R.M.C. Santana
Departamento de Engenharia de Materiais, Laboratório de Polímeros – LAPOL, Universidade Federal do Rio Grande do Sul-UFRGS, 9500 Bento Gonçalves Avenue, Postal Code 15010, Porto Alegre 91501-970, Brazil
[ 1 ] - Impact of silver ions and silver nanoparticles on the plant growth and soil microorganisms
There is a growing consumer market for products that proclaim to decrease microorganism counts to prevent infections. Most of these products are loaded with silver in its ionic or nanoparticle form. Through use or during production, these particles can find their way into the soil and cause an impact in microbial and plant communities. This study aims to evaluate the impact of silver based part...
[ 2 ] - Comparative study of degradation of PP modified with organic pro-degradant subjected to natural and artificial ageing
In abiotic degradation the action of light radiation is one of the most important parameters, because polymers undergo degradation due to the action of light (natural or artificial). The aim of this study was to investigate the degradation rate for samples of polypropylene (PP) modified with an organic pro-degradant submitted to ageing in a natural environment and to accelerated ageing test. Th...
[ 3 ] - Biodegradation of PP films modified with organic pro-degradant: natural ageing and biodegradation in soil in respirometric test
In this study, PP films were modified with an organic pro-degradant in different concentrations (1, 2 and 3 wt.%), exposed in the first step of degradation to natural ageing for 100 days followed by biodegradation in simulated soil in the respirometric test for 100 days. At the end of the combined degradation process the PP samples were characterized according to their morphological and physica...
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