Polymer Morphology and Deformation Behavior

Hara, M.

doi:10.1002/9781118892756.ch18

Cited by 2 publications

(1 citation statement)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The amorphous and crystalline orientation parameters were utilized to estimate the degree of orientation of the amorphous and crystalline components, as well as the formation of fibrils. [53,54] The deformation configuration relevant for measuring the degree of stiffness and aspect ratio of fibrils during the drawing process is assumed to be the degree of orientation of the polymer's amorphous-crystallite phase. The orientation parameters were measured using the amorphous and crystalline orientation models at a drawing ratio of 8, where A i = Area of undrawn strands, A f = Area of drawn strands during drawing, as illustrated in Equations ( 1) and ( 2).…”

Section: Theoretical Study Of Orientation Parameter During Drawing Fo...mentioning

confidence: 99%

Graphene Nanoplatelets/Barium Titanate Polymer Nanocomposite Fibril: A Remanufactured Multifunctional Material with Unprecedented Electrical, Thermomechanical, and Electromagnetic Properties

Mishra,

Goel,

Chianella

et al. 2023

Advanced Sustainable Systems

View full text Add to dashboard Cite

A novel, zero‐waste and recycling plastic waste solution is introduced, to scalably produce graphene nanoplatelets/barium titanate (GNP/BaTiO3) polymer nanocomposite fibrils. A comprehensive investigation is performed to evaluate the compatible and non‐compatible recycled polypropylene (PP)/polyethyleneterephthalate (PET) blends combined with functional (electrical, piezoelectric,and dielectric) materials for in‐situ fibril production. The nanocompositefibrils made from recycled PP, PET and GNPs/BaTiO3 with high‐aspect ratio disparity (400:1) are produced, which exhibit significantly enhanced electrical, thermomechanical, and electromagnetic characteristics. Single‐screw extrusion is utilised to fabricate the fibrils with the in‐situ fibril morphology of PET and GNPs/BaTiO3 leading to improved electrical conductivity. It is demonstrated that such fibril morphology restricts the chain mobility of polymer molecules, and ultimately increases viscosity and strain energy. Moreover, the study demonstrates a positive reinforcement effect from the utilisation of PET fibrils and GNPs/BaTiO3 in a PP matrix, dominated by the high‐aspect ratio, stiffness, and thermal stability of GNPs/BaTiO3. Furthermore, it is observed that the mechanical properties and tension‐bearing capacity of the PP are significantly improved by such incorporation. The study also demonstrates that the protection of the remanufactured nanocomposites against electromagnetic interference is significantly improved with the increasing GNPs/BaTiO3 content and the morphological transition from spherical to fibril‐shaped PET.

show abstract

Section: Theoretical Study Of Orientation Parameter During Drawing Fo...mentioning

confidence: 99%

Graphene Nanoplatelets/Barium Titanate Polymer Nanocomposite Fibril: A Remanufactured Multifunctional Material with Unprecedented Electrical, Thermomechanical, and Electromagnetic Properties

Mishra,

Goel,

Chianella

et al. 2023

Advanced Sustainable Systems

View full text Add to dashboard Cite

show abstract

Strain hardening and shock mitigation response of polyurethane under high strain rates

et al. 2021

View full text Add to dashboard Cite

Polyurethane is a promising candidate for the potting of embedded electronics due to its shock absorbing properties. This paper discusses the less known strain hardening and shock mitigation properties of 4,4′-methylenediphenyl diisocyanate based polyurethane under dynamic loading. This study is reported in a strain rate range of 1600–2900 s−1 under compression using a split-Hopkinson pressure bar (SHPB). The experimental stress–strain behavior of polyurethane was modeled with Hollomon’s equation to analyze its hardening behavior in dynamic environments. Jointly, the incident, reflected, and transmitted strain signals of the SHPB are analyzed in time and frequency domains to understand the shock absorbing properties of polyurethane. Polyurethane was found to absorb more shock for more intense loading. It was observed to mitigate 81% of shock energy with frequencies up to 10 kHz.

show abstract

Polymer Morphology and Deformation Behavior

Cited by 2 publications

References 37 publications

Graphene Nanoplatelets/Barium Titanate Polymer Nanocomposite Fibril: A Remanufactured Multifunctional Material with Unprecedented Electrical, Thermomechanical, and Electromagnetic Properties

Graphene Nanoplatelets/Barium Titanate Polymer Nanocomposite Fibril: A Remanufactured Multifunctional Material with Unprecedented Electrical, Thermomechanical, and Electromagnetic Properties

Strain hardening and shock mitigation response of polyurethane under high strain rates

Contact Info

Product

Resources

About