ACS Macro Letters, 2022 Polymorphism and crystal transition are common phenomena of semicrystalline polymers. These two behaviors are known to be controlled by the nucleation and chain mobility of polymers, both of which are constrained by the chain entanglement at the ...
Lingling Ni +7 more
semanticscholar +1 more source
Computational Predictions for Boger Fluids and Circular Contraction Flow under Various Aspect Ratios
Fluids, 2020 This work puts forward a modeling study contrasted against experimental, with focus on abrupt circular contraction flow of two highly-elastic constant shear-viscosity Boger fluids, i.e., a polyacrylamide dissolved in corn-syrup PAA/CS (Fluid-1) and a ...
J. Esteban López-Aguilar +1 more
doaj +1 more source
Crystallization of Polymers from Solution under ShearingStress III Polybutene-1 [PDF]
, 1968 It was shown that the fibrous crystals of isotactic polybutene-l crystallized from solution under shearing stress are also composed of the central threads with an extended chain character and the epitaxally deposited lamellae with a folded chain ...
Fujiwara, Masahiko +3 more
core +1 more source
Chinese Journal of Polymer Science, 2018 In this work, the crystallization of immiscible polypropylene (PP)/polybutene-1 (PB) blends, in particular the effect of crystal morphology of PP (HTC, high Tm component) on the subsequent crystallization behavior of PB (LTC, low Tm component) was studied.
Yao Xu +3 more
openaire +2 more sources
Effect of the matrix behavior on the damage of ethylene–propylene glass fiber reinforced composite subjected to high strain rate tension [PDF]
, 2012 This study investigates the origin of the strain rate effect on the mechanical behavior of a discontinuous glass fiber reinforced ethylene–propylene copolymer (EPC) matrix composite.
BOCQUET, Michel +2 more
core +6 more sources
Performance of PE pipes under extractive conditions: Effect of the additive package and processing [PDF]
, 2014 Polyethylene (PE) compounds were prepared with five primary antioxidants and five application stabilizers, pelletized and extruded to pipes under industrial conditions. The pipes were stored in water at 80 °C for one year.
Béla Pukánszky +38 more
core +1 more source
How entanglements determine the morphology of semicrystalline polymers [PDF]
, 2023 Crystallization of polymers from entangled melts generally leads to the formation of semicrystalline materials with a nanoscopic morphology consisting of stacks of alternating crystalline and amorphous layers. The factors controlling the thickness of the
Petzold, Albrecht +4 more
core +1 more source
Crystallinity and Stereoregularity of Polybutene-1
Kobunshi Kagaku, 1962 X線回折による結晶化度と密度とを主としてZieglem触媒により合成したポリブテン-1について測定した。結晶化度と比容積との間に直線関係が成立することから, 結晶質と非晶質の密度の値0.950および0, 868が得られた。アイソタクチックポリブテン-1には結晶化バンドとみなしうる吸収が多数見出された。一方, 1221cm-1バンドは固態状態ではその吸光度比の値が比容積と直線関係を示すが溶融状態や溶液で消失しない。したがって固態状態で一定の熱処理をした試料について比較するときには結晶化度の尺度として使用しうると考えられる。吸光度比 (A1221/A1151) と密度 (d) との間には次の実験式が成立する。
Atsuo Nishioka, Kazuo Yanagisawa
openaire +3 more sources
Hybrid core-shell (HyCoS) nanoparticles produced by complex coacervation for multimodal applications [PDF]
, 2017 Multimodal imaging probes can provide diagnostic information combining different imaging modalities. Nanoparticles (NPs) can contain two or more imaging tracers that allow several diagnostic techniques to be used simultaneously.
Bevilacqua, Paolo +5 more
core +1 more source
Low-temperature rheology and thermoanalytical investigation of lubricating oils: Comparison of phase transition, viscosity, and pour point [PDF]
, 2021 According to the ASTM D97, the pour point is the temperature below which petroleum products cease to flow. To evaluate the relevance of pour point measurements for synthetic lubricating oils, we investigated the crystallization, melting temperature and ...
Conrad, Andreas +4 more
core +2 more sources