Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 120 for “"polymer systems"”.
-
Synthetic Degradable Polymer Systems for Drug Delivery
… polyion complexes (PICs) nanoparticles. Depolymerization of the PICs using two complementary stimuli was demonstrated and the cytotoxicity of the PICs was investigated, followed by preliminary investigations of protein loading. Overall, this thesis introduces new insights and methods that …
-
NMR investigations of ionic host polymer systems
NMR studies of the archetypal ionic host polymer system, in which polyethylene oxide (PEO) forms the polymer host, and lithium trifluoromethanesulphonate (LiCF3S03) is the guest ionic salt, are reported. The work is primarily concerned with the ability of the polymer host to incorporate the guest …
-
Nanoparticles as strengthening agents in polymer systems
… alumoxane nanoparticles and the biodegradable polymer poly(propylene fumarate)/poly(propylene fumarate)-diacrylate (PPF/PPF-DA). For this study, composites were prepared using various functional groups including: a surfactant alumoxane to enhance nanoparticle dispersion into the polymer; an …
-
Colloid phenomena in surface-modified polymer systems.
… and application of techniques to study modified polymer surfaces. Scanning probe microscopy (SPM) is used throughout this work as an experimental platform for the development of advanced techniques for the characterisation of polymer surfaces and adsorbed protein layers. A new method for the …
-
Single molecule studies of flexible polymer systems
Polymeric materials play a profound role in our daily lives. There have been many key advances in polymer processing over the last several decades, but much of the underlying molecular behavior and physics of polymer solutions is not fully understood. Single molecule studies of polymer solutions …
-
Three-Dimensional Optical Characterization of Heterogeneous Polymer Systems
… understand the process-property behavior of polymer systems it is essential to identify the three dimensional structure of the materials fabricated. For heterogeneous polymer systems such as nanoparticle filled systems, determination of the three dimensional optical properties are …
-
Directed-polymer systems explored via their quantum analogs
… statistical mechanics of classical directed polymers in D+1 dimensions is well known to be equivalent to the imaginary-time quantum dynamics of a quantum many-particle system in D spatial dimensions, with polymer con gurations corresponding to particle world-lines. This equivalence motivates …
-
Hypotheses for Scratch Behavior of Polymer Systems that Recover
Scratch recovery is a desirable property of many polymer systems. The reason why some materials have demonstrated excellent scratch recovery while others do not has been a mystery. Explaining the scratch resistance based upon the hardness of a material or its crosslink density is incorrect. In this …
-
Statistical physics of semidilute polymer systems soft billiard systems
… we carefully study the semidilute regime of polymer solutions. The renormalization group (RG) method using the e-expansion has been a systematic method giving good semiquantitative agreement with both real and computer experiments for the static and dynamical properties of polymers in dilute …
-
Evaluation and design of polymer systems for enhanced microwave heating
Microwave heating of different polymer systems (epoxy-amine. polypropylene-iron, carbon-black-filled perfiuoroelastomer) was evaluated using dielectric testing and monitored processing in a multimode microwave cavity. Dielectric measurements were made using a field perturbation technique and a …
-
STUDIES ON STABILIZATION OF PHOTOINDUCED RADICAL IONS IN POLYMER SYSTEMS
本文データは平成22年度国立国会図書館の学位論文(博士)のデジタル化実施により作成された画像ファイルを基にpdf変換したものである
-
Statistical Physics of Semidilute Polymer Systems (And); Soft Billiard Systems
… we carefully study the semidilute regime of polymer solutions. The renormalization group (RG) method using the $\varepsilon$-expansion has been a systematic method giving good semiquantitative agreement with both real and computer experiments for the static and dynamical properties of …
-
Multicomponent network and linear polymer systems: thermal and morphological characterization
Materials comprising of two or more polymeric components have achieved considerable technological significance in the last decade or so due to the unique properties often not attainable in their homopolymeric counterparts. In the present work, two such systemsone involving modified thermosets and …
-
Bioengineering functional polymer systems for glycan-based targeting and drug release
… effects. Existing approaches include liposomes, polymeric miscelle, protein-based nanoparticles, antibody-drug conjugates, dendrimers, and polymer drug conjugates. These systems provide the framework for the addition of additional functionalities, including modalities enabling targeting or …
-
Multi-stage polymer systems for the autonomic regeneration of large damage volumes
… by autonomic regeneration. Although self-healing polymers have the potential to increase material lifetimes and safety, these systems have been limited to recovery of internal microcracks and surface damage. Current technologies thereby fail to address the restoration of large, open damage …
-
An Investigation of the Rheology of Reactive and Nonreactive Highly Filled Polymer Systems
… the measurement of the rheology of highly filled polymer systems that stiffen as they are processed. Lubricated squeezing flow was used to measure the relaxation modulus following a step strain and the steady viscosity in equibiaxial extensional flow, and oscillatory compressional flow was used to …
-
Behavior of externally bonded fiber reinforced polymer systems for strengthening concrete girders in shear
… The use of externally bonded fiber reinforced polymers (FRP) is one such technique that has gained recent recognition for its high strength-to-weight ratio and simplicity of application. The development of this technique relies on experimental testing to better understand the behavior and …
-
Stimuli-Responsive Polymer Systems that Respond to Redox Potential and pH for Controlled Drug Release
… are widely investigated drug delivery systems that can overcome physiological barriers by tuning nanocarrier size, shape, surface chemistry, targeting ligand conjugation, and material composition. Furthermore, they have stimuli-responsive moieties that translate physiological signals, …
-
Application of Semi-Grand Canonical Monte Carlo (SGMC) methods to describe non-equilibrium polymer systems
… specific optical and mechanical properties. In polymers, the ability to easily create orientation through a variety of processes allows the production of materials that, while chemically similar, exhibit a wide variety of optical and mechanical properties. The ability to illuminate the …
-
Interactions of flexible polymers and globular colloids : understanding protein partitioning in two-phase aqueous polymer systems
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1992.
Page 1 of 6