Effect of the molecular architecture of graft copolymers on the phase morphology and tensile properties of PS/EVA blends

2007 ◽  
Vol 107 (2) ◽  
pp. 930-938 ◽  
Author(s):  
Bluma G. Soares ◽  
Ana C. F. Moreira ◽  
Alex S. Sirqueira ◽  
Ronilson V. Barbosa ◽  
Renata A. Simão
Keyword(s):  
Tensile Properties ◽  
Graft Copolymers ◽  
Phase Morphology ◽  
Molecular Architecture

Phase Morphology and its Role on Tensile Properties in Ternary Blends of PP/PC/SEBS

2012 ◽  
Vol 02 (04) ◽  
pp. 256-259
Author(s):  
Hadis Goodarzi ◽  
Omid Moini Jazani ◽  
Mohammad Reza Saeb
Keyword(s):  
Tensile Properties ◽  
Phase Morphology ◽  
Ternary Blends

The effects of environmental conditioning on tensile properties of high performance aramid fibers at near-ambient temperatures

2011 ◽  
Vol 45 (11) ◽  
pp. 1217-1231 ◽  
Author(s):  
A. Abu Obaid ◽  
J.M. Deitzel ◽  
J.W. Gillespie ◽  
J.Q. Zheng
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
High Performance ◽  
Extreme Condition ◽  
Molecular Architecture ◽  
Long Term Effects ◽  
Aramid Fibers ◽  
Current Effort ◽  
Environmental Conditioning ◽  
Hygrothermal Conditioning

Aramid and aramid copolymer fibers are used in a wide variety of military and civilian applications; however, the long-term effects of environmental exposure on tensile properties are still not well understood. The current effort investigates the effect of hygrothermal conditioning on the tensile properties of Kevlar® KM2 ®, Twaron®, and the newly available Russian copolymer, Armos® high performance fibers. Moisture uptake studies show that at room temperature, water diffuses more slowly into the copolymer Armos ® (D = 8.7 × 10-13 cm2/s) compared to the Kevlar® KM2® and Twaron® homopolymers (D = 2.16 × 10-12 cm2/s and D = 1.8 × 10 -12 cm2/s, respectively). Tensile properties have been measured for these aramid fibers that have been conditioned in water at 40°C, 60°C, 80°C, and 100°C for periods of 17 and 34 days. For both aramid and aramid copolymer fibers, hygrothermal conditioning did not significantly change fiber tensile properties below 80°C. At the most extreme condition of 100°C, 34 days, aramid fibers showed significant loss of tensile strength (58% for KM2 and 34% for Twaron®), while a reduction in tensile strength of 13% (Armos®) was observed for aramid copolymer (Armos®) fibers. Conditioned fibers exhibited no significant change in mass as a result of the conditioning procedure and FTIR spectroscopy results did not indicate signs of chemical or thermo-oxidative change due to hygrothermal conditioning. These results suggest that in aramid fibers, the primary mechanism of degradation at temperatures between 80°C and 100 °C is due to the ingress and egress of moisture in the highly ordered core structure of the fiber. The presence of water in the intercrystalline regions of the fiber core enable segmental chain motion that can relax tie molecules, alter crystal orientation, and change apparent crystallite size. Because of differences in molecular architecture and phase morphology, the aramid copolymer, Armos®, is less susceptible to degradation of tensile properties under these conditions.

H‐shaped double graft copolymers: Effect of molecular architecture on morphology

1997 ◽  
Vol 107 (16) ◽  
pp. 6460-6469 ◽  
Author(s):  
Chin Lee ◽  
Samuel P. Gido ◽  
Yiannis Poulos ◽  
Nikos Hadjichristidis ◽  
Nora Beck Tan ◽  
...  
Keyword(s):  
Graft Copolymers ◽  
Molecular Architecture

Correlation between alpha phase morphology and tensile properties of a new beta titanium alloy

2017 ◽  
Vol 121 ◽  
pp. 24-35 ◽  
Author(s):  
S. Sadeghpour ◽  
S.M. Abbasi ◽  
M. Morakabati ◽  
S. Bruschi
Keyword(s):  
Titanium Alloy ◽  
Tensile Properties ◽  
Alpha Phase ◽  
Phase Morphology ◽  
Beta Titanium Alloy ◽  
Beta Titanium

Effect of molecular architecture on the phase behavior of fluoroether-functional graft copolymers in supercritical CO2

1997 ◽  
Vol 134 (1-2) ◽  
pp. 285-305 ◽  
Author(s):  
Carole Lepilleur ◽  
Eric J. Beckman ◽  
Hans Schonemann ◽  
Val J. Krukonis
Keyword(s):  
Phase Behavior ◽  
Supercritical Co2 ◽  
Graft Copolymers ◽  
Molecular Architecture

Effect of Molecular Architecture on Phase Behavior of Graft Copolymers

2008 ◽  
Vol 112 (32) ◽  
pp. 9720-9728 ◽  
Author(s):  
Liangshun Zhang ◽  
Jiaping Lin ◽  
Shaoliang Lin
Keyword(s):  
Phase Behavior ◽  
Graft Copolymers ◽  
Molecular Architecture

scholarly journals Effects of Second Phase Morphology on RetainedAustenite Morphology and Tensile Properties in a TRIP-aided Dual-phase Steel Sheet.

1993 ◽  
Vol 33 (7) ◽  
pp. 775-782 ◽  
Author(s):  
Koh-ichi Sugimoto ◽  
Masahiro Misu ◽  
Mitsuyuki Kobayashi ◽  
Hidenori Shirasawa
Keyword(s):  
Tensile Properties ◽  
Steel Sheet ◽  
Dual Phase Steel ◽  
Phase Morphology ◽  
Second Phase ◽  
Dual Phase

Effect of molecular weight and molecular architecture of PMMA on the phase morphology of pseudo-IPN's of PCU/PMMA

1992 ◽  
Vol 25 (26) ◽  
pp. 7334-7337 ◽  
Author(s):  
P. Zhou ◽  
X. Chen ◽  
H. L. Frisch ◽  
Z. Zhu ◽  
J. Rider ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Phase Morphology ◽  
Molecular Architecture
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