Abstract
Well-defined A-block-B type cellulose derivatives consisting of cellulose triacetate (CTA) and oligoamide-15 were synthesized. Chemical structures of the diblock copolymers were characterized by MALDI-TOF MS, 1H-NMR, and GPC. Influence of length of CTA and oligoamide-15 segments on their thermal properties was investigated by means of differential scanning calorimetry (DSC). All diblock copolymers displayed T g, T c, and T m transition temperatures. Their T g and T m values increased with the increase of molecular weight of CTA segment. The crystallinity of diblock copolymers increased after isothermal crystallization at 200 °C. Its X-ray analysis revealed that the diblock copolymer had CTA II crystal structure. Thermal analysis supported microphase separation between CTA and oligoamide-15 segments at room temperature, because T g and T m values of polyamide-15 are −7 °C and 170–180 °C, respectively.
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Abbreviations
- CTA:
-
Cellulose triacetate
- GPC:
-
Gel permeation chromatography
- MALDI-TOF MS:
-
Matrix assisted laser desorption/ionization time-of-flight mass spectroscopy
- DSC:
-
differential scanning calorimetry
- DPn :
-
Number-average degree of polymerization
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Kamitakahara, H., Enomoto, Y., Hasegawa, C. et al. Synthesis of Diblock Copolymers With Cellulose Derivatives. 2. Characterization and Thermal Properties of Cellulose Triacetate-Block-Oligoamide-15. Cellulose 12, 527–541 (2005). https://doi.org/10.1007/s10570-005-7135-3
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DOI: https://doi.org/10.1007/s10570-005-7135-3