Crystallization of poly(butylene adipate) in the presence of nucleating agents
Crystallization of poly(butylene adipate) in the presence of nucleating agents
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DOI：
10.1002/polb.20523
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发表时间：
2005-09
期刊：
影响因子：
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通讯作者：
Weihua Kai;Bo Zhu;Yong He;Y. Inoue
中科院分区：
文献类型：
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作者：
Weihua Kai;Bo Zhu;Yong He;Y. Inoue
采用滑石和氮化硼等4种市售成核剂，研究了成核剂对聚己二酸丁二烯（PBA）多晶化行为的影响。用广角x射线衍射研究了α型和β型的晶体结构。采用差示扫描量热法和偏光显微镜研究了在无成核剂和有成核剂的情况下，PBA在等温结晶和非等温结晶过程中β- α-晶体的转变。在等温结晶和非等温结晶过程中，α-型晶体的成核均选择性地由成核剂的引入引发，而在无成核剂的条件下，α-型晶体的成核过程相对缓慢。通过非等温结晶、球晶形貌和等温动力学研究，确定了四种成核剂在PBA α-型晶体结晶过程中的成核活性。
The effect of nucleating agents on the polymorphic crystallization behavior of poly(butylene adipate) (PBA) was studied with four kinds of commercially available nucleating agents, such as talc and boron nitride. The crystal structures of the α and β forms were studied with wide-angle X-ray diffraction. The β-to-α-crystal transformation of PBA in the absence and presence of the nucleating agents in isothermal crystallization and nonisothermal crystallization processes was studied with differential scanning calorimetry and polarized optical microscopy. In both isothermal and nonisothermal crystallization, the introduction of nucleating agents selectively initiated the nucleation of the α-form crystal, which was relatively slow in the absence of nucleating agents. The nucleating activity of the four kinds of nucleating agents in the crystallization of the PBA α-form crystal was determined by the study of the nonisothermal crystallization, spherulite morphology, and isothermal kinetics.