硬脂酸镧复合物对聚丙烯β晶型的诱导作用
경지산란복합물대취병희β정형적유도작용
Lanthanum Stearate Composite Act as β-Modification Nucleating Agent of Isotatic Polypropylene
  • 万方数据
    高等学校化学学报 고등학교화학학보
    CHEMICAL JOURNAL OF CHINESE UNIVERSITIES
    2001年 1期 154-156 ,共3页

    冯嘉春%黄志镗%陈鸣才

    풍가춘%황지당%진명재

    硬脂酸镧%等规聚丙烯%β晶型 硬脂痠鑭%等規聚丙烯%β晶型
    경지산란%등규취병희%β정형


    A composite of 60％ of lanthanum stearate and 40% (mass fraction) of stearic acid was prepared and its influence on the crystallization characteristics of isotatic polypropylene (iPP) was investigated.The results showed that we had found a new kind ofβ-crystalline form nucleating agent.The composite might induced rather high proportion of β-modification.The relative content ofβ-phase estimated by WAXD and DSC was 30％ and 51.8％ in a PP containing 2.5％(mass fraction) of the composite respectively.The isothermal crystallization at 130℃ and melting behavior examined by DSC revealed that the composite accelerated the overall rate of crystallization remarkably.The half crystallization period t1/2 decreased from 11.8 min of pure PP to 7.5 min of PP containing 2.5％ of the composite.However,the composite had no obvious influence on crystallization mode and the size of a-crystal unit cell.
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