A Study Into Some Thermal Properties of Novolak and its Composites

ضياء, بلقيس محمد; مجدي, حسن شاكر; عباس, رولا عبدالخضر

doi:10.30684/etj.26.11.14

	A Study Into Some Thermal Properties of Novolak and its Composites
Engineering and Technology Journal
Article 1, Volume 26, Issue 11, 2008, Pages 438-449 PDF (653.64 K)
DOI: 10.30684/etj.26.11.14
Authors
بلقيس محمد ضياء; حسن شاكر مجدي; رولا عبدالخضر عباس
Abstract
The research involves using phenol-formaldehyde (novolak) resin as a matrix for making composite material, while glass fiber type (E) and asbestos fiber type chrysolite were used as reinforcing materials. The specimens of composite materials were prepared from each type of all the fibers mentioned above with weight fraction of (60%) of their weight. After that the hybrid composite material was made by the addition of different types of these fibers in the same weight fraction, these specimens were made in different ratios of hexamethylenetetramine content including (10%) and (14%). Then the study on some thermal properties was carried out on all composites which were prepared and the results were compared with those of novolak resin alone. The effect of reinforcement with fibers on the properties of resin was studied, too. Thermal properties were studied including heat distortion temperature (HDT), thermal gravimetric analysis (TGA), erosion resistance by use of oxyacetylene burner and thermal conductivity. In general, the results have shown that after the reinforcement with different fibers and types of improvement factors improve the thermal properties. The positive effect of increasing the hexamethylenetetramine is to increase most properties of resin and its composites have shown a new case, which combines between the other reinforcement cases i.e. the possibility of combining properties in one material in a balanced form.

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