Morphology evolution and location of ethylene-propylene copolymer in annealed polyethylene/polypropylene blends

Li, Lin; Chen, Liusheng; Bruin, Peter de; Winnik, Mitchell A.

doi:10.1002/(sici)1099-0488(19970430)35:6<979::aid-polb12>3.0.co;2-c

Cited by 26 publications

(34 citation statements)

References 4 publications

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“…Figure 2 for the 85/15 HPC/HDPE blend shows whitening diameter almost unchanged or a little increase compared to the 90/10 HPC/HDPE blend at all impact energies. It is known that in ternary blends of EPR, PP, and HDPE, the amount of HDPE being encapsulated by EPR is limited by the volume of EPR in HPC 7, 19–23. Experimentally, it has been reported that EPR and EPDM are somewhat more miscible with PE than PP and there is some indication of an interpenetrating structure between EPR and PE 24.…”

Section: Resultsmentioning

confidence: 99%

Molecular scanning of the beta-3-adrenergic receptor gene in Pima Indians and Caucasians

Silver

Walston

Yang

et al. 1999

Diabetes Metab. Res. Rev.

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Section: Resultsmentioning

confidence: 99%

Molecular scanning of the beta-3-adrenergic receptor gene in Pima Indians and Caucasians

Silver

Walston

Yang

et al. 1999

Diabetes Metab. Res. Rev.

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“…The labeling reaction of maleated PEB with EF2 was carried out according to ref. [16]. Due to the tiny amount of fluorescent dye in the blend, the fluorescein labeled PEB component is believed not to affect the phase behavior of HDPE/PEB blend.…”

Section: Preparation Of Fluorescein Labeled Pebmentioning

confidence: 99%

“…The scattering technique such as light scattering (LS) [3][4][5][6][7][8] , neutron scattering (NS) [9][10][11][12] , and real space observation such as transmission electron microscopy (TEM) and optical microscopy (OM) [13][14][15] have been used to carry out such studies. Recently, LSCM gradually becomes a powerful imaging tool to observe the three-dimensionally phase-separated morphology in the area of polymer blends [16][17][18][19][20] . In this technique, the contrast is provided by small quantities of a fluorescent dye added to the system.…”

mentioning

confidence: 99%

Three-dimensional observation of the phase structure of high density polyethylene (HDPE)/poly(ethylene-co-butene) (PEB) blend by laser scanning confocal microscopy

et al. 2007

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In this paper, high density polyethylene (HDPE)/poly(ethylene-co-butene) (PEB) blend (50/50 wt%) was prepared through solution blending and then compression molding, and subsequently examined by laser scanning confocal microscopy (LSCM). The PEB used in this experiment was labeled with a small quantity of a fluorescein derivative to render fluorescence. The initial films showed uniform dye distribution and no indication of phase separation within the resolution of optical microscopy. Sample films annealing at 140℃ followed by rapid cooling to room temperature showed obvious phase separation and bicontinuous structure. The present work indicates that by labeling one component with fluorescein derivative, LSCM can efficiently perform in situ depth profiling of polymer blends.laser scanning confocal microscopy, HDPE/PEB blend, morphology, miscibility The blending of two or more polymers has gained considerable importance in recent years because the blends usually give rise to certain properties that cannot be attained from individual components. A large amount of research work has been carried out over the last several years with a view to obtain new polymeric materials with enhanced properties for specific application and for better combination of different properties [1,2] . The best commercial advantages of polymer blend are versatility. Unfortunately, miscible polymer-polymer blends usually show additivity of the component polymer properties, thus their versatility is limited. The interest in miscible polymer blends is the compatibilization and judicious selection of the processing conditions that may lead to the spinodal decomposition-type morphology.Over the last two decades, many studies have been conducted on the dynamics and morphology formation of polymer blends undergoing spinodal decomposition (SD). The scattering technique such as light scattering (LS) [3][4][5][6][7][8] , neutron scattering (NS) [9][10][11][12] , and real space observation such as transmission electron microscopy (TEM) and optical microscopy (OM) [13][14][15] have been used to carry out such studies. Recently, LSCM gradually becomes a powerful imaging tool to observe the three-dimensionally phase-separated morphology in the area of polymer blends [16][17][18][19][20] . In this technique, the contrast is provided by small quantities of a fluorescent dye added to the system. Because of the confocal optics of the LSCM instrument, optical sections at different depths can be obtained simply by changing the focus, as light from a single thin focal plane reaches the detector

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“…It was found that the dispersed domain size decreased with increased mixing energy. Li17 and Moon18 found that the size of the dispersed phase would reduce when the compatibilizer was added to the blends.…”

Section: Introductionmentioning

confidence: 99%

Morphology evolution of immiscible LDPE/PVC blends in the presence of compatibilizer and phase dispersant

Fang

Liu

et al. 2003

J of Applied Polymer Sci

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Phase dispersion and coalescence in lowdensity polyethylene (LDPE)/polyvinyl chloride (PVC) (70/ 30) blends influenced by compatibilizer and phase dispersant was studied. It was found that the morphology evolution of blends is sensitive to not only processing conditions (shear strength and mixing time) but also the added compatibilizer or phase dispersant. In our conditions, the stable phase morphology of each blend is obtained after mixing 15-25 min. In addition, the dispersed PVC phase in blends is easy to aggregate when the mixing rotor speed changed from high to low for the binary blends. As a compatibilizer, chlorided polyethylene (CPE) or nitrile rubber (NBR) can stabilize the morphology and hinder the coalescence of the dispersed PVC phase when added to the blends. However, the phase dispersant butadiene rubber (BR) or styrene butadiene rubber (SBR) could not stabilize the phase structure, although it could accelerate phase dispersion.

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Morphology evolution and location of ethylene-propylene copolymer in annealed polyethylene/polypropylene blends

Cited by 26 publications

References 4 publications

Molecular scanning of the beta-3-adrenergic receptor gene in Pima Indians and Caucasians

Molecular scanning of the beta-3-adrenergic receptor gene in Pima Indians and Caucasians

Three-dimensional observation of the phase structure of high density polyethylene (HDPE)/poly(ethylene-co-butene) (PEB) blend by laser scanning confocal microscopy

Morphology evolution of immiscible LDPE/PVC blends in the presence of compatibilizer and phase dispersant

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