Design of a super‐ductile polypropylene/polycarbonate blend with high heat resistance by using reactive plasticizer

Abstract

High-performance blend of polypropylene (PP) and polycarbonate (PC) has not been explored. The difficulty is caused by the big differences in melt viscosity (PP: low viscosity vs. PC: high viscosity) and polarity (PP: nonpolar vs. PC: polar). We put forth a new approach using a reactive plasticizer which is preferentially soluble with PC and polymerizable by organic peroxide. As the plasticizer, diallyl phthalate and triallyl cyanurate (TAC) were used. By reactive extrusion of PP/PC/plasticizer/dicumyl peroxide (e.g., 80/14/6/0.12 wt. ratio), reaction-induced phase decomposition took place in the dispersed PC particles to develop a regularly phase-separated nanostructure and the graft copolymer of PP and polymerized plasticizer was in situ generated at the interface. The extruded blend showed an excellent ductile behavior with about 500%-elongation at break. TAC was very effective to elevate the heat resistance. Then, a super-ductile PP/PC blend with high heat resistance was successfully developed.

Blends of Renewable Poly(butylene succinate) and Poly(propylene carbonate) Compatibilized with Maleic Anhydride Using Quad Screw Reactive Extrusion

“…According to manufacturers, quad screw extruders (QSE) release less self-generated heat from the materials (which makes them ideal for heat-sensitive polymers) and can extend the residence time of the run (important for reactive extrusion) in contrast to twin-screw extruders. Due to their low-pressure capabilities, the release of volatiles through the venting port is much more efficient. , To the best of our knowledge, only a few researchers have published findings using this machine for the compounding of polymer blends and composites. − …”

Impact of the In Situ Creation of an Epoxy Based Thermosetting Minor Phase on the Physical Properties of a PP Based Blend

“…Actually, the importance of a compatibilizer , and its consequences on the final morphology in nonmiscible polymer blends has been demonstrated in numerous publications. Figure A, without PP- g -MA, shows a larger TS size dispersion with nodules with diameters up to 5 μm.…”

“…Actually, the importance of a compatibilizer 28,29 and its consequences on the final morphology in non-miscible polymer blends has been demonstrated in numerous publications. Mazidi 30 et al, studied the impact of EPDM grafted with maleic anhydride (mEPDM) as a compatibilizer in a PP (matrix)/PA6 blend.…”

Novel Transparent Films Composed of Bisphenol-A Polycarbonate and Copolyester

“…However, PC has disadvantages in flowability due to its high glass transition temperature T g and poor surface hardness. Therefore, PC is often mixed with another polymer species, such as acrylonitrile–butadiene–styrene (ABS) terpolymers [ 4 , 5 , 6 , 7 ], methyl methacrylate–butadiene–styrene (MBS) terpolymers [ 4 , 5 ], poly(lactic acid) [ 4 , 8 , 9 , 10 ], and polypropylene [ 4 , 11 , 12 ], in industry. These polymer blends always lose their transparency because of phase separation.…”