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第三届世界粘接及相关现象大会暨北京粘接学会第十五届学术年会

作者： charles c.Han State Key Laboratory of Polymer Physics and chemistry Joint Laboratory of Polymer Science and Materials Institute of chemistry Chinese Academy of Sciences

The correlation between liquid-liquid phase separation(LLPS) and crystallization at several compositions in statistical copolymer blends of poly(ethylene-co-hexene)(PEH) and poly(ethylene-co-butene)(PEB) has been examined by optical microscopy(OM),atomic force microscopy(AFM) and differential scanning calorimetry (DSc).The overwhelming change in the crystallization kinetics due to the density fluctuation caused by the spontaneous spinodal LLPS is *** coupling mechanism suggests a new mechanism in the nucleation -crystallization *** evidences are pointing to a cross-over mechanism from the spinodal fluctuations

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Nascent Morphology of In-reactor Polyolefin Blends and the Influence of Phase Separation on the crystallization Morphology

Nascent Morphology of In-reactor Polyolefin Blends and the I...

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2010年全国高分子材料科学与工程研讨会

作者： charles c.Han Joint Laboratory of Polymer Science and Materials Institute of ChemistryChinese Academy of Sciences

＜正＞Due to the cost advantage and the recycle/re-use potential,polyolefin blends/alloys have become the largest group of commodity plastics,and have the potential to replace the market of many traditional engineering *** the other hand,these polymers with the simplest chemical structures have brought many challenges in chemistry and in physics in order to develop further technological

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Interactive phase separation and crystallization with and without the influence of glass transition

Interactive phase separation and crystallization with and wi...

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2011年全国高分子学术论文报告会

作者： charles c.Han Beijing National Laboratory for Molecular Sciences Joint Laboratory of Polymer Science and MaterialsInstitute of ChemistryChinese Academy of Sciences

＜正＞Interplay between crystallization and phase separation is investigated in a dynamically asymmetric polymer blend. The dynamics of phase separation is greatly enhanced by concentration deviation

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Synthesis and characterization of ABA Type Fluorine containing Polyurethane copolymers

Synthesis and Characterization of ABA Type Fluorine Containi...

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2007年全国高分子学术论文报告会

作者： charles c．Han Beijing National Laboratory for Molecular Sciences Joint Laboratory of Polymer Science and Materials State Key Laboratory of Polymer Physics and ChemistryInstitute of ChemistryCASBeijing 100080China

＜正＞ABA type fluorine containing polyurethane block copolymersd（FPU）were synthesized from 4,4′-methylene-bis-（phenylisocyanate）,polytetrahydrofuran（Mn= 2000）and monofunctional perfluoropolyether alcohol using... 详细信息

关键词： fluorine polyurethanes XPS contact angle hydrophobic

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Neutron Scattering of Polymers

Neutron Scattering of Polymers

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ccAST“散裂中子源多学科应用”研讨会

作者： charles c.Han Joint Laboratory of Polymer Science and Materials Institute of chemistry the Chinese Academy of Sciences

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Some chemical and Physical Aspects in the Applications of Polyolefin Blends/Alloys

Some Chemical and Physical Aspects in the Applications of Po...

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2006年海峡两岸高分子学术研讨会

作者： charles c. Han State Key Laboratory of Polymer Physics and chemistry Joint Laboratory of Polymer Science and Materials IccAS Beijing 100080

＜正＞Olefin polymers are the most widely used materials in the plastic industries today. To optimize their properties and processibility, blending/alloying process is often being used. This is particularly true for the toughened injection grades of polyisoprene/polyolefin elastomer blends/alloys. These are the type of materials widely used in the automobiles and appliances applications which has become more and more important due to the current day pressure of energy shortage and environmental protection problem.

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Electrospun Fibers of Fluorine containing Polyurethane

Electrospun Fibers of Fluorine Containing Polyurethane

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2007年全国高分子学术论文报告会

＜正＞Electrospinning is a novel and efficient method that can be utilized to form polymer *** containing polyurethanes possess tuning flexibility,excellent elongation and ***,they can present low surface *** non-woven fiber mats were prepared from the fluorine containing polyurethanes using a THF *** fibers range from 2 to 4 micrometers in *** surface of the fibers mat represents good hydrophobic *** water contact angle with a 5.0μL water droplet on the surface is in the range of 142～147°.The mats show well elongation. No breaking of fibers was found even if the fibers were stretched with diameter shrank to one third of *** fibers could almost get back to original state when the force was *** mats can be rolled easily.

关键词： electrospun fiber fluorine polyurethanes hydrophobic

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challenges of making Performance Plastics from Polyolefins:In the Structure/Property controlOf Polyolefin Blends/Alloys

Challenges of making Performance Plastics from Polyolefins:I...

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2004年全国高分子材料科学与工程研讨会

作者： Han charles c. State Key Laboratory of Polymer Physics and chemistry Joint Laboratory of Polymer Science and Materials IccAS BeijingChina100080

＜正＞ Olefin polymers are the most widely used materials in the plastics industry *** their properties and processibility,blending/alloying is often *** isparticularly important for the metallocene—catalyst based *** the other hand,inorder to make low cost performance and recyclable plastics,polyolefin blends/alloys havebecome the primary choice in recent ***,there are many challenges in catalystsdevelopment,polymerization chemistry,composition formulation,structure/morphology and processing control need to be solved before such low cost,highperformance plastics can be produced.

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Structure and Morphology characterization of Polymer Blends under Multiple Phase Transitions

Structure and Morphology Characterization of Polymer Blends ...

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2012年全国高分子材料科学与工程研讨会

作者： HAN,charles c. Joint Laboratory of Polymer Science and Materials Institute of ChemistryChinese Academy of Sciences

In a realistic polymer blend system,for example:a polyolefin blend or a toughened polystyrene system,phase separation is often encountered together with either crystallization or glass transition or sometimes *** will make the phase separation kinetics very complicated,so is the morphology and the properties of the *** most common cases include the interactive phase separation and crystallization,and /or asymmetrical phase separation due to the large molecular weight difference or glass transition temperatures difference between the *** situation could become much more complicated when all three transitions are close to each other and interact with each other spatially as well as temporally.

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Forage and breed effects on behavior and temperament of pregnant beef heifers

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Journal of Animal Science and Biotechnology 2013年第3期4卷 165-169页

作者： Angela R Mays Michael L Looper Benjamin c Williamson Kenneth P coffey Wayne K coblentz Glen E Aiken charles F Rosenkrans Jr Department of Animal Science University of ArkansasFayetteville AR 72701 USA Department of Agricultural Sciences Morehead StateUniversity327 Reed Hall Morehead KY 40351 USA USDA-ARS US Dairy Forage Research CenterMarshfield WI 54449 USA USDA-ARS Forage Animal Production Research UnitLexingtonKY 40546 USA

Background： Integration of behavioral observations with traditional selection schemes may lead to enhanced animal well-being and more profitable forage-based cattle production ***-influenced（BR;n = 64） and Gelbvieh × Angus（GA;n = 64） heifers consumed either toxic endophyte-infected tall fescue（E＋） or one of two nontoxic endophyte-infected tall fescue（NT） cultivars during two *** were weighed at midpoint and termination of *** behavior（grazing,resting in the shade,lying,or standing without grazing） was recorded（n = 13 visual observations per yr in June and July） for each *** yr 2,exit velocity（EV） and serum prolactin（PRL） were ***： Grazing behavior was influenced（P 0.05） by an interaction between fescue cultivar and breed *** × Angus heifers assigned to E＋ pastures had the lowest percentage of animals grazing and the largest percentage of animals resting in the ***-influenced heifers had faster EV（P 0.001） than GA heifers（0.52 vs.0.74 ± 0.04 s/m,respectively）.Body weight（BW） was affected（P 0.01） by an interaction of tall fescue cultivar and d,and an interaction of tall fescue cultivar and breed *** grazing NT pastures were heavier（P 0.01） than heifers grazing E＋ pastures at midpoint and *** × Angus heifers grazing NT pastures were heavier（P 0.01） than GA and BR heifers grazing E＋ and BR heifers grazing NT *** interaction of forage cultivar and breed type occurred on serum PRL（P 0.01）.conclusion： collectively fescue cultivar,EV,and concentrations of serum PRL were associated with grazing *** grazing NT pastures were observed to be grazing more than heifers assigned to E＋ pastures,regardless of breed type,which may have contributed to changes in BW and average daily gain（ADG） in *** of behavioral observations along with traditional selection schemes may lead to enhanced animal well-being and more profitable forage-based cattle prod

关键词： cattle Endophyte-infected tall fescue Grazing behavior Prolactin Temperament

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