Bacterial cellulose composites loaded with SiO 2 nanoparticles: Dynamic-mechanical and thermal properties

2016 ◽  
Vol 93 ◽  
pp. 672-677 ◽  
Author(s):  
Somayeh Sheykhnazari ◽  
Taghi Tabarsa ◽  
Alireza Ashori ◽  
Abbas Ghanbari
Keyword(s):  
Thermal Properties ◽  
Bacterial Cellulose ◽  
Mechanical And Thermal Properties ◽  
Dynamic Mechanical ◽  
Cellulose Composites

Dynamic Mechanical Thermal Properties of a New Metal/Polymer Composite for Fused Deposition Modelling Process

2007 ◽  
Vol 561-565 ◽  
pp. 795-798 ◽  
Author(s):  
W.Q. Song ◽  
Syed H. Masood
Keyword(s):  
Composite Material ◽  
Thermal Properties ◽  
Polymer Composite ◽  
Injection Moulding ◽  
Rapid Tooling ◽  
Fused Deposition Modelling ◽  
Mechanical And Thermal Properties ◽  
Dynamic Mechanical ◽  
Fused Deposition ◽  
Metal Polymer

This paper introduces an entirely new metal based composite material for direct rapid tooling application using Fused Deposition Modelling rapid prototyping system with desired mechanical and thermal properties and characteristics. The paper specifically describes the results of the dynamic mechanical thermal analysis (DMTA) of this new metal/polymer composite material, consisting of iron particles in nylon type matrix, for use in FDM process and with the aim of application to direct rapid tooling for injection moulding. The work represents a major development in the direction of direct rapid tooling for reducing the cost and time in tooling manufacture for injection moulding.

Effect of chlorinated polyethylene on dynamic mechanical and thermal properties of SAN/EPDM blends in dependence of mixing conditions

2017 ◽  
Vol 50 (3) ◽  
pp. 204-221
Author(s):  
Mona Taheri ◽  
Jalil Morshedian ◽  
Hossein Ali Khonakdar ◽  
Jacques WM Noordermeer
Keyword(s):  
Thermal Properties ◽  
Complex Modulus ◽  
Chain Scission ◽  
Mechanical Analysis ◽  
Single Step ◽  
Mechanical And Thermal Properties ◽  
Chlorinated Polyethylene ◽  
Step Process ◽  
Dynamic Mechanical ◽  
Droplet Morphology

The effect of chlorinated polyethylene (CPE) on the compatibilization and thermal properties of styrene-acrylonitrile copolymers (SAN)/Ethylele-Propylene-Diene-polyMethylene rubber (EPDM) blends (80/20) was investigated. Two different mixing procedures were employed, that is, single- and two-step blending. In the single-step process, EPDM was melt blended with CPE and SAN simultaneously, which led to a droplet morphology. In the two-step process, first, a masterbatch of EPDM and CPE in SAN was prepared, and then mixed with further amounts of SAN and CPE in order to reach the same fixed blend ratio of 80/20 for SAN/EPDM. The morphology changed from EPDM droplets for the one-step mixing to co-continuous for the two-step blending process. This morphological change was reflected in a change of the complex modulus. The characteristics of thermogravimetric analysis (TGA) curves (T1%, T5%, T30%, and T50%) were examined, as indicators for improved thermal stability of the blends. The intermolecular interaction characterized by the Kwei equation showed higher values for the blends prepared by the two-step mixing procedure. The dynamic mechanical analysis supported the occurrence of chain scission in the SAN phase at the beginning of aging and cross-linking of SAN at higher temperatures and longer times as a result of cyclization of CN groups in SAN.

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