Unique Homo-Crystallization and Melting Behavior of Poly(L-lactic acid): Influence of Stereocomplex with Varied Structure

2014 ◽  
Vol 54 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Huijun Xu ◽  
Songchao Tang ◽  
Jianding Chen ◽  
Nan Chen
Keyword(s):  
Lactic Acid ◽  
Melting Behavior ◽  
Varied Structure ◽  
Crystallization And Melting Behavior

scholarly journals Crystallization and Melting Behavior of Biodegradable Poly(L-lactic acid)/Talc Composites

2012 ◽  
Vol 9 (3) ◽  
pp. 1569-1574 ◽  
Author(s):  
Yan-Hua Cai
Keyword(s):  
Lactic Acid ◽  
Heating Rate ◽  
Isothermal Crystallization ◽  
Crystallization Rate ◽  
Melting Behavior ◽  
Melting Peak ◽  
Melt Crystallization ◽  
Biodegradable Poly ◽  
Crystallization And Melting Behavior ◽  
Double Melting Peak

Crystallization and melting behavior of Poly(L-lactic acid)(PLLA)/Talc composites with different talc content were investigated in detail. The addition of talc can increase the overall crystallization rate of PLLA, 5%talc makes the melt-crystallization peak temperature of PLLA increase from 96.28 °C to 105.22 °C, and the crystallization enthalpy increases from 1.379 J•g-1to 28.99 J•g-1. The melting behavior of PLLA/5%talc composites at a different heating rate during non-isothermal crystallization at different cooling rate shows that heating rate can affect the melting behavior of PLLA, with increasing of heating rate, the double melting peak degenerates to single melting peak. Melting behavior after isothermal crystallization and after cold isothermal crystallization and hot isothermal crystallization indicates that the double-melting peak of PLLA/5%talc composites results from melting-recrystallization.

Crystallization and Melting Behavior of Poly (l-lactic Acid)

2007 ◽  
Vol 40 (26) ◽  
pp. 9463-9469 ◽  
Author(s):  
Takahiko Kawai ◽  
Nelly Rahman ◽  
Go Matsuba ◽  
Koji Nishida ◽  
Toshiji Kanaya ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Melting Behavior ◽  
Crystallization And Melting Behavior

Crystallization and melting behavior of silica nanoparticles and poly(ethylene 2,6-naphthalate) hybrid nanocomposites

2006 ◽  
Vol 14 (2) ◽  
pp. 146-154 ◽  
Author(s):  
Jun Young Kim ◽  
Seong Hun Kim ◽  
Seong Wook Kang ◽  
Jin-Hae Chang ◽  
Seon Hoon Ahn
Keyword(s):  
Silica Nanoparticles ◽  
Melting Behavior ◽  
Hybrid Nanocomposites ◽  
Poly Ethylene ◽  
Crystallization And Melting Behavior

Crystallization and melting behavior of polyester/clay nanocomposites

2004 ◽  
Vol 53 (9) ◽  
pp. 1282-1289 ◽  
Author(s):  
In Yee Phang ◽  
KP Pramoda ◽  
Tianxi Liu ◽  
Chaobin He
Keyword(s):  
Melting Behavior ◽  
Clay Nanocomposites ◽  
Crystallization And Melting Behavior

scholarly journals The Effect of WS2 Nanosheets on the Non-Isothermal Cold- and Melt-Crystallization Kinetics of Poly(l-lactic acid) Nanocomposites

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2214
Author(s):  
Mohammed Naffakh ◽  
Pablo Rica ◽  
Carmen Moya-Lopez ◽  
José Antonio Castro-Osma ◽  
Carlos Alonso-Moreno ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Transition Metal Dichalcogenides ◽  
Crystallization Rate ◽  
Melting Behavior ◽  
Hybrid Nanocomposites ◽  
Melt Crystallization ◽  
Heating Rates ◽  
Solution Blending ◽  
New Perspective ◽  
Ws2 Nanosheets

In the present work, hybrid nanocomposite materials were obtained by a solution blending of poly(l-lactic acid) (PLLA) and layered transition-metal dichalcogenides (TMDCs) based on tungsten disulfide nanosheets (2D-WS2) as a filler, varying its content between 0 and 1 wt%. The non-isothermal cold- and melt-crystallization and melting behavior of PLLA/2D-WS2 were investigated. The overall crystallization rate, final crystallinity, and subsequent melting behavior of PLLA were controlled by both the incorporation of 2D-WS2 and variation of the cooling/heating rates. In particular, the analysis of the cold-crystallization behavior of the PLLA matrix showed that the crystallization rate of PLLA was reduced after nanosheet incorporation. Unexpectedly for polymer nanocomposites, a drastic change from retardation to promotion of crystallization was observed with increasing the nanosheet content, while the melt-crystallization mechanism of PLLA remained unchanged. On the other hand, the double-melting peaks, mainly derived from melting–recrystallization–melting processes upon heating, and their dynamic behavior were coherent with the effect of 2D-WS2 involved in the crystallization of PLLA. Therefore, the results of the present study offer a new perspective for the potential of PLLA/hybrid nanocomposites in targeted applications.

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