PMID- 30966545
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20200930
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 10
IP  - 5
DP  - 2018 May 9
TI  - Evaluation of the Stability of Polymeric Materials Exposed to Palm Biodiesel and 
      Biodiesel(-)Organic Acid Blends.
LID - 10.3390/polym10050511 [doi]
LID - 511
AB  - The aim of the present work is to evaluate the impact of pure palm biodiesel fuel 
      (B100) and biodiesel blends with 0.32% oleic, palmitic, acetic, myristic, and 
      stearic acids on the properties of some polymeric materials used commonly in the 
      manufacture of auto parts such as the polyamide 66 (PA66), polyoxymethylene 
      (POM), and high-density polyethylene (HDPE). The effects of the B100 and 
      B100(-)acid blends on polymeric materials were examined by comparing changes in the 
      gain/loss of mass and by measuring the hardness, the impact strength, and the 
      tensile strength of the materials at the end of the exposure. The 
      characterization of the polymers was carried out before and after exposure by 
      using differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), 
      and Fourier transform infrared spectroscopy (FTIR). After the immersion in 
      B100(-)acids blends, the HDPE exhibited an increase in mass of 5%, which was very 
      similar in all blends. The PA66 showed a small decrease in weight (2% approx.) in 
      all mixtures. The POM presented an increase in the percentage of weight in the 
      mixture of B100 with acetic acid of 0.3%. A decrease was observed in the 
      crystallinity of the HDPE when exposed to blends of B100(-)acids. This behavior may 
      be associated with a plasticizing effect in the HDPE exposed to the blends. The 
      mechanical properties of POM and HDPE showed no significant changes after 
      immersion in the fuels. On the other hand, PA66 exhibited a significant decrease 
      in maximum stress value after immersion in B100, B100(-)oleic acid and 
      B100(-)palmitic acid blends. The variation of the mechanical properties of the PA66 
      after exposure to B100 was potentiated by addition of organic acids. The assessed 
      polymers did not undergo appreciable changes in the chemical structure of the 
      samples after immersion in the fuels, so the variation in the mechanical 
      properties could be explained by physical absorption of the fuel into the 
      polymers.
FAU - Baena, Libia M
AU  - Baena LM
AD  - Grupo de Calidad, Metrologia y Produccion, Instituto Tecnologico Metropolitano 
      ITM, Medellin 050034, Colombia. libiabaena@itm.edu.co.
FAU - Zuleta, Ernesto C
AU  - Zuleta EC
AUID- ORCID: 0000-0003-0232-7528
AD  - Grupo de Procesos Fisicoquimicos Aplicados-PFA, Universidad de Antioquia, 
      Medellin 050034, Colombia. eczuletas@gmail.com.
FAU - Calderon, Jorge A
AU  - Calderon JA
AUID- ORCID: 0000-0002-5980-4770
AD  - Centro de Investigacion, Innovacion y Desarrollo de Materiales-CIDEMAT, 
      Universidad de Antioquia, Medellin 050034, Colombia. andres.calderon@udea.edu.co.
LA  - eng
PT  - Journal Article
DEP - 20180509
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC6415428
OTO - NOTNLM
OT  - biodiesel
OT  - degradation
OT  - fatty acids
OT  - mechanic properties
OT  - polymeric materials
COIS- The authors declare no conflict of interest.
EDAT- 2019/04/11 06:00
MHDA- 2019/04/11 06:01
PMCR- 2018/05/09
CRDT- 2019/04/11 06:00
PHST- 2018/03/21 00:00 [received]
PHST- 2018/04/23 00:00 [revised]
PHST- 2018/04/24 00:00 [accepted]
PHST- 2019/04/11 06:00 [entrez]
PHST- 2019/04/11 06:00 [pubmed]
PHST- 2019/04/11 06:01 [medline]
PHST- 2018/05/09 00:00 [pmc-release]
AID - polym10050511 [pii]
AID - polymers-10-00511 [pii]
AID - 10.3390/polym10050511 [doi]
PST - epublish
SO  - Polymers (Basel). 2018 May 9;10(5):511. doi: 10.3390/polym10050511.