Phase Segregation in Polystyrene—Polylactide Blends
نویسندگان
چکیده
Spun-cast hlms ot polystyiene (PS) blended with polylactide (PLA) weie visualized and chaiacten/ed using atomic foice micioscopy (AFM) and synchtoti on-based X-iay photoemission election micioscopy (X-PEEM) The composition ot the two polymets in these systems was deteimined by quantitative chemical analysis ot neat-edge X-tay absorption signals lecoided with X-PEEM The surface morphology depends on the utio ot the two components, the total polymei concentiation, and the tempeiatuie ot vacuum annealing Foi most of the blends examined PS is the continuous phase with PLA existing in disciete domains oi segiegated to the an—polymei interface Phase segiegation was impioved with furthei annealing A phase invasion occuned when hlms of a 40 60 PS PLA blend (0 7 wt % loading) weie annealed above the glass tiansition tempetatuie (7\) of PLA
منابع مشابه
Polypropylene /Polystyrene in situ nano reinforced blends fiber: Morphology and properties
Polypropylene / polystyrene blends containing montmorillonite (MMT) were prepared using a twin screw extruder followed by fiber spinning. The melt intercalation of PP and PS alloys was carried out in the presence of a compatibilizer such as maleic anhydride-g-polypropylene (MPP). The crystallization morphology, thermal behaviors and mechanical properties of polypropylene/polystyrene (PP/PS) nan...
متن کاملPolypropylene /Polystyrene in situ nano reinforced blends fiber: Morphology and properties
Polypropylene / polystyrene blends containing montmorillonite (MMT) were prepared using a twin screw extruder followed by fiber spinning. The melt intercalation of PP and PS alloys was carried out in the presence of a compatibilizer such as maleic anhydride-g-polypropylene (MPP). The crystallization morphology, thermal behaviors and mechanical properties of polypropylene/polystyrene (PP/PS) nan...
متن کاملMorphology and properties of soy protein and polylactide blends.
Blends of soy protein (SP) and a semicrystalline polylactide (PLA) were prepared using a twin-screw extruder. The melt rheology, phase morphology, mechanical properties, water resistance, and thermal and dynamic mechanical properties were investigated on specimens prepared by injection molding of these blends. The melt flowability of soy-based plastics was improved through blending with PLA. Sc...
متن کاملInterfacial segregation in polymer blends driven by acid-base interactions.
Infrared-visible sum frequency generation spectroscopy (SFG) was used to measure the interfacial concentrations of poly(methyl methacrylate) (PMMA)/polystyrene (PS) blends next to a sapphire substrate. The acid-base interactions of carbonyl groups of PMMA with the hydroxyl groups on the sapphire drive the interfacial segregation of PMMA next to the sapphire substrate. Using the shift of sapphir...
متن کاملRoom to Improve Conjugated Polymer-Based Solar Cells: Understanding How Thermal Annealing Affects the Fullerene Component of a Bulk Heterojunction Photovoltaic Device
We examine how thermal annealing affects the fullerene network in conjugated polymer bulk heterojunction (BHJ) solar cells. We begin by creating electron-only devices with a BHJ geometry by blending the fullerene derivative [6,6]-phenyl-C61-butyric-acid-methyl-ester (PCBM) with polystyrene (PS). These electron-only PS:PCBM diodes function even with a poly(ethylenedioxithiophene):poly(styrenesul...
متن کامل