Shear controlled orientation injection molding SCORIM

Shear controlled orientation injection molding (SCORIM) is a novel technique for establishing the alignment of polymer molecules and fiber reinforcements in molded p arts. S olid-state properties, which are highly dependent on molecnlar and additive alignment, can be improved through the use of controlled orientation. 

Modified processing techniques have been useful for thermoplastic starch polymers. Recent work [45, 46] has examined the use of coextruded sheet processing to produce polyester / thermoplastic wheat starch / polyester multilayer films. They found that adhesion strength between the layers and stability of the interface were crucial properties in controlling the final performance properties of the films. Work by Sousa [47] has examined use of the novel shear controlled orientation injection molding (SCORIM) process to control morpholoiges and provide tensile property increases of thermoplastic starch/synthetic blends. 

When the PP is subjected to shear-controlled orientation injection molding (SCORIM), the molecular orientation may be enhanced, resulting in a self-reinforced molding. For example, by the SCORIM method, moldings of improved stiffness (by 75%) can be obtained [3] - see the related chapter in this book. 

Single Polymer Composites via Shear Controlled Orientation Injection Molding (SCORIM) or Oscillating Packing Injection Molding (OPIM) Techniques... 

The conventional injection molding of polypropylene is introduced in the related chapter. This chapter extends the subject of injection molding of polypropylene with the addition of shear-controlled orientation in injection molding (SCORIM), which has proved to be an excellent way of managing the morphology and hence the physical properties of polypropylene [1, 2]. 

Keywords injection molding, SCORIM, structure-propjerty relationships, shear-controlled orientation, molecular orientation, SCORIM pistons, impact strength. Young s modulus, shish-kebab morphology, y-phase, a-phase, p-phase. X-ray diffraction. 

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