Saeed Sanjari, Payam Saraeian, Shahram Etemadi Haghighi, Ali Alinia-ziazi
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引用次数: 0
Abstract
Biodegradable polymers have a high potential in making medical devices such as absorbable esophageal and vascular stents, bone, orthopedic screws and pins, etc. One of the main challenges of using biodegradable polymers as medical devices is the loss of mechanical characteristics due to degradation. Various factors affect the degradation rate of polymers according to the environmental conditions of using these types of devices. Knowing the structural equations governing the degradation rate of polymers and predicting their mechanical performance over time are important issues that lead to the optimal design of polymer devices and their mechanical performance before clinical use and in vivo tests. The degradation behavior of biodegradable polymers can be modeled with three different approaches: “phenomenological methods,” “stochastic/probabilistic methods,” and “physio-chemical methods.” Each approach and sub-branches have used different laws and assumptions to obtain the structural degradation equations. This article reviews the types of techniques used in modeling the degradation behavior of biodegradable polymers, structural equations governing and the degradation of biodegradable polymers using the phenomenological and stochastic/probabilistic approach. The achievements and limitations of each method are discussed and analyzed. Physio-chemical methods will be discussed in another article the author intends to publish.
期刊介绍:
The Journal of Polymers and the Environment fills the need for an international forum in this diverse and rapidly expanding field. The journal serves a crucial role for the publication of information from a wide range of disciplines and is a central outlet for the publication of high-quality peer-reviewed original papers, review articles and short communications. The journal is intentionally interdisciplinary in regard to contributions and covers the following subjects - polymers, environmentally degradable polymers, and degradation pathways: biological, photochemical, oxidative and hydrolytic; new environmental materials: derived by chemical and biosynthetic routes; environmental blends and composites; developments in processing and reactive processing of environmental polymers; characterization of environmental materials: mechanical, physical, thermal, rheological, morphological, and others; recyclable polymers and plastics recycling environmental testing: in-laboratory simulations, outdoor exposures, and standardization of methodologies; environmental fate: end products and intermediates of biodegradation; microbiology and enzymology of polymer biodegradation; solid-waste management and public legislation specific to environmental polymers; and other related topics.