Determination of the Biobased Content in Plastics by Radiocarbon

Radiocarbon ◽  
2013 ◽  
Vol 55 (3) ◽  
pp. 1834-1844 ◽  
Author(s):  
Gianluca Quarta ◽  
Lucio Calcagnile ◽  
Massimo Giffoni ◽  
Eugenia Braione ◽  
Marisa D'Elia
Keyword(s):  
Raw Materials ◽  
Unsaturated Polyester ◽  
Isotopic Fractionation ◽  
Volatile Components ◽  
Polyester Resins ◽  
Solid Form ◽  
Biobased Content ◽  
Calculation Procedures ◽  
Open Issues

Accelerator mass spectrometry (AMS) radiocarbon analyses were performed on biobased unsaturated polyester resins in order to assess the potential of the method for the determination of the bio-fraction. Different resins were synthesized in the laboratory with different proportions of raw materials of biogenic origin, and analyzed both in the liquid and in the solid form. As a preliminary step of the study, both the biobased and the fossil-derived raw materials were analyzed in order to determine their 14C content. A comparison of the obtained results with the expected ones allowed us to investigate the potential of the 14C method in this field as well as to address some still open issues such as the levels of uncertainty and accuracy as related to the calculation procedures, the correction for isotopic fractionation, and the effect of the presence of volatile components in the analyzed materials.

scholarly journals Microvickers hardness determination of unsaturated polyester resins reinforced with alumina based reinforcement

Tehnika ◽  
2018 ◽  
Vol 73 (5) ◽  
pp. 621-625
Author(s):  
Abdusalam Drah ◽  
Nataša Tomić ◽  
Marija Vuksanović ◽  
Veljko Đokić ◽  
Dunja Daničić ◽  
...  
Keyword(s):  
Unsaturated Polyester ◽  
Polyester Resins ◽  
Unsaturated Polyester Resins

scholarly journals Effect of Silica Composition from Rice Husk Ash on The Performace of Absorbing Electromagnetic Wave on Composite of Unsaturated Polyester Resins/Silica

2018 ◽  
Vol 19 (1) ◽  
pp. 7
Author(s):  
Rizky Fauzy ◽  
Wisnu Ari Adi ◽  
Yana Taryana ◽  
Y. Yusmaniar
Keyword(s):  
Electromagnetic Wave ◽  
Rice Husk ◽  
Electromagnetic Waves ◽  
Rice Husk Ash ◽  
Raw Materials ◽  
Unsaturated Polyester ◽  
Silica Content ◽  
X Ray Diffraction ◽  
Polyester Resins ◽  
Unsaturated Polyester Resins

This study aim is to know the effect of silica composition on the absorption of electromagnetic waves in the composite of unsaturated polyester resins (UPR)/silica. Silica raw materials have been synthesized from the results of rice husk ash extraction. The results of the analysis phase and elementary respective using X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) show that the extraction of silica has an amorphous phase with a high purity. This silica powders are filler material acts as an electromagnetic waves absorber material and combined with the UPR as a matrix to form a composite. Silica powder varied with several compositions in this composite. The observation of scanning electron microscope (SEM) shows that the silica particles have been distributed evenly in the UPR matrix. Meanwhile the results of testing the absorption of electromagnetic waves at frequency range of 8 GHz - 12 GHz using a vector network analyzer (VNA) show that the addition of silica composition have significant effect on the absorption of electromagnetic waves. The more the silica content in the UPR matrix causes the absorption of electromagnetic waves more increasing. It was concluded that the presence of silica can improve the absorption performance of electromagnetic waves in composite UPR/silica. Keywords: rice husk ash, silica, UPR, composites, electromagnetic wave absorber

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