Presentation on theme: "Team Dipole Moment Barry Herndon Corey Parker Leo Pike Luis Whitworth."— Presentation transcript:
Team Dipole Moment Barry Herndon Corey Parker Leo Pike Luis Whitworth
Produced as a LCP using sulfuric acid as the solvent. – Forms a solid that is often woven into fabrics and other materials to reinforce them. Hydrogen bonding, aromatic stacking, and covalent bonds are main factors in high strength. – Two rings and multiple sights for hydrogen bonding allow for this. – Causes cross chain linkages and interactions. – Higher temperatures reduce this strength.
Ultimate Tensile Strength: 2500 MPa – Tensile Strength: 90 MPa – Melting Point: 500 ⁰C – Density: about 1.4 g/cm 3 Highly crystalline Caused by alignment of individual polymers Increased strength due to hydrogen bonding
Viscoelasticity improver – is added to the spinning dope to improve the viscoelasticity of the spinning dope. This allows highly oriented fiber bundles. Hydrazine – stabilizer; purifying of aromatic diamine by removal of impurities for production of aramid fiber with improved discoloration resistance Modifier or additive use
Aluminum Zirconium Trichlorohydrex glycol 20% (anhydrous) – Primary antiperspitant – Classified as a moderate hazard, shows strong evidence of being a neurotoxin, moderate evidence of being a human nervous system toxin, limited evidence of organ system toxicity Cyclopentasiloxane – Skin conditioner, solvent – At moderate doses serves as a threat for organ system toxicity, endocrine disruption, neurotoxicity, and cancer. Has also been suspected to bioaccumulate in the environment and body Dimethicone – Skin conditioner/protectant – Only expected to be harmful or toxic to organ systems and as an environmental toxin. Tribehenin – Skin conditioner/penetration enchancer – Non-toxic Petrolatum – Emollient, moisturizer, UV Absorber – Only suspected risk is as an organ system toxin Cyclodextrin – Absorbent – Not much research has been done, but used in a wide range of products without much research. c18-36 Acid Triglyceride – Emollient, skin conditioning – Not suspected to be toxic, though more research needs to be done ppg-14 Butyl Ether – Skin conditioner – Classified as safe in use for cosmetics
SourceQuality InformationLack of Information SciFinderPatents, Physical PropertiesDefinition of Liquid Crystal Internet- GoogleStructures, MorphologyHard to trust Internet- DupontUV DegradationVery vague Perry’s Chemical Engineering Handbook and other Encycolpedias Definition of Liquid CrystalNothing on Kevlar.
http://www2.dupont.com/Kevlar/en_US/index.html https://scifinder.cas.org/scifinder/view/scifinder/scifinderExplore.jsf Perry’s Chemical Engineering Handbook 7 th ed. Ollmann’s Encyclopedia of Industrial Chemistry 6 th ed. Encyclopedia of Materials: Science and Technology 10 th vol.