Effect of chain extender on structural and mechanical properties of poly(butylene succinate-co-adipate)/halloysite nanotube bionanocomposites

SPE Polymers

article

Kalappa Prashantha¹  Baralu J. Rashmi² 

[1] ACU-Centre for Research and Innovation, Faculty of Natural Sciences, Adichunchanagiri University;Department of Chemistry, Faculty of Mathematical and Physical Sciences, M.S. Ramaiah University of Applied Sciences

关键词: chain;    extender;    halloysite nanotubes;    morphology;    nanocomposites;    poly(butylene succinate-coadipate);   

DOI  :  10.1002/pls2.10022

学科分类：社会科学、人文和艺术（综合）

来源: Wiley

【 摘 要 】

Background : Stunting is a very short body state in children that goes beyond the 2 SD deficit below the child population height. Worldwide stunting affects about 162 million children under five. Indonesia is included in 17 countries that have three nutritional problems in children under five: stunting, wasting, and overweight. This study aimed to investigate the determinants of stunting and child development in children under five. Subje cts and Method: This was a retrospective cohort study conducted at Mayangan and Jarak Kulon Community Health Centers, Jombang, East Java, in Januari 2018. A total sample of 58 children were selected for this study by fixed exposure sampling. The dependent variables were stunting and child development. The independent variables were birth-length, maternal age, maternal height, maternal education, and family income. The data were collected by questionnaire. Data on birth length was taken from maternal and child record at community health center. The data were analyzed by path analysis model. Results : The likelihood of good child development increased with maternal education (b= 1.08; 95% CI= 0.41 to 1.75; p= 0.001) and decreased with stunting (b= -0.78; 95% CI= -1.46 to -0.10; p=0.025). The risk of stunting decreased with birth-length (b= -0.90; 95% CI= -1.60 to -0.21; p=0.011) and maternal height (b=-0.92; 95% CI= -1.69 to -0.16; p=0.018). The risk of stunting increased with maternal age <20 y.0. or ≥35 y.o. at pregnancy (b= 0.73; 95% CI= -0.03 to 1.46; p=0.051). The likelihood of maternal age <20 y.0. or ≥35 y.o. at pregnancy decreased with higher education (b=-0.75; 95% CI= -1.44 to -0.06; p=0.033). Birth-length  increased with maternal height (b= 1.07; 95% CI= 0.28 to 1.86; p= 0.008) and higher family income (b=0.93; 95% CI = 0.29 to 1.57; p=0.004). Birth-length decreased with maternal age <20 y.0. or ≥35 y.o. at pregnancy (b=-0.74; 95% CI= -1.48 to -0.01; p=0.047). Conclusion : The likelihood of good child development increases with maternal education and decreases with stunting. The risk of stunting decreases with birth-length and maternal height, and increases with maternal age <20 y.0. or ≥35 y.o. at pregnancy.

【 授权许可】

CC BY