polymer information|Identification of Polymer Blends by Glass Transition Measurements
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polymer information|Identification of Polymer Blends by Glass Transition Measurements
in the development of suitable polymer blends, it is important to discuss a number of different research, development and quality control issues. One main question is mix compatibility. Compatible polymer blends can avoid adverse physical and chemical effects such as:
• premature aging
• cracking and tearing
• Wear
• Removal or decay
• impermeability to natural elements
• chemical attack
Differential Scanning Calorimetry (DSC) is a valuable technique that provides important thermal analysis laboratories Details of the glass transition temperature of polymer blends. The measurement of glass transition of the desired polymer blends can quickly determine their compatibility.
Analyze compatible polymerThe examples described below show how the DSC was used 1 to measure the glass transition temperature of two different polymer blends.
The samples were first cooled from 120 ° C to -140 ° C at 5 K / min and then by heating from -140 ° C to 100 ° C at 10 K / min in a nitrogen atmosphere at 50 ml / min measured to determine the temperature, occurs at the glass temperature. The DSC curves were then performed using the STAR software to examine the compatibility of the blend. The glass transition in Figure 1 is relatively wide and extends over a temperature range of 60K between -110 ° C and -50 ° C. The appearance shows only one glass transition temperature of the polymer blend the polymer components are compatible. The DSC curve shown in Figure 2 shows that two glass transitions are present. The glass transition of NR occurs at -58.8 ° C, while the glass transition temperature of SBR occurs at -44.1 ° C indicating that the polymers are incompatible polymer used in the mixture. The above results show that DSC is observed only one glass transition temperature of compatible polymer blends. Incompatible polymer blends show that the polymer phases as each phase has its own polymer-glass transition are separated. The DSC curves testing laboratories can provide valuable information about the glass transition temperature of polymers in determining the compatibility of polymer blends. The DSC-1 is an excellent tool that provides quick and accurate results over a wide temperature range. It also has the added benefit of an optional sample robot, which allows fully automated measurements performed.METTLER TOLEDO specializes in the area of precision instruments for professional use. METTLER TOLEDO laboratory instruments are used in research, scientific, drug discovery, and quality control labs, amongst many others in the pharmaceutical, chemical, food and cosmetics industries. METTLER TOLEDO comprehensive industrial solutions cover the various steps in a host of manufacturing processes at many of the same customers that laboratory serves. Solutions range from receiving raw materials through various manufacturing processes, in-line process control and end-of-line packaging control, to logistics and shipping. Increasingly, these solutions are fully integrated into the customer’s IT environment, helping automate their workflows. In food retail, our offering for fresh food management ranges from receiving and pre-packaging, to in-store solutions for self-service departments, deli counters, and checkout terminals.
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