Results 271 to 280 of about 4,434,824 (337)

Morphological modification of UHMPE fibers

Polymers for Advanced Technologies, 1994
AbstractUHMPE fibers can display several morphological features, including skin‐core, microfibrillar and shish‐kebab structures. In this work, an attempt was made to eliminate these morphologies by treating the UHMPE in a two‐roll mill, at temperatures ranging from ambient to 145°C.
J. Economy, A. G. Andreopoulos
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Polyimide fibers: Structure and morphology

Journal of Applied Polymer Science, 1979
AbstractPolyimide fibers were prepared by wet spinning of poly(p,p′ ‐diaminodiphenylmethanepyro‐mellitamic acid). Density measurements and x‐ray diffraction studies were carried out to study the structure of the resultant polyimide fibers. Polyamic acid as well as undrawn polyimide fibers were essentially amorphous with two amorphous haloes.
R. N. Goel, A. Hepworth, B. L. Deopura, I. K. Varma, D. S. Varma   +4 more
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A novel biodegradable film from edible mushroom ( F . velutipes ) by product: Microstructure, mechanical and barrier properties associated with the fiber morphology

Innovative Food Science & Emerging Technologies, 2018
In order to efficiently utilize mushroom-processing waste discharge, insoluble fiber (FVIF) from aged Flammulina velutipes stipe was prepared with a series of wet milling steps of colloid mill (CM), PFI, low pressure homogenization (LPH) and high ...
Wenhang Wang, Kai Zhang, Cong Li, Shan Cheng, Jingyang Zhou, Zinan Wu   +5 more
semanticscholar   +1 more source

Morphological characteristics of carbon fibers

Polymer Mechanics, 1977
Scanning electron microscopy has been used to study the surface, before and after thermochemical treatment, and the fracture sites of PAN carbon fibers heat-treated at 2100°C. The fractographs are analyzed in an attempt to estimate the effect of various defects on the strength of PAN carbon fibers.
A. S. Fialkov, N. V. Polyakova, N. V. Bondarenko, V. A. Mikhailova, B. N. Smirnov, S. G. Zaichikov   +5 more
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Polysulfone hollow fibers. II. Morphology

Journal of Applied Polymer Science, 1977
AbstractThe morphology of porous polysulfone hollow fibers which were spun by the dry–wet spinning process is discussed. It was demonstrated that a relatively moderate quenching medium should be employed in the bore of the nascent fiber in order to produce an isotropic fiber free of macrovoids and intrusion cells. A rather delicate quantitative balance
Israel Cabasso, Elias Klein, James K. Smith   +2 more
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Morphology of oriented carbon fibers

Carbon, 1975
Abstract Longitudinal microtome sections were obtained from two specimens of PAN-based commercial carbon fibers using three different cutting directions with respect to the fiber axis orientation. Evidence is presented that secondary features larger than the graphite fibril (i.e.
Z. Mencik, H.K. Plummer, L. Bartosiewicz
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Morphology of man‐made fibers

Journal of Applied Polymer Science, 1968
AbstractRecent advances in electron microscopy of polymer systems have produced new structure theories (lamellar versus micellar) and considerable speculation on the nature of synthetic fiber structure. This paper illustrates what can be seen directly on the structure of nylon 66, polyester, and acrylic fibers with high‐resolution and scanning electron
R. D. Van Veld, G. Morris, H. R. Billica
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Histochemical and morphological characterization of reticular fibers

Histochemistry, 1980
The results presented in this paper show that collagen fibers can be clearly distinguished from reticular fibers using the picrosirius-polarization method. A morphologic and morphometric study of these two types of fibers with electron microscopy shows that reticular fibers are characterized by the smaller diameter of their fibrillar components and the
G S, Montes, R M, Krisztán, K M, Shigihara, R, Tokoro, P A, Mourão, L C, Junqueira   +5 more
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Nascent polypropylene morphology: Polymer fiber

Journal of Polymer Science: Polymer Physics Edition, 1973
AbstractA new morphological structure has been shown to be a general feature of polyolefin powders. This feature is a fiber approximately 0.5 μ in diameter and is common to a large number of samples of polyethylene, ethylene‐propylene copolymer, polypropylene, polybutene‐1, and poly‐4‐methylpentene‐1 samples.
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Effects of Fiber Morphology in Short Fiber Reinforced Composites

International Journal of Polymeric Materials, 1995
Abstract The upper and lower bounds of fiber/fiber interaction effects induced by the different fiber morphologies in a short fiber reinforced composite were studied using an axisymmetric finite element (FE) model that employs a periodic hexagonal array of elastic short fibers embedded in an elastoplastic matrix.
H. G. Kim, D. J. Lee
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