A STUDY OF STRUCTURE AND PROPERTY CHANGES OF BIODEGRADABLE POLYGLYCOLIDE AND POLY(GLYCOLIDE-co-LACTIDE)FIBERS DURING PROCESSING AND IN VITRO DEGRADATION*

Your Location：

Home >

Browse articles >

A STUDY OF STRUCTURE AND PROPERTY CHANGES OF BIODEGRADABLE POLYGLYCOLIDE AND POLY(GLYCOLIDE-co-LACTIDE)FIBERS DURING PROCESSING AND IN VITRO DEGRADATION*

Papers | Updated：2021-06-21

- A STUDY OF STRUCTURE AND PROPERTY CHANGES OF BIODEGRADABLE POLYGLYCOLIDE AND POLY(GLYCOLIDE-co-LACTIDE)FIBERS DURING PROCESSING AND IN VITRO DEGRADATION*
- Vol. 21, Issue 2, Pages: 159-167(2003)
- Affiliations：
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：20 April 2003
- Accepted：
Scan QR Code
A STUDY OF STRUCTURE AND PROPERTY CHANGES OF BIODEGRADABLE POLYGLYCOLIDE AND POLY(GLYCOLIDE-co-LACTIDE)FIBERS DURING PROCESSING AND IN VITRO DEGRADATION*[J]. 2003, 21(2): 159-167.
DOI：

A STUDY OF STRUCTURE AND PROPERTY CHANGES OF BIODEGRADABLE POLYGLYCOLIDE AND POLY(GLYCOLIDE-co-LACTIDE)FIBERS DURING PROCESSING AND IN VITRO DEGRADATION*[J]. 2003, 21(2): 159-167. DOI：

摘要

Structure and properties of bioabsorbable polyglycolide (PGA) and poly(glycolide-co-lactide) (PGA-co-PLA)fibers were investigated during several industrial processing stages and in vitro degradation by means of wide-angle X-raydiffraction (WAXD)

dynamic mechanical analysis (DMA) and mechanical property tests. In the orientation stage

the PGA fibers were found to have higher degrees of crystallinity than corresponding PGA-co-PLA samples produced under similar conditions. In the hot-stretching and post-annealing stages

after fibers were braided

PGA samples were found to gain more crystallinity and higher Tg than PGA-co-PLA samples.The higher crystallinity in PGA fibers resulted in a slower rate of degradation.DMA results showed that a great deal of internal stress that was built during orientation and hot-stretching stages was released in the post-annealing stage for all PGA and PGA-co-PLA samples.During earlier stages of in vitro degradation

both PGA and PGA-co-PLA samples exhibited the typical cleavage-induced crystallization mechanism.The heat shrinkage in the glass transition area was found to disappear after 6-8 days of degradation for all PGA and PGA-co-PLA samples

indicating the amorphous portions of the polymers lost orientation after a short period in the buffer solution

most likely due to relaxation of the cleaved chains.

Abstract

dynamic mechanical analysis (DMA) and mechanical property tests. In the orientation stage

the PGA fibers were found to have higher degrees of crystallinity than corresponding PGA-co-PLA samples produced under similar conditions. In the hot-stretching and post-annealing stages

after fibers were braided

indicating the amorphous portions of the polymers lost orientation after a short period in the buffer solution

most likely due to relaxation of the cleaved chains.

关键词

Keywords

references

Views

Downloads

CSCD

Alert me when the article has been cited

Submit

Tools

Publicity Resources

Sliding Dynamics of Ring Chain on a Rod-Coil Block Copolymer in Rotaxane

Multiple-Responsive Chiral Hydrogels from Helical Dendronized Poly(phenylacetylene)s

Optically Active Helical Poly(phenyl isocyanide)s Bearing Achiral Benzanilide Pendants: from Controlled Synthesis to Enantioseparation Application

One-handed Helical Poly(m-terphenyl acetylene)s with Broad Optical Activity Range from Ultraviolet-Visible to Near-infrared Regions

Circularly Polarized Luminescence Based on Helical Polymers: Structure-Property Relationships and Regulation Mechanisms

Related Author

No data

Related Institution

No data

⁰