Melting Behavior of Poly(L lactide)

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$A Newtonian approach to extraordinarily strong negative refraction$

IR spectra of the C=O stretching band (1810-1710 cm-1) (dominant band) Figure 5. IR spectra in the 1810-1710 Figure 5. IR spectra in the 1810 1710 cm-1 region of amorphous and crystalline PLLA15 isothermally meltcrystallized at T c = 80-140 °C. so weak three new bands shifts toward lower wavenumber side by about 1 cm-1
WAXD patterns and IR spectra 100-120 °C : the mixture of α΄- and α-form crystals y α -form crystal is produced at high T c α΄ -form crystal is produced at low T c the crystallization kinetics change discontinuously (Figure 2) According to Zhang et al., -both the α΄- and α -form crystals have the same 103 helix chain conformation and orthorhombic unit cell - the packing of the side groups in the helical chains of the α΄-form crystal is less ordered and looser than that of the R-form crystal. Because the different crystal modifications usually have the different crystallization kinetics(the different nucleation or growth mechanisms) , it is reasonable to consider that the discontinuousness of crystallization kinetics is due to the polymorphism of PLLA.
Page 1 and 2: Polymorphous Crystallization and Mu
Page 3 and 4: The crystal structure and morpholog
Page 5 and 6: Polarized Optical Microscopy (POM)
Page 7 and 8: peak k shifts hift Difference of ~1
Page 9 and 10: the effect of T c on the crystalliz
Page 11: Crystalline Structure two dominant
Page 15 and 16: In Situ Observation on Polymorphic
Page 17 and 18: Figure 9. Temperature-dependent IR
Page 19 and 20: In Situ Observation on Polymorphic
Page 21: Conclusions the melting of PLLA is

Melting Behavior of Poly(L lactide)

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