scholarly journals Microstructural Analysis of SiO2/Polyethylene Nanocomposites on Local and Macroscopic Scales

2007 ◽  
Vol 16 (2) ◽  
pp. 096369350701600
Author(s):  
B. Lehmann ◽  
J. Sustacha ◽  
A.K. Schlarb ◽  
K. Friedrich ◽  
M.Q. Zhang ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Surface Modification ◽  
Dynamic Mechanical Thermal Analysis ◽  
Material Properties ◽  
High Density Polyethylene ◽  
Filler Content ◽  
Microstructural Analysis ◽  
Local Scale ◽  
High Density ◽  
Dynamic Mechanical

High density polyethylene filled with nano-SiO2 of different face modification and content is investigated by nanoindentation, microindentation, scratching and dynamic mechanical thermal analysis. The results of the nanoindentation are compared with respect to more macroscopic measurements in order to obtain information if the surface modification and/or the filler content significantly changes the material properties on a local scale.

Poly(Vinyl Alcohol) Fiber Reinforced High Density Poly(Ethylene) Composites: Dynamic Mechanical Thermal Analysis

2018 ◽  
Vol 773 ◽  
pp. 46-50 ◽  
Author(s):  
Achmad Chafidz ◽  
Umi Rofiqah ◽  
Tintin Mutiara ◽  
Muhammad Rizal ◽  
Mujtahid Kaavessina ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Storage Modulus ◽  
Dynamic Mechanical Thermal Analysis ◽  
Vinyl Alcohol ◽  
High Density ◽  
Poly Vinyl Alcohol ◽  
Dynamic Mechanical ◽  
Melt Compounding ◽  
Twin Screw ◽  
Pva Fiber

In the present work, high density polyethylene (HDPE)/poly (vinyl alcohol) (PVA) fiber composites with four different PVA fiber loadings (i.e. 0, 5, 10, 20 wt%) have been prepared via melt compounding method using a twin-screw extruder. The composites were characterized for their morphology by using a scanning electron microscopy (SEM). Whereas, the dynamic mechanical thermal analysis (DMTA) was carried out by using an oscillatory rheometer. The DMTA test was carried out under torsion mode using temperature sweep test on rectangular composites samples. The DMTA results showed that the storage modulus (G¢) of the composites were higher than that of the neat HDPE and increased with increasing PVA fiber loadings. This indicated that there was a considerable stiffness enhancement of the composites. For example, at temperature of 60°C, the increases of stiffness (i.e. storage modulus) of the composites were approximately 3, 31, and 54% for PVAC-5, 10, and 20, respectively. Whereas, at higher temperature (i.e. 120°C), the increases were about 4, 50, and 98% for PVAC-5, 10, and 20, respectively. These results indicated that even at higher temperatures, the enhancement of storage modulus of the composites was still high.

Improvement of the Properties of Polyethylene with Chlorinated Polyethylene (CPE)

2003 ◽  
Vol 11 (2) ◽  
pp. 115-122
Author(s):  
Kálmán Marossy ◽  
Pál Bárczy
Keyword(s):  
High Density Polyethylene ◽  
Industrial Applications ◽  
Mechanical Tests ◽  
High Density ◽  
Structural Units ◽  
Chlorinated Polyethylene ◽  
X Ray ◽  
Dynamic Mechanical ◽  
X Ray Scattering ◽  
Multiphase Systems

Blends of high density polyethylene (HDPE) and chlorinated polyethylene (CPE) have been tested across the whole concentration range. Polyethylene is used to modify the properties of CPE in the elastomer industry, but modification of the properties of polyethylene with CPE is still not usual. Conventional mechanical tests and dynamic mechanical tests were carried out. The blends were found to be multiphase systems of excellent technological compatibility. Between 10 and 15% by weight CPE increased the modulus of polyethylene. X-ray scattering studies showed that the blends contained structural units not present either in the polyethylene or in the CPE. The blends were melt processable and may have industrial applications, too.

THE STRUCTURAL DEVELOPMENT OF NYLON6/LAYERED SILICATE NANOCOMPOSITE DURING ZONE-DRAWING

2006 ◽  
Vol 20 (25n27) ◽  
pp. 4577-4582
Author(s):  
SUNG SOO HAN ◽  
YANG-WHAN CHO ◽  
SOO-YOUNG PARK
Keyword(s):  
Thermal Analysis ◽  
Dynamic Mechanical Thermal Analysis ◽  
Crystalline Phase ◽  
Layered Silicate ◽  
Phase Region ◽  
Structural Development ◽  
X Ray ◽  
Dynamic Mechanical ◽  
X Ray Scattering ◽  
Degree Of Orientation

The structural development of nylon6/layered silicate nanocomposite during zone-drawing was studied using X-ray scattering and dynamic mechanical thermal analysis. The γ form, which was favored in the pressed film, was converted into the α form during zone-drawing. The newly developed α form, during zone-drawing, has a better orientation than the existing γ form, thus supporting the claim that the α form crystallizes away from the polymer-silicate inter-phase region during drawing. The degree of orientation of the layered silicate, projected along the TD direction, increases with the increase of the draw ratio, suggesting that the layered silicate has become straighter during zone-drawing, although the layered silicate within the zone-drawn film buckled perpendicular to the draw direction. The β transition of the dynamic mechanical thermal analysis is independent of the crystalline phase, although the α transition is strongly dependent upon the crystalline phase. This can be explained by the free volume that exists in the inter-phase between the γ lamellar and the layered silicate.

Effect of Technical Carbon the Deformation-Strength Properties of Low Pressure Polyethylene

2020 ◽  
Vol 869 ◽  
pp. 229-233
Author(s):  
Timur A. Borukaev ◽  
Abubekir Kh. Shaov ◽  
Raisa D. Archakova ◽  
Zakhirat Kh. Sultigova
Keyword(s):  
Carbon Black ◽  
Polymer Matrix ◽  
High Density Polyethylene ◽  
Entire Range ◽  
Filler Content ◽  
Strength Properties ◽  
Optimal Combination ◽  
High Density ◽  
Strength And Ductility ◽  
Properties Of Composites

The influence of carbon black on the deformation-strength properties of high density polyethylene is considered. It was found that the deformation-strength properties of the polymer matrix change over the entire range of the filler content. The amount of carbon black that can be introduced into high-density polyethylene and obtained a composite material with the optimal combination of stiffness, strength and ductility is established. It was shown that the change in the deformation-strength properties of composites is due to the behavior and influence of carbon black particles on the structure of the polymer matrix.

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