Stability over a Broad Temperature Range

Some silicone polymers have thermal stability at both higher and lower temperatures than organic polymers such as polyurethane and polyethylene. 

Methylmethoxysilane-dimethyldimethoxysilane gels are also stable in a broad temperature range. No change can be observed in the FTIR spectra, mechanical properties, or contact angle of water after heat treatment at 315 °C for 24 h [39]. 

At low temperatures, on the other hand, no obvious glass transition is observed from room temperature to -130 °C by differential scanning calorimetry (DSC). 

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Packaging easy machineability, high strength, dimensional stability over a broad temperature range, crystal clarity, printability, moisture and solvent resistance, barrier against oxygen and water vapor... 

In a final molded part, PET and PBT have exceptionally low moisture absorption and a low coefficient of thermal expansion. This gives them excellent dimensional stability over a broad temperature range. When proper molding controls are implemented, PET and PBT parts can be molded with exceptional precision. This makes them excellent candidates for miniature electronic components. 

Silicone (polydimethylsiloxane) was selected as the binder due to its mechanical flexibility and thermal stability over a broad temperature range (-79 to 204 °C). Silicone maintains relatively high strain to failure and durability at low temperatures and is utilized in automotive applications due to its high temperature performance. Furthermore, silicone decomposes at a higher temperature than most other flexible polymers and absorbs a considerable amount of energy in the process. Silicone has... 

TEV protease has become one of the most popular proteases for use in separating recombinant proteins from their attached fusion partners because of its stringent sequence specificity and activity over a broad temperature range. The protein can be recombinantly produced in E. coli with a His tag for easy purification and subsequent removal from reaction mixtures.290 304 305 The wild-type enzyme suffers from autoproteolysis, which leads to a truncated form with vastly reduced activity therefore, specific mutants are used that stabilize the protein and increase its catalytic efficiency.288 The enzyme is well studied and its crystal structure has been solved.287 289 306 An additional benefit of TEV protease is that many amino acids are tolerated in the PI position of its recognition site however, efficiency decreases for some amino acids and proline abolishes cleavage.287 Since the PI amino acid will remain on the protein of interest when N-terminal fusions are cleaved off, this does allow some flexibility to match the naturally occurring N-terminus post cleavage. 

The methyl esters of fatty acids with an odd number of carbon atoms in the chain crystallize from the melt in an a-form with a large stability interval. In this respect the odd esters are similar to normal paraffins where odd numbers give a stable a-form over a broad temperature range. 

Many materials do not contain single crystals but a range of crystals of varying stability that melt over a broad temperature range. Typical of these are polymeric systems, including... 

Solid oxide catalysts such as hexaaluminates and perovskites, in which an active metal catalyst is incorporated into a coke-resistant lattice, are effective for liquid hydrocarbon reforming due to their thermal stability over a broad-range of temperature. However, sulfur tolerance of those materials has yet to be demonstrated. 

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