Temperature dependent variations in the lamellar structure of poly(l-lactide)

Equilibrium Melting Temperature of Poly(ferrocenyl dimethylsilane) in Homopolymers and Lamellar Diblock Copolymers with Polystyrene

“…[42] For PLLA, moreover, the data from the normal and self-seeding crystallizations fall on the same linear T m versus 1/d c curve. [43] Obviously, self-seeding does not influence the T m versus T c nor the T m versus 1/d c behavior. Nevertheless, we carried out additional studies to reconfirm that aspect explicitly for PFDMS.…”

Confirmation of Disorder α Form of Poly(L‐lactic acid) by the X‐ray Fiber Pattern and Polarized IR/Raman Spectra Measured for Uniaxially‐Oriented Samples

“…Macroscopic size of PLLA spherulites grown at high T c is in the order of several hundreds mm, while only tiny crystal is observed at low T c . [7] Additionally, the crystal thicknesses and long period have a minimum at 120 8C and increase at both of higher and lower crystallization temperatures. [7] In order to explain these peculiar crystallization behaviors of PLLA a form, several authors proposed recently that there might be a new crystal modification named a 0 -form or disorder a form when PLLA crystallizes at temperature lower than 120 8C.…”

“…[7] Additionally, the crystal thicknesses and long period have a minimum at 120 8C and increase at both of higher and lower crystallization temperatures. [7] In order to explain these peculiar crystallization behaviors of PLLA a form, several authors proposed recently that there might be a new crystal modification named a 0 -form or disorder a form when PLLA crystallizes at temperature lower than 120 8C. [7,8] This new crystal modification, different from the order a form, is supported by the experimental data of X-ray powder pattern and IR data.…”

Electrospun scaffolds of polylactide with a different enantiomeric content and loaded with anti-inflammatory and antibacterial drugs

“…Determined by considering an estimated melting enthalpy of 106 J·g -1 for a 100% crystalline sample. 39,40 Left and right values correspond to crystallinities deduced for the as electrospun material (i.e., considering ΔH m -ΔH c as the enthalpy associated to crystalline phase of the electrospun sample) and those attained after cold crystallization (i.e., considering ΔH m as the enthalpy associated to the final crystalline phase), respectively. of TCS and KTP from PLA 2002D scaffolds after 8 h of exposure to PBS medium rose to 40% and 30%, respectively (Figure 6(a)), while these percentages decreased to 30% and 5% for a similar exposure time when PLA 4032D scaffolds were employed (Figure 6(c)).…”