Green Polyethylene in Harsh Environments: Gamma-irradiation Effects

被引：0
|
作者：
de Medeiros, Pablo R. [1 ]
Araujo, Patricia L. B. [1 ,2 ]
Aquino, Katia A. S. [1 ,3 ]
Araujo, Elmo S. [1 ]
机构：
[1] Univ Fed Pernambuco UFPE, Dept Eneigia Nucl, Av Prof Luiz Freire 1000,Cidade Univ, BR-50740545 Recife, PE, Brazil
[2] Univ Fed Pernambuco UFPE, Dept Engn Biomed, Av Jornalista Anibal Fernandes S-N,Area 2, BR-50740560 Recife, PE, Brazil
[3] Colegio Aplicacdo UFPE, Av Arquitetura S-N,Cidade Univ, BR-50740550 Recife, PE, Brazil
来源：
MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS | 2022年 / 25卷
关键词：
bio-basedplastics; gamma radiation; LLDPE thermal properties; LLDPE mechanical properties; nuclear power plants; THERMAL-DECOMPOSITION; ACTIVATION-ENERGY; SUPPLY CHAIN; KINETIC-ANALYSIS; DEGRADATION; INNOVATION; RADIATION; THERMOGRAVIMETRY; SUSTAINABILITY;
D O I：
10.1590/1980-5373-MR-2022-0186
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Bio-based linear low-density polyethylene (green LLDPE) composites are used as electrical jackets/insulator for cables. Assessments of gamma-irradiation (Co-60) effects on these materials are of interest as they might be used in nuclear power plants (NPPs). Brazilian sugarcane juice-based green LLDPE composite electrical jackets were irradiated until 1000 kGy and analyzed for thermal stability and mechanical characteristics. Thermogravimetry analysis (TGA) showed increasing of pyrolysis activation energy (E-alpha) (under N-2) from 42.7 +/- 4.2 kJ/mol in unirradiated samples to 72.8 +/- 4.6 kJ/mol after 60 kGy dose, as resulted of radiation-induced effects. FTIR spectra evidenced radiation-induced formation of conjugated C=C bonds after 250 kGy dose. Tensile stress and Young modulus did not change significantly until 150 kGy dose, whereas elongation at break decreased and reached 50% at 91 kGy dose. These results suggest that green LLDPE might withstand radiation damage through a NPP operating life (similar to 40 years).
引用
收藏
页数：8
相关论文
共 50 条
12345