Structure-property relationships of fatty acid swollen, crosslinked natural rubber shape memory polymers

2018 ◽  
Vol 56 (8) ◽  
pp. 673-688 ◽  
Author(s):  
Marcos Pantoja ◽  
Zhiwei Lin ◽  
Mukerrem Cakmak ◽  
Kevin A. Cavicchi
Keyword(s):  
Fatty Acid ◽  
Natural Rubber ◽  
Shape Memory ◽  
Shape Memory Polymers ◽  
Structure Property ◽  
Structure Property Relationships

Effect of Sidegroup on Mechanical Properties of Acrylate Networks for Biomedical Applications

2008 ◽  
Author(s):  
David Safranski ◽  
Ken Gall
Keyword(s):  
Mechanical Properties ◽  
Shape Memory ◽  
Biomedical Applications ◽  
Shape Memory Polymer ◽  
Shape Memory Polymers ◽  
Structure Property ◽  
Know How ◽  
Structure Property Relationships ◽  
Chain Stiffness ◽  
Recovery Strain

The purpose of this study was to understand how the side group dictates thermo-mechanical properties of shape-memory acrylate networks, specifically strain to failure and toughness. A useful parameter in assessing shape memory polymers is the strain to failure because it is critical to know how much recovery strain the material can experience. To understand how the structure is related to mechanical properties, such as strain to failure, materials of differing chain stiffness ratio, C∞, were compared at varying percentages of crosslinker. While the chemical and thermal properties of acrylate networks have been discussed in much detail, methods of toughening networks by the precise choice of certain acrylates have not been thoroughly examined. In order for these networks to be of practical use as biomedical devices, such as minimally invasive shape memory polymer stents, detailed structure-property relationships must be established.

Study of the structure–property relationships in a high impact and shape memory polyester by the stereoisomer selection of the cyclobutane diol monomer

2013 ◽  
Vol 48 (24) ◽  
pp. 8588-8595 ◽  
Author(s):  
Yelena Nash ◽  
Tyler L. Nash ◽  
Brandon Henderson ◽  
El-Shazly M. Duraia ◽  
Clois E. Powell ◽  
...  
Keyword(s):  
Shape Memory ◽  
High Impact ◽  
Structure Property ◽  
Structure Property Relationships ◽  
Selection Of

Investigation of Thermomechanical Behaviors of Epoxy Shape Memory Polymers by Molecular Dynamics Simulation

2013 ◽  
Vol 273 ◽  
pp. 463-467 ◽  
Author(s):  
H. Yang ◽  
K. Zou ◽  
X.Y. Liang
Keyword(s):  
Molecular Dynamics ◽  
Shape Memory ◽  
Thermomechanical Processing ◽  
Functional Materials ◽  
Shape Memory Polymers ◽  
Dynamics Simulation ◽  
Structure Property ◽  
Great Work ◽  
Micro Deformation ◽  
Shape Frozen

Shape memory polymers (SMPs) possess the capability of shape frozen and recovery via thermomechanical processing. Over the last decades, great work has focused on their macro-properties. In order to have a better understanding of the micro-deformation mechanisms of this class of functional materials, the thermomechanical behaviors of three types of epoxy SMPs with varied curing agent contents were simulated by the molecular dynamics (MD) method. Special attention was paid on the different responses of the materials in the rubbery and glassy states. Moreover, structure-property analyses were presented.

Structure–property relationships in a precipitation strengthened Ni–29.7Ti–20Hf (at%) shape memory alloy

2015 ◽  
Vol 637 ◽  
pp. 63-69 ◽  
Author(s):  
B.C. Hornbuckle ◽  
T.T. Sasaki ◽  
G.S. Bigelow ◽  
R.D. Noebe ◽  
M.L. Weaver ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Structure Property ◽  
Structure Property Relationships

The Thermal Transport Properties of Polymers

1977 ◽  
Vol 50 (3) ◽  
pp. 480-522 ◽  
Author(s):  
D. Hands
Keyword(s):  
Thermal Conductivity ◽  
Thermal Diffusivity ◽  
Heat Flow ◽  
Natural Rubber ◽  
Material Selection ◽  
Reliable Data ◽  
Large Scatter ◽  
Structure Property ◽  
Structure Property Relationships

Abstract Values of thermal diffusivity and thermal conductivity are needed for heat-flow calculations, for the determination of structure-property relationships, and for material selection and comparison. However, all aspects are hampered by a dearth of reliable data and anything more than a superficial glance at the literature is apt to be discouraging for the uninitiated. Hardly any thermal diffusivity data exist, and the reported values of thermal conductivity show very large scatter. The present state of confusion can be seen, for example, in Figures 1 and 2, which show the reported thermal conductivity values for polystyrene and gum natural rubber. Not only do the values differ at some temperatures by more than 100%, and in the case of rubber by almost 300%, but different trends are indicated throughout the temperature range. Discrepancies of this size cannot be due to sample variations, and they give some indication of the experimental difficulties associated with thermal property measurements.

scholarly journals Processing and structure–property relationships of natural rubber/wheat bran biocomposites

Cellulose ◽  
2016 ◽  
Vol 23 (5) ◽  
pp. 3157-3175 ◽  
Author(s):  
Krzysztof Formela ◽  
Aleksander Hejna ◽  
Łukasz Piszczyk ◽  
Mohammad Reza Saeb ◽  
Xavier Colom
Keyword(s):  
Natural Rubber ◽  
Wheat Bran ◽  
Structure Property ◽  
Structure Property Relationships

New Design of Shape Memory Polymers Based on Natural Rubber Crosslinked via Oxa-Michael Reaction

2014 ◽  
Vol 6 (8) ◽  
pp. 5695-5703 ◽  
Author(s):  
Tengfei Lin ◽  
Siwei Ma ◽  
Yang Lu ◽  
Baochun Guo
Keyword(s):  
Natural Rubber ◽  
Shape Memory ◽  
Michael Reaction ◽  
Shape Memory Polymers
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