Maximum Coupling Efficiency (%) Maximum coupling efficiency of POF and LED 60 50 Cytop FEP 40 PTFE 7FM 30 PMHS (liquid) PDMS 20 PVDF 10 0 1,3 PMMA 1,32 1,34 1,36 1,38 1,4 1,42 1,44 1,46 1,48 1,5 Refractive Index of Cladding Table 2: Refractive Indices of Some Conventional Polymers from https://omnexus.specialchem.com/tech-library/article/low-ultra-low-refractive- index-polymers Classified by polymer type Ascending ranking Commodity Engineering PE PP PVC PS UP PUR PA PET Acrylics PC POM 1.51-1.54 1.5-1.51 1.53-1.55 1.55-1.59 1.52-1.54 1.5-1.6 1.53-1.54 1.55-1.64 1.49-1.57 1.58-1.6 1.48-1.51 Fluorinated Epoxy POM Acrylics PP PUR PE UP PA PVC PS 1.31-1.4 1.45-1.6 1.48-1.51 1.49-1.57 1.5-1.51 1.5-1.6 1.51-1.54 1.52-1.54 1.53-1.54 1.53-1.55 1.55-1.59 Specialty PEI Sulfone Epoxy Fluorinated PEEK 1.66-1.67 1.63-1.65 1.45-1.6 1.34-1.4 1.65-1.77 PET PC Sulfone PEEK PEI 1.55-1.64 1.58-1.6 1.63-1.65 1.65-1.77 1.66-1.67 Note: The polymers PE, PP, PA, PET, POM and PEEK are not amorphous and thus not transparent Table 3: Low Refractive Indices of Numerous Fluoropolymers and a Few Non-fluorinated Polymers After: https://omnexus.specialchem.com/tech-library/article/low-ultra-low-refractive-indexpolymers Fluoropolymers Refractive indices TeflonTM AF (DuPont Spin-off - Now Chemours) 1.31+ Cytop (AGC) 1.31+ Poly(hexafluoropropylene oxide) 1.31+ Fluorinated Ethylene Propylene 1.338 Poly(tetrafluoroethylene-co-hexafluoropropylene) 1.338 Poly(pentadecafluorooctyl acrylate) 1.339 Perfluoroalkoxy 1.34 Poly(tetrafluoro-3-(heptafluoropropoxy)propyl acrylate) 1.346 Poly(tetrafluoro-3-(pentafluoroethoxy)propyl acrylate) 1.348 Poly(tetrafluoroethylene) 1.35 Tetrafluoroethylene hexafluoropropylene vinylidene fluoride 1.35 Poly(undecafluorohexyl acrylate) 1.356 Poly(nonafluoropentyl acrylate) 1.36 Poly(tetrafluoro-3-(trifluoromethoxy)propyl acrylate) 1.36 Poly(pentafluorovinyl propionate) 1.364 Poly(heptafluorobutyl acrylate) 1.371 Poly(trifluorovinyl acetate) 1.375 Poly(1,1,1,3,3,3-hexafluoroisopropyl acrylate) 1.375 Poly(octafluoropentyl acrylate) 1.38 Poly(methyl 3,3,3-trifluoropropyl siloxane) 1.383 Poly(2,2,3,3,4,4,4-heptafluorobutyl methacrylate) 1.383 Poly(pentafluoropropyl acrylate) 1.385 Poly(2,2,3,3,3-pentafluoropropyl acrylate) 1.389 Poly(2-heptafluorobutoxy)ethyl acrylate) 1.39 Poly(chlorotrifluoroethylene) 1.39 Poly(1,1,1,3,3,3-hexafluoroisopropyl methacrylate) 1.39 Poly(2,2,3,4,4-hexafluorobutyl acrylate) 1.392 Poly(2,2,3,4,4,4-hexafluorobutyl acrylate) 1.394 Poly(2,2,3,3,3-pentafluoropropyl methacrylate) 1.395 Non-fluorinated polymers Refractive indices Poly(methyl hydro siloxane) 1.397 Hydroxypropyl cellulose 1.337 Dimethylpolysiloxane 1.41 Poly(vinylidene difluoride) 1.42 Liquid When dissolved in a solvent.

DUPONT DE NEMOURS & COMPANY NEWARK, DELAWARE ^Lc ^u^ Acute^ toxicity of 8233 to rainbow troutj (salrno gairdneri).

AR226-2700 AR226-2700 TORONTO WORKSHOP MATERIALS September 13-14,2004 John Gannon DuPont Central Research & Develop Wilmington, DE of in the Is the Sources?

Associate members are DuPont, Gujarat Fluorochemicals, Honeywell and HE Plastics.

All rights reserved. http://dx.doLorg/10.1016/j.matdes 2013 07.079 a setback in early 2006, when spread the news of the alleged toxicity of Teflon" (commercial name for polytetrafluoroethylene products patented by DuPont).

AR226-2177 Dupont - Washington Works - C8 Project N O T E S from S ite Inspection C hris Arrington and D ave Roberts ' August 9 ,2 0 0 1 10:0 0 a ;m . - 3 :00 p.m

Jepson The DuPont Company, Haskell Laboratory for Toxicology and Industrial Medicine, Newark, Delaware, USA IIntroduction Perfluorooctanoic acid (PFOA) is a fluoroorganic surfactant used in fluoropolymer processes. .

Ohio 1.0-5.0 Dupont.

McCusick of Haskell Laboratories at DuPont has been sent copies of the JUN 5 - 19QQ manuscripts to be published, ' R i nnvicr ru J .

Of all the unlikely explanations above,the least unlikely is residual FC 143 for whatever) we sell to DuPont to polymerize TFE in Teflon cookware.

HARARE - RAY. 406 MR226 _ 3224 -_ oDwuepwow94n17 TRADE SECRET Study Tide H-25134: Oral Approximate Lethal Dose (ALD) in Rats Laboratory Project ID: DuPont-9417 AUTHOR: Carol Finlay, BA STUDY COMPLETED ON: January 21, 2002 PERFORMING LABORATORY: E.L du Pont de Nemours and Company Haskell Laboratory for Health and Environmental Sciences Elkton Road, P.O.

O .K h DuPont Modeling Methodology and Results DRAFT Shimizu Site June 2003 CAB000375 EID719411 06/02/03 cs !

Robertson A ttachm ent (1 page --redacted) COMPANY SANITIZED PUBLIC COPY DEC, 2 0 .2 0 0 4 3:15PM DUPONT LEGAL ENVT NO. 426 P. 3/3 -------- 2002-------- 3SRHT-- - C-6 Result Co t ^ ` O*' iW' 1 12/20/2004 MON 14:59 [TX/RX NO G223] @ 0 0 3

Petit English Translation of Report Summary for DuPont Chemical Solutions Enterprise 27-Jan-03 .

M M _ 3- DuPont Haskell Laboratoiy for Health and Environmental Sciences FROM: J.