Dynamics of poly(ethylene oxide) chains in water
نویسندگان
چکیده
منابع مشابه
Chemical Dynamics of Monodispersed Iron Oxide Nanoparticles
This study is comprised of the synthesis and characterization of uniform fine particles of iron oxide in different shapes and sizes. Varying amounts of iron (III) chloride and sodium dihydrogen phosphate was heated at 98 oC for various periods, following the forced hydrolysis method. Scanning electron microscopic analysis showed that the shape and size of the precipitated particl...
متن کاملAnomalous heat conduction in polyethylene chains: Theory and molecular dynamics simulations
In 1955 Fermi, Pasta, and Ulam showed that a simple model for a nonlinear one-dimensional chain of particles can be nonergodic, which implied infinite thermal conductivity. A more recent investigation of a realistic model for an individual polyethylene chain suggests that this phenomenon can even persist in real polymer chains. The reason for the divergent behavior and its associated mechanism,...
متن کاملthe study of bright and surface discrete cavity solitons dynamics in saturable nonlinear media
امروزه سالیتون ها بعنوان امواج جایگزیده ای که تحت شرایط خاص بدون تغییر شکل در محیط منتشر می-شوند، زمینه مطالعات گسترده ای در حوزه اپتیک غیرخطی هستند. در این راستا توجه به پدیده پراش گسسته، که بعنوان عامل پهن شدگی باریکه نوری در آرایه ای از موجبرهای جفت شده، ظاهر می گردد، ضروری است، زیرا سالیتون های گسسته از خنثی شدن پراش گسسته در این سیستم ها بوسیله عوامل غیرخطی بوجود می آیند. گسستگی سیستم عامل...
Molecular dynamics simulation of reorientation of polyethylene chains under a high magnetic field
The purpose of this investigation is to clarify the dynamical process of reorientation of a polyethylene chains under high magnetic fields. Molecular dynamics (MD) simulations at constant temperature and pressure are carried out to study the reorientation of two polyethylene chains with different configurations. We utilized static homogeneous external magnetic fields of 25 T into the velocity V...
متن کاملBehavior of bound water in polyethylene oxide studied by DSC and high-frequency spectroscopy.
Measurements of DSC, NMR and high-frequency spectroscopy have been done on PEO-H2O and PEO-H2O-HQ mixed systems. DSC measurements show that water molecules contained in PEO are divided roughly into two species: freezable water and non-freezable water. By 1H-NMR measurements, PEO and H2O protons show an absorption peak around 3.6 ppm and 4.5 ppm, respectively. All the PEO-H2O samples containing ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Polymer
سال: 1986
ISSN: 0032-3861
DOI: 10.1016/0032-3861(86)90188-6