OS0704 Determination of Dynamic Compressive Properties for PLLA/PCL Polymer Blends Using Experiments and Simulation

2013 ◽  
Vol 2013 (0) ◽  
pp. _OS0704-1_-_OS0704-2_
Author(s):  
Masahiro NISHIDA ◽  
Yoshitaka ITO ◽  
Tesuo TAKAYAMA ◽  
Mitsugu TODO ◽  
Gustaf GUSTAFSSON ◽  
...  
Keyword(s):  
Polymer Blends ◽  
Compressive Properties

A quantitative image analysis method for the determination of cocontinuity in polymer blends

1993 ◽  
Vol 51 ◽  
pp. 894-895
Author(s):  
William A. Heeschen
Keyword(s):  
Image Analysis ◽  
Polymer Blends ◽  
Quantitative Measurement ◽  
Morphological Evolution ◽  
Phase Ratio ◽  
Irregular Shapes ◽  
Quantitative Image ◽  
Discrete Domains ◽  
A Domains

Two new morphological measurements based on digital image analysis, CoContinuity and CoContinuity Balance, have been developed and implemented for quantitative measurement of morphology in polymer blends. The morphology of polymer blends varies with phase ratio, composition and processing. A typical morphological evolution for increasing phase ratio of polymer A to polymer B starts with discrete domains of A in a matrix of B (A/B < 1), moves through a cocontinuous distribution of A and B (A/B ≈ 1) and finishes with discrete domains of B in a matrix of A (A/B > 1). For low phase ratios, A is often seen as solid convex particles embedded in the continuous B phase. As the ratio increases, A domains begin to evolve into irregular shapes, though still recognizable as separate domains. Further increase in the phase ratio leads to A domains which extend into and surround the B phase while the B phase simultaneously extends into and surrounds the A phase.

Self-association versus interassociation in hydrogen bonded polymer blends: 1. Determination of equilibrium constants from miscible poly(2,6-dialkyl-4-vinyl phenol) blends

Polymer ◽  
1996 ◽  
Vol 37 (21) ◽  
pp. 4753-4761 ◽  
Author(s):  
Michael M. Coleman ◽  
George J. Pehlert ◽  
Xiaoming Yang ◽  
John B. Stallman ◽  
Paul C. Painter
Keyword(s):  
Polymer Blends ◽  
Equilibrium Constants ◽  
Self Association ◽  
Vinyl Phenol ◽  
Hydrogen Bonded

New materials from degraded styrene-acrylonitrile and ethylene-propylene-diene copolymers

e-Polymers ◽  
2004 ◽  
Vol 4 (1) ◽  
Author(s):  
Jasminka Vugrinec ◽  
Ljerka Kratofil ◽  
Zlata Hrnjak-Murgić ◽  
Jasenka Jelenčić
Keyword(s):  
Ir Spectroscopy ◽  
Polymer Blends ◽  
Graft Copolymer ◽  
Chloroform Solution ◽  
Polymerization Process ◽  
Time Interval ◽  
Grafting Reaction ◽  
Styrene Acrylonitrile

Abstract Polymer blends of styrene-acrylonitrile (SAN) and ethylene-propylenediene copolymer (EPDM) were prepared by casting films from chloroform solution. Their compositions were 95/5, 90/10 and 80/20, respectively. To simulate ageing, SAN/EPDM blends were degraded at 140°C for several different time intervals and the degree of degradation was followed by IR spectroscopy and by determination of molar masses. To recover thermally degraded SAN/EPDM blends, in situ polymerization by addition of styrene monomer was applied. Characterization of SAN and EPDM, graft copolymer and gel was carried out in order to reveal the polymerization process. Extractions of the polymers were made using solvents in a Soxhlet equipment: SAN in a mixture of acetone/ methanol, EPDM in hexane, graft copolymer in tetrahydrofuran, while the remaining part was considered as gel. Identification of extracted polymers has been conducted by IR spectroscopy. The presence of graft copolymer in the polymerization mixture proved the grafting reaction of polymer radicals. The highest content of graft copolymer was obtained for SAN/EPDM polymer blends that were exposed to thermal treatment for the longest time interval of 90 h.

Quantitative ATR FT-IR Analysis of Surface Segregation of Polymer Blends of Polystyrene/Poly(Dimethylsiloxane)-co-polystyrene

1998 ◽  
Vol 52 (3) ◽  
pp. 361-366 ◽  
Author(s):  
Jiaxing Chen ◽  
Joseph A. Gardella
Keyword(s):  
Polymer Blends ◽  
Penetration Depth ◽  
Surface Segregation ◽  
Calibration Procedure ◽  
Attenuated Total Reflection ◽  
Depth Dependence ◽  
Quantitative Surface Analysis ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

The surface segregation of a series of two-component polymer blends of polystyrene/poly(dimethylsiloxane)-co-polystyrene has been studied by attenuated total reflection Fourier transform infrared (ATR FT-IR) spectroscopy. We examined the details of calibration for quantitative ATR FT-IR. The quantitation is based on calibration of Beer's law by transmission FT-IR measurements. The effect of spectral distortion and penetration depth dependence of radiation wavelength due to ATR sampling is evaluated. ATR spectra are corrected for penetration depth dependence before being used for quantitation. The corrected ATR spectra were compared with the transmission spectra of the same samples. Peak area ratios using one peak from each component were measured for the determination of the concentration of surface poly(dimethylsiloxane). The correction and calibration procedure improves the accuracy of quantitative surface analysis in the range of micrometer sampling depth. Unlike other approaches for quantification of ATR data on polymers, this method can be used for systems with a complex, unknown concentration gradient near the surface such as the blend system reported here.

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