A generalized scattering data decomposition framework for determining network process–structure–property relationships in polymer materials

2012 ◽  
Vol 64 (1-4) ◽  
pp. 555-577
Author(s):  
Ian Tolle ◽  
Lealon L. Martin
Keyword(s):  
Polymer Materials ◽  
Scattering Data ◽  
Structure Property ◽  
Data Decomposition ◽  
Structure Property Relationships ◽  
Network Process ◽  
Process Structure

Structure-property relationships of PE/PP sandwiched films

1987 ◽  
Vol 45 ◽  
pp. 454-455
Author(s):  
J. Petermann ◽  
G. Broza ◽  
U. Rieck ◽  
A. Jaballah ◽  
A. Kawaguchi
Keyword(s):  
Mechanical Tests ◽  
Polymer Materials ◽  
Ionic Crystals ◽  
Structure Property ◽  
Polymer Systems ◽  
Structure Property Relationships ◽  
Oriented Films ◽  
Materials Used ◽  
Polymer Laminates ◽  
Heated Glass

Oriented overgrowth of polymer materials onto ionic crystals is well known and recently it was demonstrated that this epitaxial crystallisation can also occur in polymer/polymer systems, under certain conditions. The morphologies and the resulting physical properties of such systems will be presented, especially the influence of epitaxial interfaces on the adhesion of polymer laminates and the mechanical properties of epitaxially crystallized sandwiched layers.Materials used were polyethylene, PE, Lupolen 6021 DX (HDPE) and 1810 D (LDPE) from BASF AG; polypropylene, PP, (PPN) provided by Höchst AG and polybutene-1, PB-1, Vestolen BT from Chemische Werke Hüls. Thin oriented films were prepared according to the method of Petermann and Gohil, by winding up two different polymer films from two separately heated glass-plates simultaneously with the help of a motor driven cylinder. One double layer was used for TEM investigations, while about 1000 sandwiched layers were taken for mechanical tests.

scholarly journals Fused Filament Fabrication of PEEK: A Review of Process-Structure-Property Relationships

Polymers ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1665 ◽  
Author(s):  
Ali Reza Zanjanijam ◽  
Ian Major ◽  
John G. Lyons ◽  
Ugo Lafont ◽  
Declan M. Devine
Keyword(s):  
High Performance ◽  
Space Station ◽  
Weight Ratio ◽  
High Strength ◽  
Structure Property ◽  
Fused Filament Fabrication ◽  
Space Applications ◽  
Structure Property Relationships ◽  
Complex Design ◽  
Process Structure

Poly (ether ether ketone) (PEEK) is a high-performance engineering thermoplastic polymer with potential for use in a variety of metal replacement applications due to its high strength to weight ratio. This combination of properties makes it an ideal material for use in the production of bespoke replacement parts for out-of-earth manufacturing purposes, in particular on the International Space Station (ISS). Additive manufacturing (AM) may be employed for the production of these parts, as it has enabled new fabrication pathways for articles with complex design considerations. However, AM of PEEK via fused filament fabrication (FFF) encounters significant challenges, mostly stemming from the semi crystalline nature of PEEK and its associated high melting temperature. This makes PEEK highly susceptible to changes in processing conditions which leads to a large reported variation in the literature on the final performance of PEEK. This has limited the adaption of FFF printing of PEEK in space applications where quality assurance and reproducibility are paramount. In recent years, several research studies have examined the effect of printing parameters on the performance of the 3D-printed PEEK parts. The aim of the current review is to provide comprehensive information in relation to the process-structure-property relationships in FFF 3D-printing of PEEK to provide a clear baseline to the research community and assesses its potential for space applications, including out-of-earth manufacturing.

scholarly journals Yellow electrochromic polymer materials with fine tuning electrofluorescences by adjusting steric hindrance of side chains

RSC Advances ◽  
2017 ◽  
Vol 7 (41) ◽  
pp. 25444-25449 ◽  
Author(s):  
Jian Liu ◽  
Yuchen Shi ◽  
Jingchuan Wu ◽  
Mei Li ◽  
Jianming Zheng ◽  
...  
Keyword(s):  
Steric Hindrance ◽  
External Potential ◽  
Polymer Materials ◽  
Fine Tuning ◽  
Side Chains ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Electrochromic Polymer

A series of novel conducting conjugated yellow-to-transmissive electrochromic (EC) polymers were designed to research their structure–property relationships, achieving electrofluorescent (EF) switching with applied external potential.

Data-driven multi-scale multi-physics models to derive process–structure–property relationships for additive manufacturing

2018 ◽  
Vol 61 (5) ◽  
pp. 521-541 ◽  
Author(s):  
Wentao Yan ◽  
Stephen Lin ◽  
Orion L. Kafka ◽  
Yanping Lian ◽  
Cheng Yu ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Data Driven ◽  
Structure Property ◽  
Multi Scale ◽  
Structure Property Relationships ◽  
Process Structure

scholarly journals Microstructure and Defect-Based Fatigue Mechanism Evaluation of Brazed Coaxial Ti/Al2O3 Joints for Enhanced Endoprosthesis Design

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7895
Author(s):  
Johannes L. Otto ◽  
Ivan Fedotov ◽  
Milena Penyaz ◽  
Thorge Schaum ◽  
Anke Kalenborn ◽  
...  
Keyword(s):  
Cyclic Loading ◽  
Ceramic Surface ◽  
Structure Property ◽  
Hip Endoprosthesis ◽  
Wear Rates ◽  
Structure Property Relationships ◽  
Stem Taper ◽  
Probability Of Fracture ◽  
Process Structure ◽  
Viable Method

Alumina-based ceramic hip endoprosthesis heads have excellent tribological properties, such as low wear rates. However, stress peaks can occur at the point of contact with the prosthesis stem, increasing the probability of fracture. This risk should be minimized, especially for younger and active patients. Metal elevations at the stem taper after revision surgery without removal of a well-fixed stem are also known to increase the risk of fracture. A solution that also eliminates the need for an adapter sleeve could be a fixed titanium insert in the ceramic ball head, which would be suitable as a damping element to reduce the occurrence of stress peaks. A viable method for producing such a permanent titanium–ceramic joint is brazing. Therefore, a brazing method was developed for coaxial samples, and two modifications were made to the ceramic surface to braze a joint that could withstand high cyclic loading. This cyclic loading was applied in multiple amplitude tests in a self-developed test setup, followed by fractographic studies. Computed tomography and microstructural analyses—such as energy dispersive X-ray spectroscopy—were also used to characterize the process–structure–property relationships. It was found that the cyclic loading capacity can be significantly increased by modification of the surface structure of the ceramic.

scholarly journals Study of process/structure/property relationships in probeless friction stir spot welded AA2198 Al-Li alloy

2017 ◽  
Vol 61 (2) ◽  
pp. 291-298 ◽  
Author(s):  
Q. Chu ◽  
W. Y. Li ◽  
X. W. Yang ◽  
J. J. Shen ◽  
Y. B. Li ◽  
...  
Keyword(s):  
Structure Property ◽  
Friction Stir ◽  
Structure Property Relationships ◽  
Process Structure ◽  
Spot Welded
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