The overall goal of this research was to explore new living radical polymerization methods and the blending of renewable polymers. Towards this latter goal, polylactic acid (PLA) was blended with a new renewable polymer, poly(trimethylene-malonate) (PTM), with the aim of improving mechanical properties, imparting faster degradation, and examining the relationship between degradation and mechanical properties. Blend films of PLA and PTM with various ratios (5, 10, and 20 wt %) were cast from chloroform. Partially miscible blends exhibited Young’s modulus and elongation-to-break values that significantly extend PLA’s usefulness. Atomic force microscopy (AFM) data showed that incorporation of 10 wt% PTM into PLA matrix exhibited a Young’s modulus of 4.61 GPa, which is significantly higher than that of neat PLA (1.69 GPa). The second part of the bioplastics study involved a one-week hydrolytic degradation study of PTM and another new bioplastic, poly(trimethylene itaconate) (PTI) using DI water (pH 5.4) at room temperature, and the effects of degradation on crystallinity and mechanical properties of these films were examined by differential scanning calorimetry (DSC) and AFM. PTI showed an increase in crystallinity with degradation, which was attributed to predominately degradation of free amorphous regions. Depending on the crystallinity, the elastic modulus increased at first, and decreased slightly. Both bulk and surface-tethered stimuli-responsive polymers were studied on amine functionalized magnetite (Fe3O4) nanoparticles. Stimuli-responsive polymers studied, including poly(N-isopropylacrylamide) (PNIPAM), poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA), and poly(itaconic acid) (PIA), were grafted via surface-initiated aqueous atom transfer radical polymerization (SI-ATRP). Both Fourier transform infrared spectroscopy (FTIR) and x-ray photoelectron spectroscopy (XPS) spectroscopies showed the progression of the grafting. The change in particle size as a function of temperature was measured using dynamic light scattering (DLS). Once the PIA was grafted from the Fe3O4 nanoparticles for 13 h, the PIA thickness was around 13 nm. After the PNIPAM was grafted for 6 h, the stimuli-responsive nanocomposites with a lower critical solution temperature (LCST) of 32 °C exhibited a particle size of 236 nm. Moreover, a variety of stimuli-responsive bulk block copolymers were synthesized. The stimuli-responsive nanocomposites could be good candidates as drug carriers for the targeted and controllable drug delivery.

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This thesis investigates the suitability of thermo-kinetically recycled plastics for use in commercial product applications using finite element analysis and statistics. Different recycled material blends were tested and evaluated for their use in commercial product applications. There are six different blends of thermo-kinetically recycled plastics used for testing and CATIA is used for finite element analysis. The different types of thermo-kinetically recycled plastics blends are: pop bottles made of PolyethyleneTeraphthalate (PET), milk jugs made of High-Density Polyethylene (HDPE), Vinyl seats made of Poly Vinyl Chloride (PVC) and small amount of Polypropylene (PP) and Urethane, electronic scrap made of engineering resins like Acrylo-Nitrile-Butadiene Styrene (ABS), Polystyrene (PS) and Polycarbonate (PC), agriculture waste consisting of Low Density Polyethylene (LDPE), industrial waste consisting of Nylon (PA66) and PolyethyleneTeraphthalate (PET), household waste consisting of Polystyrene (PS). The methods employed during the study include three phases for each of six blends available: 1.Density, tensile and impact testing of each blend 2.Correlation of mechanical properties to blend 3.Finite element analysis of the service performance of a product made from each thermo-kinetically recycled plastic blend This thesis shows that some of the recycled plastics materials that were tested are qualified to be used in the pallet. Those materials that qualified were Industrial waste consisting of Nylon and PolyethyleneTeraphthalate, household waste consisting of Polystyrene.

I denna uppsats undersöks franska mots-valises, motsvarande teleskopord på svenska, och deras betydelse. Ett teleskopord består av två eller flera ord som slagits samman. Orden som utgör teleskopordet, les mots sources (källorden) har på något sätt blivit modifierade. Oftast genom att korta av början eller slutet på orden och foga samman dessa. I denna uppsats undersöks hur betydelsen är fördelad mellan de två orden som utgör teleskopordet. Med hjälp av ett hyponymtest utläses vilket eller vilka av källorden som bidrar mest till teleskopordets totala betydelse (ordets ”semantiska huvud”, la tête sémantique). Resultatet visar att det högra ordet ofta fungerar som semantiskt huvud. Eventuella kopplingar mellan källordens form och semantiska bidrag undersöks. Resultatet visar inte på något sådant samband.

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