Dynamic light scattering of polyethylene. II. Results and interpretation

Abstract

Dynamic light‐scattering measurements are reported for a medium‐density and a low‐density polyethylene. It is found that the scattering at small angles can be described in terms of the deformation of spherulites, whereas that at larger angles depends upon rearrangements of partially ordered crystals within the spherulites.

Features of structure formation and electrophysical properties of poly(vinylidene fluoride) crystalline ferroelectric polymers

“…The particles' micrometer size was observed by small‐angle polarized light scattering. The average radius ( R ) of the spherulites was obtained at the scattering pattern (between crossed polarizers) from a ratio:48 where λ is the wavelength in the medium and θ m is the radial scattering angle corresponding to the maximum intensity. To measure the switching of polarization, the aluminum electrodes (100 nm thick) were evaporated onto the samples.…”

ADMET Modeling of Branching in Polyethylene. The Effect of a Perfectly-Spaced Methyl Group

“…It can be synthesized by many routes, including free radical initiation and heterogeneous Ziegler−Natta catalyzed polymerization, , and more recently using metallocene-based catalyst systems. , Each of these polymerization techniques operates through chain propagation chemistry, and as a consequence, chain transfer events lead to varying degrees of branching. Branching has a significant influence on the physical properties of polyethylene and similar materials, − and to date it has been difficult to study the effects of branching in a systematic manner.…”

“…4,5 Each of these polymerization techniques operates through chain propagation chemistry, and as a consequence, chain transfer events lead to varying degrees of branching. Branching has a significant influence on the physical properties of polyethylene and similar materials, [6][7][8][9][10][11][12][13][14][15][16][17][18][19] and to date it has been difficult to study the effects of branching in a systematic manner.…”

Recent Advances in Rheo-Optical Studies of Polymers in the Solid State

“…This will not be the case if, for example, voids open and close during the deformation. For a two-phase system containng a volume fraction Vv of voids, eq 7 may be generalized to give (8) (Note that dv = 0). Thus, if Vv changes with deformation, Q will change.…”