The l-alanine, glycine and 4-aminobutyric acid, respectively representing the natural chiral amino acids, the natural achiral amino acids and non-natural achiral amino acids, were combined into three types of diacid monomers containing the imide groups. The resulting diacid monomers and the diaminodiphenyl ether were combined into the glycine-based homopolymerized polyamide-imide (PAI) via the direct polycondensation method, as well as four randomly copolymerized PAI’s. The biodegradability of these polymers has been studied in a systemic manner with the soil burial experiments and the appearance, molecular weights and structure of the polymers before and after the degradation have been characterized with the scanning electron microscopy, gel permeation chromatography and Fourier transform infrared spectroscopy. The research outcomes suggested that the glycine-based PAI has certain biodegradability. For the copolymerized PAI combined with the glycine and l-alanine fragments, the higher the l-alanine fragment content is, the faster the biodegradation rate becomes. However, for the copolymerized PAI based on glycine and 4-aminobutyric acid, the higher the 4-aminobutyric acid structural units, the slower the biodegradation rate becomes. It can be concluded that the copolymerization with l-alaine enhanced the biodegradation instead of using glycine or 4-aminobutyric acid.
Polymer Degradation and Stability – Elsevier
Published: Jul 1, 2016
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.
All for just $49/month
Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.
Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.
It’s easy to organize your research with our built-in tools.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera