Practical Polymer Blends: A General Approach for the Design of Optical Materials with Tailored Properties Christoph Weder Department of Macromolecular Science and EngineeringSlide 2
Functional Polymer Blends Summary Approach: Blending of "passive" polymers with minor divisions of "active" visitor particles, which present chose functionalities . Inspiration: Rather than growing new materials frameworks \'without any preparation\', the approach endeavors to join the property networks and handling conventions of surely understood polymers with the uncommon, promptly customized properties of utilitarian natural atoms . Challenges: Characterize and control supramolecular models.Slide 3
Functional Polymer Blends Outline Light-Polarizing Photoluminescent Systems Excimer Probes Functional Multilayer Films ConclusionsSlide 4
Linear Polarization of Light Introduction Linearly captivated light is typically produced by the utilization of dichroic polarizers Applications: Liquid precious stone presentations , shades, optical channels Dichroic Polarizer: Uniaxially situated retaining colors, straightly spellbound retention, proficiency < 45 % Photoluminescent (PL) Polarizer: Uniaxially arranged luminescent particles, directly enraptured outflow, Combination of polarizer and "dynamic" shading channelSlide 5
Light-Polarizing PL Polymers PL LCDs Science 1998 , 279 , 835. PCT IB98/00998 (1998)Slide 6
Light-Polarizing PL Polymers PL LCDs Science 1998 , 279 , 835. WO 9901792 (1999)Slide 7
Light-Polarizing PL Polymers Security Features WO 0019016 (2001)Slide 8
Light-Polarizing PL Polymers Processing Adv. Mater. 1997 , 9 , 1035. J. Mater. Chem. 1999 , 9 , 2221.Slide 9
Light-Polarizing PL Polymers PropertiesSlide 10
Light-Polarizing PL Polymers Properties Polarized ingestion and outflow of situated ( = 80) 2 % w/w EHO-OPPE/UHMW PE mix movies DR A = 57 DR E = 72Slide 11
Light-Polarizing PL Polymers Orientation Mechanism Synth. Met. 2001, 124 , 113.Slide 12
Light-Polarizing PL Polymers Orientation MechanismSlide 13
Light-Polarizing PL Polymers Orientation Mechanism J. Phys. Chem. 2000 , 104 , 5221.Slide 14
Light-Polarizing PL Polymers Patterning Polarizer unpolarized 0° 90°Slide 15
Nature 1998 , 392 , 261. Macromolecules 1999 , 32 , 4677 . Phys. Chem. Chem. Phys. 1999 , 1, 5697.Slide 17
Cyano-OPVs Excimer Formation upon p - p stacking 1,4-bis (a - cyano-4-methoxystyryl)- 2,5-dimethoxybenzene BCMDB: 644 506/538 Synthesis 2002 , 1185. US Patent Appl. recorded.Slide 18
Cyano-OPVs Excimer Formation upon p - p stacking 1,4-bis (a - cyano-4-methoxystyryl)- benzene BCMB: 561 459/485Slide 19
Cyano-OPVs Excimer Formation upon p - p stacking Birks, J. Photophysics of Aromatic Molecules, Wiley, New York 1970.Slide 20
Cyano-OPVs Synthesis R1 R2 Yield BCMDB: MeO MeO 89% BCMB: MeO H 90% BCEHODB: 2-Ethylhexyloxy MeO 83% Synthesis 2002 , 1185. US Patent Appl. documented.Slide 21
Excimers as Molecular Probes Diffusion Dyeing Polymer film Dye Solvent (toluene, CHCl 3 ) Diffusion coloring Rinsing, dryingSlide 22
Excimers as Molecular Probes Diffusion-Dyed Polymer Blends PL spectra of LLDPE/BCMDB mix film ( ~ 0.1 % w/w) - Influence of elastic misshapening: PL spectra of LLDPE/BCMDB mix movies: [dye] (% w/w): ( — ) ~0.02, ( — ) ~0.06, ( — ) ~0.1, ( — ) ~0.3 Adv. Mater. 2002 , 22 , 1625-1629 . ; US Patent Appl. Documented.Slide 24
Excimers as Molecular Probes Diffusion-Dyed Polymer Blends PL lifetime of LLDPE/BCMDB mix movies (ex 481 nm): [dye]/% w/w: ● ~ 0.02, ● ~ 0.1, ■ ~ 0.1 extended to 200 % 530 nm 650 nmSlide 25
Excimers as Molecular Probes Melt Processing of Blends Polymer Dye Extrusion Polymers: LLDPE, PP; Film thickness ~100 m; Dye focus 0.01 – 0.40 % w/wSlide 26
Melt-Processed BCMBD/LLDPE Blends Properties PL spectra of crisply extinguished LLDPE/BCMDB mix movies: [dye]/% w/w: ( — ) 0.01, ( — ) ~0.05, ( — ) ~0.1, ( — ) ~0.20, ( — ) ~0.40Slide 27
Melt-Processed BCMBD/LLDPE Blends Properties PL spectra of LLDPE/BCMDB mix film ( ~ 0.18 % w/w) Influence of molding at room temperature: Polym. Mater. Sci. Eng. 2003 , In Press.Slide 28
Melt-Processed Blends Phase BehaviorSlide 29
Melt-Processed BCMBD/LLDPE Blends Conditioning PL spectra of a LLDPE/BCMDB mix film ( ~ 0.18 % w/w) before/in the wake of molding at room temperature: PL spectra of a LLDPE/BCMDB mix film ( ~ 0.18 % w/w) before/in the wake of molding at room temperature:Slide 30
Melt-Processed Blends Mechanical Deformation PL spectra of an adapted LLDPE/BCMDB mix film ( ~ 0.18 % w/w) before/after disfigurement to l = (l-l 0 )/l 0 = 300 % PL spectra of a molded LLDPE/BCMB mix film ( ~ 0.18 % w/w) before/after misshapening to l = (l-l 0 )/l 0 = 300 %Slide 31
Excimers as Molecular Probes Application Anti - Tampering Films Security Features/Brand Protection Integrated Failure Indicators - Protective Gear - Load-bearing Structures - Adhesives . . .Slide 32
AB Feedblock Extruder An Extruder B Melt Pump B Melt Pump A Multipliers Exit Die Cross-Section of Layer Multiplier Flow Direction Layer Multiplier Functional Multilayer Films Process of Multilayering E. Baer et al. Preparing and Properties of Polymer Microlayered Systems in Polymer Process Engineering 97 ; Coates, P.D. Ed.; The Institute of Materials, London:1997, 137-157.Slide 33
n 1 n 2 n 1 n 2 Functional Multilayer Films Reflective Films with substituting layers of two polymers of various refractive files are profoundly intelligent.Slide 34
n 1 n 1 n 2 n 2/n 3/n 2 n 1 n 1 n 2 n 2/n 3/n 2 n 1 n 1 Functional Multilayer Films Photoreactive Films A B C Incorporation of photoreactive components in intelligent multilayer movies Multilayer movies with rotating "inactive" and "photoreactive" layers Exposure of movies changes RI of exchange photoreactive layers By specifically uncovering certain ranges of a film to UV radiation, examples can be created because of the RI change in substitute layers Low-cost, tuneable optical components (dielectric mirrors, security highlights,… )Slide 35
Functional Multilayer Films Photoreactive Films Polymers utilized for photoreactive multilayer movies Photodimerization response of cinnamic corrosive Cinnamic corrosive dimerizes in a 2+2 cycloaddition response to shape truxillic corrosive upon introduction to high-vitality UV light ( λ = 278 nm) Upon dimerization the refractive record is lessened from 1.555 to 1.523Slide 36
Effect of piece on T g Phase Behavior of PMMA-CA Blends T g of mixes abatements with grouping of CA CA has a plasticizing impact on PMMA Homogeneous blends of PMMA-CA are acquired up to a centralization of 20% CA w/wSlide 37
Photoreaction Photophysical Behavior of PMMA-CA Blends Change of the UV retention range of a PMMA-CA mix upon presentation to a 100 W air-cooled Hg light (higher power)Slide 38
Refractive Index Photophysical Behavior of PMMA-CA Blends RI of mixes increments directly with organization RI of mixes reductions upon introduction to UV; The relative RI change increments with the convergence of CASlide 39
PMMA/PMMA-CA Photopatterning of Multilayer Films PMMA/PMMA multilayer film PMMA-CA solid film 100 µ m PMMA/PMMA-CA (15 % w/w) 1024 layers, d = 50 nm US Prov. Appl. documentedSlide 40
PC/PMMA-BZPO Photopatterning of Multilayer Films PC/PMMA-BZPO (0.1 % w/w) 1024 layers, d = 75 nm J. Mater. Chem. 2002 , 12 , 2620-2626 .Slide 41
New Concepts Functional Multilayer Films < 5 nm Orientation Integration of PL colors in reflecting cavity: Optically invigorated lasing? "Constrained gathering" of PL colors: Spatially determined (polarizing) vitality exchange "Constrained get together" of p-and n-sort polymer semiconductors: Efficient charge detachment?Slide 42
Conclusions Functional Polymer Blends The mixing of "inactive" network polymers with minor measures of "dynamic" visitor particles speaks to an alluring, general idea for the outline of practical polymer frameworks. Sufficient portrayal and control of supramolecular structures – at different levels – is vital.Slide 43
Acknowledgments CWRU Weder Group CWRU Macro Science Brent Crenshaw Ximei Sun Dr. Eric Baer Akshay Kokil Ravisubash Tangirala Dr. Anne Hiltner Christian Huber Eric Hittinger Dr. Christiane L öwe Dr. Christoph Kocher CWRU Physics Dr. Michael Schroers Dr. Quinghui Chu Dr. Kenneth Singer ETHZ Materials ETHZ Chemistry Dr. Cees Bastiaansen Dr. Bert Hecht Dr. Walter Caseri Dr. Alois Renn Dr. Christoph Kocher Dr. Werner Trabesinger Dr. Andrea Montali Prof. Urs Wild Dr. Anja Palmans Dr. Paul Smith Dr. Theo Tervoort Funding 3M Nontenured Faculty Award National Science Foundation DMR-0215342 DuPont Aid to Education Grant Sumitomo Bakelite Co. DuPont Young Professor Grant The Goodyear Tire and Rubber Company Hayes Foundation Equipment Grant The Petroleum Research Foundation Landqart Co.
Daylight and water beads are important for the development of a rainbow. ... The bended state of ...
how does Superman utilize his suit to perform his obligations as a superhero? ... For instance: ...
E of PC custom-made Smoking Cessation Advice in Primary carE ... Smokers (n=50,000) sent the Smo ...
2. This Time. What are plastics and polymers?Polymer RheologyMajor Plastics Molding ProcessesExt ...
Members. TU EindhovenTU AthensMPI-P MainzThijs MichelsDoros TheodorouNico v.d. VegtB. Vorselaars ...
- Liquid Polymer Epoxy (LPE ) - Novalac Technology includes different controlled crosslinks of C ...
“Cancer2006: From molecular biology processes to tumor-tailored therapy” 20-24, august, 20 ...
Neutron spectroscopy for analysis of dynamics of polymers and proteins: A view of a neutron us ...
Materials. Properties of Materials. Mechanical Properties : strength, toughness, ductility, ...
Carbon Nanotube Polymer Composites: A Review of Recent Developments. Rodney Andrews & Matthew ...
Diagram. IntroductionSystem OverviewTIA designLimiter DesignFrequency Acquisition CDR DesignPros ...
Highlights BENEFITS*Low TX Loss. *Long repeater Spacing or Repeater less N/W.* Wide Bandwidth.* ...
References. ? Essential reference for this discussion: Quantum Semiconductor Structures, Fundame ...
Polymer Stretching by Turbulence. MC, PRL 05/00. Equalization of strengths . Models of Elasticit ...