Polyamide aramid fibre-reinforced

Cover micrograph of aramid fibre-reinforced polyamide 6,6, reproduced with permission from... 

As a result of their outstanding physical and mechanical properties, aromatic polyamides are attractive materials for use in high-performance structural applications 853072 833611 820253, including aircraft components or fire protection garments, as constituents of both traditional, i.e., fibre-reinforced composites 774110 762844, and molecular composites. One of these applications takes advantage of their thermal stability 881232 825031 763791 755849 and allows the manufacturing of heat-resistant materials for fire protection 713906. In a different context, aromatic polyamides (aramid fibres) have been proposed in the past few years as precursors of activated carbon materials with distinctive adsorbent properties (thermally stable molecular sieves). Aramid fibres, e.g., poly(w-phenylene isophthalamide), poly(p-phenylene terephthalamide) 709654, etc., are a class of synthetic polymers that possess excellent thermal and oxidative stability, good flame resistance, and superior mechanical and dielectric behaviour. 

Short fibre reinforced polyamide E-glass Aramid Carbon... 

Some basic property examples of short aramid, glass and carbon fibre reinforced polyamide are shown earlier in Table 6.30. 

EMS hybrid yarns or Schappe s preimpregnated yarns are a combination of reinforcing fibres (glass, aramid or carbon) and polyamide 12. 

The word reinforcement will refer in this book exclusively to strong, stiff fibres. They can be made of glass, aramid (e.g. KevlaT (DuPont)) or high molecular weight polyethylene (e.g. Dyneema (DSM)), carbon/graphite, polyamide (nylon), jute, and so on. The fibres can be long, virtually continuous or short (e.g. 1mm). 

Aramids The term aramid is used to describe aromatic and partially aromatic polyamides, which constitute a class of materials that are analogous to the aliphatic nylons . The fully aromatic polymers in this category are linear, but not thermoplastic, as they decompose before they flow sufficiently to allow shaping. However, wet spinning of fibres is possible and such materials have many technical applications besides being used as reinforcement. 

Polymeric fibers. All types of ehemieal fibers known can be employed for polyolefin reinforeement thus aramid (aromatic polyamide) polyamides, polyesters polyvinyl alcohol fibres, cellulose fibers [2, 5, 52, 70-72, 77], etc. are used the polyolefin fibers (sueh as UHMWPE) themselves are applied as reinforcements in other composites. 

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