Results 151 to 160 of about 28,455 (302)

Single Versus Double Screw Extrusion: Impact on Mechanical Performance and Crack Resistance for a Virgin, Recycled, and Blended Polypropylene

open access: yesPolymer Engineering &Science, EarlyView.
Schematic overview of the study approach and key findings. ABSTRACT To evaluate the influence of extrusion on material performance, three processing methods, single extrusion (1x Ex), double extrusion (2x Ex), and double screw compounding (C), were investigated for virgin polypropylene (vPP), recycled PP (rPP), and a blend containing 10% rPP (rPP10 ...
J. Pötzlbauer   +8 more
wiley   +1 more source

Interplay Between Dispersion, Nucleation, and Crystallization in HDPE/Graphene Nanocomposites Processed Under Thermokinetic Conditions

open access: yesPolymer Engineering &Science, EarlyView.
Thermokinetic processing controls graphene fragmentation and dispersion in HDPE, promoting heterogeneous nucleation and multistep crystallization. The balance between nucleation enhancement and chain mobility restriction governs the final crystalline structure and material performance.
Lucas J. S. Nascimento   +4 more
wiley   +1 more source

Perfectionism and Interpersonal Problems

open access: yesروانشناسی بالینی و شخصیت, 2004
The multiple nature of perfectionism including intrapersonal, interpersonal, and social aspects requires one's high expectations of him or herself and others as well as others high expectations of oneself.
M.A. Besharat
doaj  

Perfectionism

open access: yesComprehensive Psychiatry, 1965
openaire   +2 more sources

An Investigation in Poly (Lactic Acid)‐Cellulose Acetate Composites Used for the Controlled Release of Potassium Fertilizers

open access: yesPolymer Engineering &Science, EarlyView.
Schematic graph of controlled release potassium for plant growth. ABSTRACT Biodegradable polymer–based controlled‐release fertilizers (CRFs) offer an environmentally friendly approach to enhancing nutrient use efficiency while minimizing ecological impacts.
Kaleum Meaney   +10 more
wiley   +1 more source

Effect of Crystal Polymorphism on Elastic Modulus and Hardness of Poly(Butylene 2,6‐Naphthalate) (PBN)

open access: yesPolymer Engineering &Science, EarlyView.
The research provides insight into the mechanical behavior of the high‐performance polyester Poly(Butylene 2,6‐Naphthalate) containing different crystal polymorphs, adjustable by the conditions of melt‐crystallization. ABSTRACT The modulus of elasticity and hardness of poly(butylene 2,6‐naphthalate) (PBN) were investigated at different length scales ...
Mengxue Du   +5 more
wiley   +1 more source

Effects of Annealing on the Thermomechanical Properties and Crystallization Behavior of FDM‐Printed High‐Temperature PLA and Glass Fiber PLA Composites

open access: yesPolymer Engineering &Science, EarlyView.
Overview of the study evaluating the impact of post‐print annealing on the microstructural crystallization and thermomechanical properties of FDM‐printed high‐temperature PLA and glass fiber‐reinforced PLA composites. ABSTRACT Polylactic acid (PLA) combines renewable sourcing and reliable printability with limited stiffness retention near its glass ...
Huseyin Erdem Yalkin, Ayse Nur Ozkan
wiley   +1 more source

Explaining the Model of Depressive Symptoms Based on Perfectionism with the Mediation of Intolerance of Uncertainty in Female University Students [PDF]

open access: yesمجله علوم روانشناختی
Background: Previous studies have indicated that depressive symptoms are a common mental health problem among female university students, and perfectionism plays a significant role in depressive symptoms.
Soolmaz Dehghanidowlatabadi   +2 more
doaj  

Photovoltaic Effect in a III‐IV‐V Compound Semiconductor

open access: yesProgress in Photovoltaics: Research and Applications, EarlyView.
A large reduction of the GaAs band gap is obtained with incorporation of 6.5% Ge during epitaxy without introducing extended defects or composition inhomogeneity. Heterojunction solar cell devices were fabricated with 0.76‐V open circuit voltage and an internal quantum efficiency above 40% at energies below the bandgap of the GaAs emitter.
José M. Ripalda   +13 more
wiley   +1 more source

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