Polymer Synthesis
A polymer refers to any large molecule which consists of repeating sub unit molecules (called monomers), primarily connected in long chains. While the structure of a polymer is basic at its molecular level, the wide variety of polymer properties is due to the diversity of structures, bonding, and composition of the monomer sub units. Examples range from natural polymers such as cellulose and proteins to widely known nylon (polyamides) and Teflon® (polytetrafluoroethylene). New polymers are being continually developed, tailored to meet highly specific application requirements.
Cellulose is a polymer made in plants
Because of the high specificity and repeatability in polymer synthesis that is desired, chemists work to control as many reaction factors as possible. This is often achieved using a closed reaction system, such as a glass reactor. Temperature, pressure, gas concentrations, and other factors can be optimized to create ideal reaction conditions for the desired product. The glass is also chemically inert, preventing unwanted agents leaching from the vessel walls into the reaction chamber. A key piece of equipment to assemble into a glass reactor apparatus is the overhead stirrer. It is necessary for the stirrer to be precise and reliable, delivering the agitation speed at the critical parameters needed for best results.
Caframo’s BDC2010 is an ideal choice for both open and closed reaction conditions. Repeatability is achieved by the digital display of speed, possible from 40‑2010 rpm, and a countdown timer that stops stirring once set time has elapsed. Thorough agitation is possible with the xRx mode, where the stirrer can continuously reverse from one stirring direction to the other for set periods of time. A small footprint to fit in a fume hood, yet enough torque to handle viscosities of 20 000 mPa·s. The Stirlight™ illuminates the reaction vessel directly below, enabling better observation of the reaction’s progress. Use the through shaft feature for quick setup and removal with reactor apparatus.
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