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EduChemia (Jurnal Kimia dan Pendidikan)
Published by Universitas Sultan Ageng Tirtayasa
ISSN : 25024778     EISSN : 25024787     DOI : http://dx.doi.org/10.30870/educhemia.v6i2.10412
Core Subject : Science, Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology
Focus and Scope Educhemia (Jurnal Kimia dan Pendidikan) is Periodicals published the results of research related to the development of science and technology in the field of Chemistry and Chemistry education as a form of intellectual property Chemistry: Organic chemistry, Inorganic chemistry, Biochemistry, Physical chemistry, Analytical Chemistry, Environmental Chemistry, Material chemistry, Ethnochemistry. Chemistry education: chemistry learning design and model, chemical education curricula, Technology innovation and media/multimedia in chemistry learning, development of evaluation tools, lesson study and classroom action research
Arjuna Subject : Kimia(semua kategori) - Kimia Organik
Articles 2 Documents
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Search results for , issue "Vol 8, No 2 (2023)" : 2 Documents clear
Correlation Analysis of Radical Polymerization Reactor Operating Conditions to Industrial Scale Swelling Capacity of Superabsorbent Willy Aulia Ilham; Teguh Kurniawan; Saepurahman Saepurahman; Ratna Sari Siti Aisyah
EduChemia (Jurnal Kimia dan Pendidikan) Vol 8, No 2 (2023)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v8i1.21201

Abstract

Superabsorbent polymer (SAP) is a polymer that has many functions in modern human’s life, one of which is as an absorbent material in baby diapers. The growing demand for SAP with high quality SAP makes it necessary to study the effects of production variables on the quality of SAP on an industrial scale. The quality of SAP is determined by the number of Swelling Capacity (SC) where the ideal number is greater than 50 g/g. Many previous studies regarding the effect of synthesis parameters on the number of SC of SAP were limited to the laboratory scale where the polymerization conditions were different from the industrial scale. Also the number of variables and SC data obtained from laboratory scale synthesis were limited. The polymerization stage in the reactor with its accompanying operating variables such as reaction temperature, monomer concentration, retention time, crosslinker concentration, addition of nitrogen gas and initiator concentration affects the value of SC in the industrial-scale SAP production process. This study aims to analyse the correlation between the reactor operating conditions and the number of SAP SC obtained. Correlation data analysis was done using microsoft excel with Data Analysis toolpak/ python by utilizing production data with a total of 1,562 entries where the correlation between each variables was calculated using the Pearson’s correlation coefficient. Based on the analysis, it was obtained that the variables that had the strongest correlation with the SC were retention time and reaction temperature with correlation coefficient values of 0.31 and -0.26. The weakest correlation was obtained from the addition of nitrogen gas and an initiator with a value of -0.07 and -0.02. Positive values indicate a relationship that is directly proportional while negative values indicate an inverse relationship. Based on the correlation analyses and trends, the ideal polymerization conditions have been identified.
Scientific Critical Thinking Model to Improve Scientific Literacy and Self-Regulation Skills in Buffer Solution Learning Rusmansyah Rusmansyah; Akhmad Maulana Effendi; Mahdian Mahdian; Mohamad Nor Aufa
EduChemia (Jurnal Kimia dan Pendidikan) Vol 8, No 2 (2023)
Publisher : Department of Chemical Education Faculty of Teacher Training and Education Universitas Su

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30870/educhemia.v8i2.15988

Abstract

The low inputs, processes, and learning outputs require competency assessments in science, one of which is scientific literacy and self-regulation. This study aims to determine the differences in scientific literacy and self-regulation of students in buffer solution materials. This study is quasi-experimental using a non-equivalent control group design. The study population consisted of 205 students from the XI MIPA SMAN 7 Banjarmasin class, and sampling used purposive sampling techniques with a sample of 69 students. Data collection was carried out using test instruments in the form of multiple-choice Three Tier Tests and non-tests in the form of self-regulation questionnaires. The collected data were analyzed using Multivariate Variance Analysis (MANOVA) with the help of SPSS 27.0 software. The results of hypothesis testing show a significance of <0.05, meaning that there is a significant influence of critical thinking models on these two variables. So, it can be concluded that there is an influence of scientific critical thinking models on scientific literacy abilities and students' self-regulation.

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