[Study on the peaks linked to the crystalline of L-LA with variable temperature FTIR spectra method].
Variable temperature FTIR spectra method was used to study the crystalline spectra of crystal compounds. In the present paper, the sample of L-LA was synthesized and characterized by FTIR, NMR and DSC. It was found that the two peaks in therange of 800-770 cm(-1) changed sharply at 95 degrees C after being investigated by FTIR spectra between 15-120 degrees C. When the temperature increased, these peaks remained almost unchanged, but they returned to the original state after annealing. It was deduced that these two peaks are linked to the crystalline of L-LA.
Chu
Yan-hong
YH
College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475001, China.
Zhang
Guo-bao
GB
Zhao
Gen-suo
GS
Yu
Shou-zhi
SZ
D003460:Crystallization; D019344:Lactic Acid / Q000138:chemical synthesis / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D011091:Polyesters / Q000737:chemistry; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods*; D013696:Temperature
D011091:Polyesters; D011108:Polymers; D019344:Lactic Acid; C033616:poly(lactide)