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Polyolefins |
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Name |
Description |
Synthesis |
Applications |
Disadvantages |
Advantages |
Links |
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Polyacetylene (PA) |
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High electrical conductivity |
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Spectra |
High MW polyethylene |
Back-bitting |
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Poor compressive properties because Van der Waal bonds hold fibrils together |
High strength/modulus, low density |
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Polyesters |
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Ekonol |
Liquid Crystalline Polyester (LCP) |
Biaxially oriented |
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Poor compressive properties because dipole interactions hold fibrils together |
High strength/modulus, low density |
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Kynol |
Phenolic fiber |
Start with novolac resin |
Flame resistant applications |
Acetylation needed to change color from orange/gold to white |
Low amount/toxicity of smoke, low density |
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Nomex |
Same chemical formula as Kevlar |
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Flame resistant applications |
Higher amount/toxicity of smoke than Kynol |
Stronger than Kynol |
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Polyethyleneterephthalate (PET) |
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Transesterfication reactions |
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Advanced thermosetting polyesters (ATSP) |
Interchain transesterfication reactions(ITR) |
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Composites, space shuttle tiles? |
expensive |
Solid state bonding(ITR), recyclable, |
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Polyamides |
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