Within the last year
Within the past 3 years
1 - 10 of 62 articles
Annealing of single crystals and of single‐crystal cakes of polyethylene leads to an increase in density because the growth of crystal thickness with time reduces the area of the density deficient surface regions. When the same process is applied to the isothermal crystallization and to the...
The morphological changes accompanying the dissolution of polyethylene single crystals in solvent have been correlated with the temperature of annealing. By this method, the solution temperatures of crystals of finite thicknesses were accurately determined. Based on these results, a surface free...
The conversion of electromagnetic power into spin‐wave power and vice versa is investigated from a theoretical point of view. The analysis applies to a rod of ferromagnetic material whose two ends are each in a resonant cavity that is connected to a waveguide. The dc magnetic field is assumed...
For many polymers an effective glass transition T g ′ T g ′ can be defined via a change in slope of logσΩ −1 cm −1 vs T −1 °K −1 . Measurements for dry cellulose acetate (CA), previously doped by soaking (48 h) in 0.1 M alkali‐chloride solutions, indicate that T g ′ T g ′...
A method for visual observation and photographic recording of electron beams that involves the dropping of fluorescent powder through the beam is illustrated by photographs of convergence in Pierce guns, an electron beam profile, and electron trajectories in an Einzel lens. It has the following...
Spontaneous and stimulated emission from junctions in diodes made of silicon‐doped, melt‐grown GaAs x P 1− x alloys have been studied. Variations of the emission spectra as a function of current and of composition ranging up to 40 mole % GaP were examined both at room temperature and 77°K.
The scattering of light from crystalline polyolefins results principally from a correlation in crystal orientation described by an empirical Debye‐Bueche correlation function f ( r )=exp(− r∕a ) for crystals separated by distance r . A one‐dimensional theory is developed in which...
Wave energy moving faster than the phase velocity of the wave in the medium becomes negative. Such a wave field can equally well be treated as an ensemble of quanta with negative energy. Amplification of waves by mode coupling is represented by pair creation of a negative quantum and a positive...
The tensile strength and ultimate elongation properties of any given amorphous elastomer can be described by a characteristic failure curve. It is shown in this paper that the failure curve can be predicted from a knowledge of the creep curve of the elastomer together with the data from a...
Read and print from thousands of top scholarly journals.
Sign up with Facebook
Sign up with Google
Already have an account? Log in
Save this article to read later. You can see your Read Later on your DeepDyve homepage.
To save an article, log in first, or sign up for a DeepDyve account if you don’t already have one.
Sign Up Log In
To subscribe to email alerts, please log in first, or sign up for a DeepDyve account if you don’t already have one.
To get new article updates from a journal on your personalized homepage, please log in first, or sign up for a DeepDyve account if you don’t already have one.