Liu, W. L.; Lyu, M. F.; Zhang, H. Y.; Liu, J. Y.; Zhang, S. J. Preparation and rheological characterization of long chain branching polyglycolide. Chinese J. Polym. Sci. 2024, 42, 1177–1184
Wei-Lin Liu, Ming-Fu Lyu, Heng-Yuan Zhang, et al. Preparation and Rheological Characterization of Long Chain Branching Polyglycolide[J]. Chinese Journal of Polymer Science, 2024, 42(8): 1177-1184.
Liu, W. L.; Lyu, M. F.; Zhang, H. Y.; Liu, J. Y.; Zhang, S. J. Preparation and rheological characterization of long chain branching polyglycolide. Chinese J. Polym. Sci. 2024, 42, 1177–1184DOI: 10.1007/s10118-024-3118-4.
Wei-Lin Liu, Ming-Fu Lyu, Heng-Yuan Zhang, et al. Preparation and Rheological Characterization of Long Chain Branching Polyglycolide[J]. Chinese Journal of Polymer Science, 2024, 42(8): 1177-1184.DOI: 10.1007/s10118-024-3118-4.
Preparation and Rheological Characterization of Long Chain Branching Polyglycolide
long chain branching (LCB) PGA was prepared by two-step functional group reaction method and the structure of LCB was fully characterized by rheology. It is clear that the melt strength of the modified PGA has been greatly improved.
Abstract
The long chain branching (LCB) polyglycolide (PGA) was successfully prepared by the successive reactions of the terminal hydroxyl groups of PGA with triglycidyl isocyanurate (TGIC) and pyromellitic dianhydride (PMDA). The influence of LCB produced by functional group reaction on rheological and crystallization behavior was studied and discussed through linear rheol
ogy
uniaxial elongation and DSC (differential scanning calorimetry). The much higher viscosity and the more notable strain hardening behavior of modified PGA indicates the LCB with high degree of entanglements are created. The melt strength of PGA is finally improved greatly and can make sure that the supercritical CO
2
foaming can be carried out successfully.
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references
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