A comparative study on viscoelastic properties of polymeric composites measured by a longitudinal free vibration non-destructive test and dynamic mechanical thermal analysis

The current study focuses on the development of silanized graphene oxide reinforced basalt fiber/epoxy composites for enhanced tribological and viscoelastic properties. The modified-graphene oxide nanoplatelets were characterized using energy-dispersive X-ray spectroscopy, and Raman analyses. Pin-on-disk wear test and dynamic mechanical thermal analysis were conducted to determine the tribological and viscoelastic properties of the fabricated specimens with different silanized-graphene oxide loadings in the matrix (0–0.5 wt.% at a step of 0.1). The multiscale specimens were fabricated using the hand lay-up technique. The best silanized-graphene oxide loading for effectively enhancing the tribological properties was found to be 0.4 wt.%, whose wear rate and friction coefficient were 62% and 44%, respectively lower than those of the neat basalt/epoxy composite. The examination of the worn surfaces showed the enhanced basalt fiber/epoxy bonding in graphene oxide-reinforced specimen. From the results of dynamic mechanical thermal analysis, the specimen filled with 0.4 wt.% silanized-graphene oxide demonstrated the highest increase of 130% and 13.6℃ in the storage modulus and glass transition temperature as compared to the neat composite. This study indicated that the addition of silanized-graphene oxide considerably enhanced the tribological and viscoelastic properties of the fibrous composites.

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Dynamic-mechanical thermal analysis of aramid-silica hybrid composites prepared in a sol-gel process

Journal of Applied Polymer Science ◽

10.1002/(sici)1097-4628(19970307)63:10<1345::aid-app14>3.0.co;2-3 ◽

1997 ◽

Vol 63 (10) ◽

pp. 1345-1352 ◽

Cited By ~ 49

Author(s):

Z. Ahmad ◽

M. I. Sarwar ◽

J. E. Mark

Keyword(s):

Thermal Analysis ◽

Dynamic Mechanical Thermal Analysis ◽

Hybrid Composites ◽

Sol Gel ◽

Dynamic Mechanical ◽

Sol Gel Process ◽

Silica Hybrid

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

International Journal of Modern Physics B ◽

10.1142/s0217979206041719 ◽

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.

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