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熔体结晶     
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  melt crystallization
     To the isothermal melt crystallization of s - PP, form Ⅰ and Ⅱ could develop as T c≥ 110 ℃ and T c < 110 ℃, respectively.
     结果表明:等温熔体结晶s-PP在TC<110℃形成晶型Ⅱ,Tc≥110℃则晶型Ⅱ和晶型Ⅰ同时出现;
短句来源
     In this paper,the isothermal melt crystallization of syndiotactic polystyrene was studied by WAXD, FTIR and DSC.
     用WAXD、FTIR和DSC方法研究了间规聚苯乙烯(SPS)的等温熔体结晶行为。
短句来源
     The effect of thermal history on the melt crystallization behavior of PET/PEN reactive blends were studied by DSC. And we further researched the isothermal crystallization kinetics.
     用差示扫描量热法 (DSC)研究了热历史对 PET/PEN反应性共混物的熔体结晶行为的影响 ,并进行了等温结晶动力学的测定。
短句来源
     The nucleation of diatomaceous earth(DE) in the melt crystallization of POM was studied by DSC and polarization microscope,and the effect of DE on the crystal from and crystallinity of POM was also analyzed by wide angle X—ray diffraction.
     本文借助DSC、偏光显微镜研究了硅澡土在聚甲醛(POM)熔体结晶过程中的成核作用,并通过广角X射线衍射分析了硅澡土对POM晶形和结晶度的影响。
短句来源
     With increasing phenoxy content, the cold crystallization temperature of PA66 in the blend increases, whereas the melting temperature and melt crystallization temperature, as well as the heat of fusion and the heat of crystallization decrease.
     随聚酚氧含量增加,尼龙66的冷结晶温度升高、熔融温度和熔体结晶温度降低,结晶和熔融温度范围变宽,熔融热和结晶热降低.
短句来源
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  crystallization of melt
     It was also discoveredthat the crystallization rate of melt was dependent on its cooling rate, and in the DSCthermogram of crystallization of melt the top values of exothermic peaks of crystallization ofmelt orderly changed to high temperature with decrease of cooling rate of melt.
     也发现熔体结晶速率依赖于降温速率,而且熔体结晶DSC热谱图上的放热结晶峰峰值位置随着降温速率减慢而有次序地向高温方向变迁。
短句来源
  melt crystallized
     = 0.7143(t= 130 Ma). The residual 20% melt crystallized to form the Shiziling granite with it I(?)
     =0.7143(t=130Ma),其余20%的残余熔体结晶后形成狮子岭岩体,其(?)
短句来源
     Hard elastic polypropylene hollow fiber were prepared from polypropylene melt crystallized under stress field.
     通过应力场下聚丙烯熔体结晶制备出硬弹性聚丙烯中空纤维 .
短句来源
     The results show that lamellae rows are parallel to each other and perpendicular to the extrusion direction when polypropylene melt crystallized under stress field.
     结果表明 ,应力场下聚丙烯熔体结晶 ,得到的硬弹性聚丙烯具有垂直于挤出方向而又平行堆积的片晶结构 (即排状堆积片晶 )。
短句来源
  melt crystal
     PURIFICATION PRINCIPLE AND METHOD OF TECHNICAL NAPHTHALENE BY MELT CRYSTAL IZATION
     熔体结晶法提纯工业萘的原理和方法
短句来源

 

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      melt crystallization
    Crystals of Li2TiGeO5 were obtained by solution-melt crystallization, and those of Na2TiGeO5 were grown from a melt by pulling.
          
    The microstructures of cast and annealed samples show a diffusion region that evolves at the HMS/Cr interface during the HMS melt crystallization on chromium flakes.
          
    Crystal chemical and energy analysis of partition coefficients of impurities during melt crystallization: The case of olivine
          
    The fluid phase that was liberated during melt crystallization severely affected the xenoliths, diminishing the difference between the isotope compositions of He and Ar in the xenoliths and ultramafic lamprophyres.
          
    Dating the duration of granite-melt crystallization at 15-20 km depth
          
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      crystallization of melt
    Surface crystallization of melt-spun Pd40Ni40P20 glass
          
    Crystallization of melt-spun Fe81P19 metallic glass
          
      melt crystallized
    Long periods in melt crystallized polyethylene two coexisting structures
          
    The Selective removal of Chain Defects (branches, unsaturations) by nitric acid from melt crystallized polyethylene is examined with reference to the question of the distribution of defects between crystalline and "amorphous" domains.
          
    Melt crystallized samples of mostly low density polyethylene were exposed to a bromine atmosphere, at room temperature, for long periods of time (3-30 h).
          
    Lamellar structure in melt crystallized low density polyethylene
          
    The "Vickers" micro-indentation hardness of a series of melt crystallized polyethylene (PE), plastically deformed PE and melt crystallized paraffins was determined to establish correlations with superstructure, i.
          
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      其他


    Melting point and heat of fusion of PET and its copolymers are studied.Theresults show that:(1)at temperature below its equilibrium melting point,PETmelt can crystallize and form crystals with high melting point.Equilibrium meltingpoint can be measured by relations of T_c and melting points or relations of mel-ting points of copolyesters and percentage of the third component;(2)heat of fu-sion of PET copolymers varys with the molecular structure of additive third com-ponent and its amount.Therfore,Flory's theory...

    Melting point and heat of fusion of PET and its copolymers are studied.Theresults show that:(1)at temperature below its equilibrium melting point,PETmelt can crystallize and form crystals with high melting point.Equilibrium meltingpoint can be measured by relations of T_c and melting points or relations of mel-ting points of copolyesters and percentage of the third component;(2)heat of fu-sion of PET copolymers varys with the molecular structure of additive third com-ponent and its amount.Therfore,Flory's theory must be corrected,since it didnot take accout of the effect of molecular structure of the third component on themolecular interreaction of polyester.This effect can be characterized by the dif-ferentia of heat of fusion of pure PET and that of copolyester when extraprola-ted to zero fraction of the third component.

    研究了涤纶(PET)及其共聚酯的熔点和熔化热,结果表明:①在平衡熔点以下温度,PET 熔体结晶并形成高熔点结晶,平衡熔点可用结晶温度(T_c)和熔点(T_m)关系,或用共聚酯的T_m 和第三组分含量关系外推得到.②PET 共聚物的熔化热随第三组分的分子结构和添加量而变,因此,Flory 理论须作修正。纯PET 的ΔH 与外推到第三组分含量为零时的共聚酯的ΔH 之差,可作为第三组分对共聚酯分子间相互作用影响大小的表征.

    We have synthesized poly (ethylene terephthalate) (PET), with two series of different catalysts in the process of esterexchange reaction.The catalyst effects the crystal behavior of PET was studied by DSC. The crystal behavior of PET by different catalysts is characterized by supercooled degree, superheated degree, peak of melt crystallization ect. It has been shown that the electronegativity (or lg β1) of metallic element involved in catalysts not only influence the cause of activity of catalyst, but also affect...

    We have synthesized poly (ethylene terephthalate) (PET), with two series of different catalysts in the process of esterexchange reaction.The catalyst effects the crystal behavior of PET was studied by DSC. The crystal behavior of PET by different catalysts is characterized by supercooled degree, superheated degree, peak of melt crystallization ect. It has been shown that the electronegativity (or lg β1) of metallic element involved in catalysts not only influence the cause of activity of catalyst, but also affect the crystal of PET in some way. It is probable the rate of forming crystal embryos is speeded up in presence of certain metallic ion of catalysts.

    用酯交换法合成了二个不同催化剂系列的聚对苯二甲酸乙二酯(PET),并用DSC研究了催化剂对PET结晶性能的影响。以过冷程度、过热程度、熔体结晶峰等表征它们的结晶性能。结果表明:催化剂中金属元素的电负性(或lgβ_1)不仅与其催化活性有关,而且在一定程度上影响PET的结晶,可能是催化剂中金属离子的存在加速了结晶的成核速度。

    The form and property of crystal of polybutandiol succinate (PBS) melt were studied byscanning electron microscopy (SEM) and differential scanning calorimtry (DSC) in this paper.It was discovered that the crystal form of melt was a ball crystal structure, and the size ofball crystal orderly increased with decrease of cooling rate of melt. It was also discoveredthat the crystallization rate of melt was dependent on its cooling rate, and in the DSCthermogram of crystallization of melt the top values of exothermic...

    The form and property of crystal of polybutandiol succinate (PBS) melt were studied byscanning electron microscopy (SEM) and differential scanning calorimtry (DSC) in this paper.It was discovered that the crystal form of melt was a ball crystal structure, and the size ofball crystal orderly increased with decrease of cooling rate of melt. It was also discoveredthat the crystallization rate of melt was dependent on its cooling rate, and in the DSCthermogram of crystallization of melt the top values of exothermic peaks of crystallization ofmelt orderly changed to high temperature with decrease of cooling rate of melt. Therefore, itmay be considered that the corresponding relationship existed between the size of ball crysralof melt and the top values of crystallization peaks of melt.

    本文采用扫描电子显微镜法(SEM)和差示扫描量热计法(DSC)研究了聚丁二酸丁二醇酯(PBS)熔体结晶形态和结晶性质。发现熔体结晶形态系为球晶结构,并且球晶的大小随着降温速率的减小而有规律地增大。也发现熔体结晶速率依赖于降温速率,而且熔体结晶DSC热谱图上的放热结晶峰峰值位置随着降温速率减慢而有次序地向高温方向变迁。因此,可以认为PBS熔体结晶时所形成的球晶大小与其在DSC热谱图中所产生的结晶峰峰值之间存在着对应的关系。

     
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