scholarly journals Microbond multiple fiber pull-out test to evaluate interface properties of UHMWPE/LDPE self-reinforced polymer composites

2021 ◽  
Vol 9 (3A) ◽  
Author(s):  
M Sharan Chandran ◽  
◽  
Yashasvi Chebiyyam ◽  
K Padmanabhan ◽  
◽  
...  
Keyword(s):  
Polymer Composites ◽  
Chemical Structure ◽  
Interfacial Properties ◽  
Interface Properties ◽  
Pull Out ◽  
Reinforced Polymer ◽  
Structural Applications ◽  
Ultra High Molecular Weight ◽  
Efficiency And Reliability ◽  
Better Than

Interfacial properties of composite materials play an important role in overall efficiency and reliability of these materials in structural applications. The objective of this study is to develop a multiple fiber microbond pull-out test to determine the interfacial properties of self-reinforced polymer composites (SRPC) and compare it with single fiber multiple fiber pull-out tests. SRPC possess better interfacial adhesion due to their similarity in chemical structure. The system used in this study is LDPE sheet reinforced with plain weave ultra-high molecular weight polyethylene (LDPE/ UHMWPE). The optimal operating temperature was estimated with DSC and TGA analysis. The micromechanical and meso-mechanical approaches were compared to validate the results. A fractographic study was performed to correlate lamina and meso-mechanical properties found in this study. It was observed that the multiple fiber pullout test explained in this study is on par with or better than the other conventional methods to evaluate interface properties.

Nanomechanical and Nanotribological Properties of Nano- and Micro-Particle Filled Polymer Composites Used for Dental Restorative Applications

2007 ◽  
Author(s):  
D. Devaprakasam ◽  
P. V. Hatton ◽  
G. Moebus ◽  
B. J. Inkson
Keyword(s):  
Polymer Composites ◽  
Filled Polymer ◽  
Shape Distribution ◽  
Micro Particles ◽  
Reinforced Polymer ◽  
Urethane Dimethacrylate ◽  
Microscopy Techniques ◽  
Dental Restorative ◽  
Friction And Wear Characteristics ◽  
Better Than

The objective of this work is to quantify nanomechanical and nanotribological properties of nano- and micro-particles filled polymer composites used for the dental restorative applications. Nanotribological performances of the two polymer composites with different reinforcing particulates were investigated using advanced microscopy techniques. Both the polymer composites composed of same dimethacrylate based monomeric mixture, Bisphenol-A-glycidyldimethacrylate (Bis-GMA), triethylene glycoldimethacrylate (TEGDMA), urethane dimethacrylate (UDMA), as matrix. It was found that the elastic modulus, hardness, particle size, shape, distribution and agglomeration significantly influence the friction and wear characteristics of the polymer composites. The results show that nanotribological performance of nanoparticle reinforced polymer composites is better than the microparticle reinforced polymer composites.

An Enhanced Microstructure-Level Finite Element Machining Model for Carbon Nanotube-Polymer Composites

2015 ◽  
Vol 137 (2) ◽  
Author(s):  
Lingyun Jiang ◽  
Chandra Nath ◽  
Johnson Samuel ◽  
Shiv G. Kapoor
Keyword(s):  
Finite Element ◽  
Carbon Nanotube ◽  
Strain Rate ◽  
Cutting Force ◽  
Polymer Composites ◽  
Variable Temperature ◽  
Critical Role ◽  
Surface Damage ◽  
Interfacial Properties ◽  
Pull Out

During the machining of carbon nanotube (CNT)-polymer composites, the interface plays a critical role in the load transfer between polymer and CNT. Therefore, the interface for these composites has to be explicitly considered in the microstructure-level finite element (FE) machining model, so as to better understand their machinability and the interfacial failure mechanisms. In this study, a microstructure-level FE machining model for CNT-polymer composites has been developed by considering the interface as the third phase, in addition to the polymer and the CNT phases. For the interface, two interfacial properties, viz., interfacial strength and fracture energy have been included. To account for variable temperature and strain rate over the deformation zone during machining, temperature and strain rate-dependent mechanical properties for the interface and the polymer material have also been included in the model. It is found that the FE machining model predicts cutting force within 6% of the experimental values at different machining conditions and CNT loadings. The cutting force data reveals that the model can accurately capture the CNT pull-out/protrusion, and the subsequent surface damage. Simulated surface damage characteristics are supported by the surface topographies and roughness values obtained from the machining experiments. The study suggests that the model can be utilized to design the new generation of CNT-polymer composites with specific interfacial properties that minimize the surface/subsurface damage and improve the surface finish.

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