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首页> 外文期刊>Journal of Applied Polymer Science >Thermally induced phase separation in poly(lactic acid)/dialkyl phthalate systems
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Thermally induced phase separation in poly(lactic acid)/dialkyl phthalate systems

机译：聚乳酸/邻苯二甲酸二烷基酯体系中的热诱导相分离

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Thermally induced phase separation in poly(lactic acid)/dialkyl phthalate systems was investigated. Poly(DL-lactic acid) (PDLLA) and poly(L-lactic acid) (PLLA) with different molecular weights were used. A series of dialkyl phthalates, with different numbers of carbon atoms in the alkyl chain, were employed as solvents to control the interaction between polymer and solvent. The liquid-liquid phase-separation temperature of the poly(lactic acid) solutions decreased systematically with a shorter alkyl chain in the phthalate. Based on the interaction between polymer and solvent and the molecular weight of polymer influencing liquid-liquid phase-separation temperature significantly but crystallization temperature only slightly, proper thermal conditions were employed to investigate competitive phase separation and crystallization in PLLA solutions. Factors that can influence the final morphology of PLLA solutions were examined. (C) 2003 Wiley Periodicals, Inc. [References: 28]
机译：研究了聚乳酸/邻苯二甲酸二烷基酯体系中的热诱导相分离。使用具有不同分子量的聚（DL-乳酸）（PDLLA）和聚（L-乳酸）（PLLA）。使用一系列在烷基链中具有不同碳原子数的邻苯二甲酸二烷基酯作为溶剂，以控制聚合物与溶剂之间的相互作用。聚乳酸溶液的液-液相分离温度随着邻苯二甲酸酯中较短的烷基链而系统地降低。基于聚合物与溶剂之间的相互作用以及聚合物的分子量对液-液相分离温度有显着影响，而对结晶温度的影响很小，因此采用适当的热条件研究PLLA溶液中竞争相的分离和结晶。研究了可能影响PLLA溶液最终形态的因素。 （C）2003 Wiley Periodicals，Inc. [参考：28]

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