Polycondensates Essay

2 POLYAMIDES, FILLERS AND LITERATURE REVIEW OF POLYMER -PARTICULATE FILLER COMPOSITES

This literature review focuses on the properties developed by polymer composites due to interaction with particulate Gr , Al2O3 and SiC fillers produced using processing technique of moulding method. The advantages of one process over the others is in improving the tribological, mechanical, and thermal properties of particulate fillers using within the PA6 polymer were reviewed.

2.1 POLYAMIDES

Polyamides (PA) are an important group of the thermoplastic polycondensates. The amide group (±NHCO±) can be obtained by polymerization of lactams (polylactams) or by condensation of diamines with dicarboxilic acids (nylons). Polyamides constantly attract broader interest because of their unique mechanical, thermal, and morphological properties stated by Hatke et al (1991) , Spiliopoulos and Mikroyannidis (1998), Liaw et al (2003). Polyamide is well known for its excellent mechanical properties stated by Liu et al (2006). The two major types of polyamides are polyamide 6 and polyamide 66. PA 6 is prepared by the polymerization of caprolactam. Polyamides do reveal a tendency to creep under applied load. In addition, the properties of polyamides are considerably affected by

Because of its light weight, and it is utilized to make air planes. Its moderate response with oxygen and its high boiling point. Aluminum oxide exists in temperatures-stable crystalline structures. It stands chemical and physical attributes like a compound known as natural corundum. It is a very hard material that resists any type of wear. It is additionally among the hardest compounds in presence, which makes conceivable it is use as an abrasive material. Aluminum oxide conducts electricity easily and responding with acids and bases at high temperature. It is a good thermal conductor because of its high boiling