Poly soft flexible/rigid vinyl

Plasticixers arc low-molecular-weight liquids that lower the glass transition temperature of a polymer. A typical example is the use of dioctyl phthalate in poly(vinyl chloride) to convert the polymer from a rigid material to a soft, flexible one. It the glass transition of the two components A and B are known, an estimate can be made of the Tg value of the mixture by one or the other of the equations... 

Poly(vinyl chloride) is one of the largest volume thermoplastics in the world. It is chemically inert and versatile, ranging from soft to rigid products that are available at economic costs. PVC is available in essentially two grades — rigid and flexible. 

Poly (vinyl chloride) (PVC) is one of the most widely used polymers in the world. This polymer is usually plasticized with low or medium molecular weight materials such as dioctyl phthalate, trioctyl phosphate, and poly (propylene glycol) esters. The properties can be finely tuned from rigid to soft and flexible by varying the plasticizer content from a few percent to more than 60%. The largest use is for rigid pipe other uses include window frames, flooring, cable insulation, and other household and construction applications. 

A.3.3.3. Plasticizers and Moisture. The Tg values of polymers are seriously affected by the presence of diluents. Liquid organic plasticizers may be added specifically to lower Tg. The most important example among commercial polymers is poly (vinyl chloride), which can vary from very rigid to soft and flexible products, depending on the plasticizer content. In the case of polar... 

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