Processing And Characterization Of Shape Memory Polymer Nanocomposites Preprint
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| Author | : |
| Publisher | : |
| Total Pages | : 26 |
| Release | : 2006 |
| Genre | : |
| ISBN | : |
This report was developed under a SBIR contract. Cornerstone Research Group, Inc. (CRG) has demonstrated the feasibility of adding nanoparticulates into their shape memory polymer (SMP) resin systems. Under thermal or other stimuli, SMPs can exhibit a radical change from a rigid polymer to a flexible, elastic state, and then back to a rigid state again. Nanoparticles, including carbon nanofibers and carbon nanotubes, are expected to increase material properties such as electrical conductivity, thermal conductivity, and mechanical properties. CRG has demonstrated this on a lab-scale. For end use purposes, these results must be transitioned to large-scale manufacturing. This paper will discuss the process of transitioning SMP nanocomposites from lab-scale to large-scale production. In order to verify the properties after scale-up, the scaled-up samples of various percent loading of nanoparticles will undergo thorough testing to include, but not be limited to, electrical conductivity, thermal conductivity, and dispersion study in the resin using a scanning electron microscope (SEM).
| Author | : Jishan Luo |
| Publisher | : |
| Total Pages | : 53 |
| Release | : 2019 |
| Genre | : Nanocomposites (Materials) |
| ISBN | : |
| Author | : Ayesha Kausar |
| Publisher | : Elsevier |
| Total Pages | : 318 |
| Release | : 2024-01-22 |
| Genre | : Technology & Engineering |
| ISBN | : 0443185034 |
Shape Memory Polymer derived Nanocomposites: Features to Cutting-Edge Advancements summarizes the up-to-date of fundamentals and applications of the shape memory polymer derived nanocomposites. Design and fabrication of shape memory polymeric nanocomposites have gained significant importance in the field of up-to-date nano/materials science and technology. In recent times, the shape memory polymers and nanocomposites have attracted considerable academic and industrial research interest. This feature book will present a state-of-the-art assessment on the versatile shape memory materials. The flexibility, durability, heat stability, shape deformability, and shape memory features of these polymers have shown dramatic improvements with the nanofiller addition. Appropriate choice of the stimuli-responsive polymer, nanofiller type and content, and fabrication strategies may lead to enhanced physicochemical features and stimuli-responsive performance. Several successful stimuli-responsive effects have been achieved in the shape memory nanocomposites such as thermo-responsive, electro-active, photo-active, water/moisture-responsive, pH-sensitive, etc. Consequently, the shape memory polymer based nanocomposites have found applications in high-tech devices and applications. This book initially offers a futuristic knowledge regarding indispensable features of the shape memory polymeric nanocomposites. Afterwards, the essential categories of the stimuli-responsive polymer-based nanocomposites have been discussed in terms of recent scientific literature. Subsequent sections of this book are dedicated to the potential of shape memory polymer-based nanocomposite in various technical fields. Significant application areas have been identified as foam materials, aerospace, radiation shielding, sensor, actuator, supercapacitor, electronics and biomedical relevance. The book chapters also point towards the predictable challenges and future opportunities in the field of shape memory nanocomposites. Provides the essentials of shape memory polymeric nanocomposites Includes important categories of shape memory nanocomposites Presents current technological applications of shape memory polymers and derived nanocomposite in sponges, aerospace, EMI shielding, ionizing radiation shielding, sensors, actuator, supercapacitor, electronics, and biomedical fields
| Author | : Manpreet Singh |
| Publisher | : |
| Total Pages | : 208 |
| Release | : 2005 |
| Genre | : Composite materials |
| ISBN | : |
| Author | : Rick A. Pollard |
| Publisher | : |
| Total Pages | : 78 |
| Release | : 2012 |
| Genre | : |
| ISBN | : |
The Kentera polymer treatment system was investigated as a potential candidate for improving the properties of polymer nanocomposites. Polymer treatments have the ability to improve dispersion and interfacial bonding of fillers within a polymer matrix. This investigation focused on one particular Kentera polymer and its ability to compatibilize carbon nanotubes with polycarbonate. In this study untreated carbon nanotubes, CNT's, and non-wrapping polymer treated CNT's were mixed with polycarbonate, PC, in order to produce polymer nanocomposites. The nanocomposites were created by diluting 15 wt.% masterbatches into virgin PC, and then compounding them using a Killion single screw extruder. These compounded samples were then pelletized for further processing. Thermal and rheological analysis was performed on the pelletized samples. Differential scanning calorimetry was used to perform the thermal analysis. The results showed the glass transition temperature of the PC was unaffected by the addition of untreated or treated CNT's. The rheological behavior of these nanocomposites was characterized using a capillary rheometer. The results showed that the polymer treatment of the CNT's helped to plasticize the nanocomposites. The rheological data shows a significant decrease in viscosity between the treated and untreated nanocomposites. Also, depending on how the materials are processed for end-use products, such as compression or injection molding, a significant change in rheological behavior is observed between the 0.5 wt.% and 2 wt.% nanocomposites. The pelletized samples were then injection molded into ASTM standard tensile, flex, and impact bars, which were tested according to ASTM standards. The addition of CNT's seemed to only improve the flexural properties of the PC. Also, a shear rate study was conducted using three different injection velocities. This investigated how increasing the shear rate during molding can affect the mechanical properties of the polymer nanocomposites. The results showed that increasing the shear rate did not significantly affect the mechanical properties of either the untreated or treated nanocomposites. Overall, the Kentera polymer treatment supplied minimal mechanical property improvement to the nanocomposites, but did provide very interesting rheological data. This Kentera polymer treatment makes PC-CNT nanocomposites easier to process by lowering the viscosity of the PC matrix.
| Author | : A. KAUSAR |
| Publisher | : VCH |
| Total Pages | : 350 |
| Release | : 2022-05-25 |
| Genre | : |
| ISBN | : 9783527348916 |
| Author | : Rajesh Kumar Verma |
| Publisher | : CRC Press |
| Total Pages | : 0 |
| Release | : 2023-09-11 |
| Genre | : |
| ISBN | : 9781032381954 |
Explores synthesis, characterization, properties, fabrication/processing, and application of polymer nanocomposite materials Elaborates polymer manufacturing phase challenges using various control methods and statistical tools and modules Includes machining and micro (μ) machining investigation on the polymer nanocomposites Discusses modeling, simulation and optimization of process parameters during the machining processes and application of additive manufacturing Comprehends the significance of nanomaterials functionalizing synthetic fibrous and bio-compatible composites
| Author | : Vikas Mittal |
| Publisher | : John Wiley & Sons |
| Total Pages | : 379 |
| Release | : 2012-05-07 |
| Genre | : Technology & Engineering |
| ISBN | : 3527654526 |
With its focus on the characterization of nanocomposites using such techniques as x-ray diffraction and spectrometry, light and electron microscopy, thermogravimetric analysis, as well as nuclear magnetic resonance and mass spectroscopy, this book helps to correctly interpret the recorded data. Each chapter introduces a particular characterization method, along with its foundations, and makes the user aware of its benefits, but also of its drawbacks. As a result, the reader will be able to reliably predict the microstructure of the synthesized polymer nanocomposite and its thermal and mechanical properties, and so assess its suitability for a particular application. Belongs on the shelf of every product engineer.
| Author | : Sabu Thomas |
| Publisher | : John Wiley & Sons |
| Total Pages | : 616 |
| Release | : 2016-08-25 |
| Genre | : Science |
| ISBN | : 1118969812 |
Rheology and Processing of Polymer Nanocomposites examines the current state of the art and new challenges in the characterization of nanofiller/polymer interactions, nanofiller dispersion, distribution, filler-filler interactions and interfaces in polymer nanocomposites. A one-stop reference resource for important research accomplishments in this area, it benefits academics, researchers, scientists, and engineers in the field of polymer nanocomposites in their daily work.
| Author | : Bin Xu |
| Publisher | : |
| Total Pages | : |
| Release | : 2011 |
| Genre | : |
| ISBN | : |
The aim of this work is to develop novel shape memory polymers (SMPs) and nanocomposites for potential biological applications. A kind of commercial SMP, shape memory polyurethane (SMPU), was used to prepare nanocomposites by incorporating nano-clay into the SMPU substrate. The mechanical behaviour, thermal property and shape memory efficiency were studied with various nanofiller loadings. Chemical synthesis methods were also employed to prepare the other designable SMP and its nanocomposites, i.e. the shape memory polystyrene co-polymer (SMPS). Multiple technologies were adopted to enhance the SMPS matrix such as modifying the chemical components, introducing various functional nanoparticles into the polymeric network and improving the dispersion of the nanoparticles. Different methods were used to characterize the overall performance of the obtained materials. Mechanical tests were performed at different dimensional scales with a varied degree of localisation. Nanoindentation was firstly applied to assess the micro-mechanical properties of shape memory polymer nanocomposites at scales down to particle size. The micro-mechanical analysis provided the fundamental information on the SMPs and their nanocomposites for bio-MEMS applications. Potential applications were also explored through manufacturing different type of device models and testing their shape recovery efficiencies. Finally, theoretical contributions were made in two areas. The first one was the theoretical analysis on the nanoparticles enhancement to the soft polymeric matrix. The other was in developing a constitutive model to describe the thermo-viscoelastic property and shape memory behaviour for SMP nanocomposites.
