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Laser light scattering characterization of segmented copolymer: poly(ethylene terephthalate-co-caprolactone).January 1995 (has links)
by Woo Ka Fai. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1995. / Includes bibliographical references (leaves 61-63). / Abstract --- p.i / Acknowledgment --- p.ii / Contents --- p.iii / Abbreviations --- p.iv / List of Figures --- p.vii / List of Tables --- p.ix / Chapter 1 --- Introduction --- p.1 / Chapter 2. --- Theoretical background / Chapter 2.1 --- Static light scattering for homopolymer --- p.5 / Chapter 2.2 --- Static light scattering for copolymer --- p.16 / Chapter 2.3 --- Dynamic light scattering --- p.19 / Chapter 2.4 --- Modified method for copolymer --- p.28 / Chapter 3. --- Experimental / Chapter 3.1 --- Preparation of PET-PCL --- p.31 / Chapter 3.2 --- Preparation of solution for LLS --- p.31 / Chapter 3.3 --- Refractive index increment measurement --- p.32 / Chapter 3.4 --- Laser light scattering instrumentation --- p.35 / Chapter 4. --- Results and Discussion --- p.36 / Chapter 5. --- Conclusion --- p.60 / Chapter 6. --- References --- p.61
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Thermal aspect of stereolithography moldsLeBaut, Yann P. 05 1900 (has links)
No description available.
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Modeling and characterization of interfacial adhesion and fractureYao, Qizhou 05 1900 (has links)
No description available.
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The fatigue behavior of porous polysulfone coatings for orthopaedic applicationsBeals, Neil Bradley 05 1900 (has links)
No description available.
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Post-build processing of stereolithography moldsBlair, Bryan Micharel 05 1900 (has links)
No description available.
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Thermomechanical properties of polymers at high rates of strainTrojanowski, Albin S. January 1997 (has links)
-1 were achieved when testing specimens and this rate was obtained using a split Hopkinson pressure bar. A substantial number of preliminary tests were conducted in order to obtain a suitable specimen size which was then used in the temperature measurement process. Quasistatic, intermediate and high strain-rate tests were performed; the last utilised the radiometer for temperature measurement. An Eyring plot was constructed from which fundamental values for activation volumes and enthalpies were obtained. Full descriptions of the testing techniques used have been included and a brief photoelastic analysis has been carried out on a partially deformed specimen which shows molecular alignment.
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Morphological and mechanical characteristics of injection molded blends of poly(ethylene terephthalate) and poly(amide - 6,6)Sahto, Mohammad Aslam. January 1983 (has links)
No description available.
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Rapid production of polymer microstructuresNagarajan, Pratapkumar. January 2008 (has links)
Thesis (Ph.D)--Polymer, Textile and Fiber Engineering, Georgia Institute of Technology, 2009. / Committee Chair: Dr. Donggang Yao; Committee Member: Dr. John.Muzzy; Committee Member: Dr. Karl Jacob; Committee Member: Dr. Wallace W. Carr; Committee Member: Dr. Youjiang Wang. Part of the SMARTech Electronic Thesis and Dissertation Collection.
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Investigating the behaviour of FRP strengthened reinforced concrete beams under torsion /Ameli, Mehran. January 2005 (has links) (PDF)
Thesis (Ph.D.) - University of Queensland, 2005. / Includes bibliography.
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Investigation of the mechanical properties and behaviour of hybrid polymer composites embedded with shape memory alloysAyodele, Olukayode Lawrence January 2008 (has links)
Thesis submitted in fulfilment of the requirements for the degree
Magister Technologiae: Mechanical Engineering
in the Faculty of Engineering
at the Cape Peninsula University of Technology
2008 / The increasing requirement for light weight constructions and the unsatisfactory performances of
traditional metals and conventional engineering materials, especially in their failure to positively
respond to environmental stimuli, in a demanding environment have made the search for the
development of alternative materials inevitable. Such alternative materials being sought, which
are the so-called adaptive, multifunctional, smart or intelligent composites would facilitate the
realization of some engineering applications that are simply difficult to achieve with the existing
conventional materials.
Composite materials have found increasing applications in construction, aerospace and
automotive industries due to their good characteristics of light weight, improved strength,
corrosion resistance, controlled anisotropic properties, and reduced manufacturing and
maintenance costs. However, there is a growing demand to improve on composite materials to
have “smart" capabilities so as to be able to sense, actuate and respond to the surrounding
environment.
Shape memory alloys (SMAs) are metallic alloys that can undergo martensitic phase
transformations as a result of applied thermomechanical loads and are capable of recovering
permanent strains when heated above a certain transformation temperature. SMAs possess
sensing and actuating functions and have the potential to control the mechanical properties and
responses of their hosts due to their inherent unique characteristics: shape memory effect (SME)
and pseudoelasticity. When integrated into structural components, they perform sensing,
diagnosing, actuating and repair or healing functions, thereby enhancing improved performance
characteristics of their hosts. Amongst the commercially available SMAs, NiTi (Nickel-Titanium)
alloys in forms of wires, ribbons, bars, particles and porous bulks are the most widely used
because of their excellent mechanical properties and superior material characteristics.
Embedding SMAs into composite materials can create smart or intelligent hybridized
composites.
This thesis details an investigation of the mechanical properties and behaviour of the hybridized
composites formed by embedding NiTi SMA wires into 60D polyurethane. The composites were
produced by the vacuum process of manufacturing. The properties of the implanted SMA wires
were enhanced by ageing and pre-straining. Uniaxial tensile and four point bending tests were
conducted to ascertain the significance of embedding SMA wires into the polyurethane host
matrix. It was found that the embedded SMA results in an increasing in elastic modulus, tensile
strength and bending stiffness. It was found that these improvements in the properties can not
be sustained at high temperature owing to degradation of interfacial strength between the SMA
and polyurethane as a result of the high recovery stress generated by the SMA upon activation.
Some measures that can ameliorate the interfacial breakdown were suggested.
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