左右旋聚乳酸摻合物對左旋聚乳酸結晶行為的影響

黃祖浩

doi:10.6342/NTU.2013.02153

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左右旋聚乳酸摻合物對左旋聚乳酸結晶行為的影響

Effects of Stereocomplex on Crystallization Behavior of PLLA

黃祖浩 , Masters　　Advisor：廖文彬　　

繁體中文 DOI： 10.6342/NTU.2013.02153

聚乳酸；左右旋聚乳酸摻合物；結晶動力學；型態學； PLLA ； Stereocomplex ； crystallization kinetics ； morphology

Abstract │ Reference (54) │ Altmetrics

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This research focuses on the Stereocomplex addition how to affect crystal behavior and morphology of PLLA. PLLA polymer chains packed closely α form crystal structure at higher crystallization temperature, and loosely α’ form crystal structure at lower crystallization temperature. Two crystal structures can co-exist at moderate temperatue. It is investigated by POM, DSC and XRD to observe the crystal behavior changes of PLLA/Stereocomplex.
 
Due to the effect of Stereocomplex, the α and α’ coexistence zone of PLLA/ Stereocomplex system changes from 120℃~105℃ to 135℃~95℃. Because Stereocomplex can help PLLA nucleate, the α’ form crystal structure, which is nucleation control, can have more ability to nucleate at higher temperature. Furthermore, we add some impurity in PLLA, PLLA spherulite may encounter some obstacles, thus making growth rate decreases. On the other hand, the α and α’ kinetic competition model does not change when we add Stereocomplex into PLLA. As the above mentioned, the two factors make the coexistence zone change.

In POM, PLLA spherulite crystallizes between the Stereocomplex spherulite's bundle; when we change the Stereocomplex amounts, internal - PLLA、SC - PLLA and amorphous - PLLA can be observed. Because of these three crystal, we can know the impurity-added effect is the main factor resulting in growth rate decreament, and Stereocomplex crystal is the main factor to assist PLLA to nucleate.

Reference ( 54 ) 〈TOP〉

4. Richard, A. Gross and B. Kalra, Biodegradable Polymers for the Environment. Science, 2002,297,803
連結：
7. Vasanthakumari, R.; Pennings, AJ. Polymer 1983,24,175
連結：
9. Kalb, B.; Pennings, AJ. Polymer 1980,21,607
連結：
10. W. C. Lai; W. B. Liau, Polymer 2003,44, 8103
連結：
11. Vahik, K.; Darrin, J. P. Macromolecules 2004,37,6480
連結：

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