. Chemical modifications were made to sisal fibre using a urethane derivative of polypropylene glycol (PPG/TDI), maleic anhydride modified polypropylene (MAPP), and KMnO4 in order to improve the interfacial adhesion between the fibre and matrix. The thermal properties of the blends were analysed by TG analysis. The effects of fibre content and chemical treatments on the thermal properties were evaluated. It was found that treated fibre composites show superior properties compared to the untreated system. DSC measurements exhibited an increase in the crystallisation temperature and crystallinity, upon the addition of fibres to the PP matrix. This is attributed to the nucleating effects of the fibre surfaces, resulting in the formation of transcrystalline regions. On increasing the fibre content, the melting peak of the PP component was shifted to higher temperatures suggesting a constrained melting. The thickness of the transcrystalline layer formed depends on crystallisation temperature and time. The transcrystalline growth rate was slow in the quiescent state. On the other hand, upon the application of stress, transcrystallinity developed quickly. In fact, the shear stress at the polymer/fibre interface initiated the nucleation. Fibre surface modification by PPG/TDI increases the nucleating ability of sisal fibre to a very small extent.
459 citations
TL;DR: In this paper, the authors used X-ray diffraction to study the oxidation of aluminum powders at elevated temperatures and found that the oxide layer thickness exceeds the critical thickness of amorphous alumina of about 4 nm, when the oxide transforms into γ-Al2O3.
455 citations