In this paper, the humidity influence to the thermal mechanical properties of gelatin capsule was studied systematically using TA Instruments’ Dynamic Mechanical Analyzer with the humidity control unit. The coefficient of hygroscopic expansion (CHE) of the gelatin capsule was also studied at two individual temperatures.
DetailsA lignite coal sample and several petroleum coke samples have been gasified in the new Discovery HP-TGA 75 and 7500 instruments using carbon dioxide and steam as gasifying agents. The evolved gas atmosphere was analyzed with online mass spectrometry to detect the generated syngas components.
DetailsThermogravimetric Analysis (TGA) provides a method for accelerating the lifetime testing of polymers so that short term experiments can be used to predict in-use lifetime.
DetailsIn this Applications note, we demonstrate using TGA to precisely control the degree of degradation to be < 5wt% and characterize the impact of degrees of degradation on polymer thermal properties.
DetailsTo assess how alternative materials perform as compared to traditional plastic materials, dynamic mechanical analysis (DMA) may be used in addition to previously reported tensile, compressive, and hardness methods.
DetailsDSC step annealing is used to study the fine molecular structure of poly(vinylidene fluoride) (PVDF) homopolymers and copolymers. The melting pattern, obtained after step annealing, is a characteristic “fingerprint” for small variations in structure. This “fingerprint” detects variations in the polymerization process, the molecular weight of the polymer, the fraction and the nature of the co-monomer.
DetailsThis note demonstrates the utility of differential scanning calorimeter (DSC) measurements in evaluating the effects of an antagonistic interaction of two common additives that may be found in a mechanical recycle stream of polypropylene (PP).
DetailsOxidative degradation of polymers is an exothermic process (releases heat) and is detectable by differential scanning calorimetry (DSC). Furthermore, DSC evaluation of polyethylene at elevated temperatures in the presence of oxygen is an effective method for accelerating the onset of degradation so that longer term (shelf life) properties can be predicted and/or compared.
DetailsThe blending of two or more polymers is becoming a common method for developing new materials for demanding applications such as impact-resistant parts and packaging films.
DetailsVarious thermal analysis techniques can be used to monitor the cure level in thermosets. Differential scanning calorimetry (DSC), for example, can determine cure level based on the amount of additional curing (with associated heat evolution) that occurs on further heating.
DetailsThis note describes the importance of DSC to study crystallization behavior and crystallinity of recycled PET used in the production of honeycomb structures.
DetailsThis paper utilizes a single run DSC experiment and analysis of the crystallization data using the Avrami equation to obtain a cursory but useful comparison of crystallization characteristics of different colored polypropylene marker caps purchased from an office supply store.
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