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dc.contributor.authorChaochanchaikul, Kantimaen_US
dc.contributor.authorกัลทิมา เชาว์ชาญชัยกุลen_US
dc.contributor.authorHarnnarongchai, Wanlopen_US
dc.contributor.authorวัลลภ หาญณรงค์ชัยen_US
dc.date.accessioned2018-02-20T10:55:14Z
dc.date.available2018-02-20T10:55:14Z
dc.date.issued2017-07-08
dc.identifier.urihttp://repository.rmutp.ac.th/handle/123456789/2318
dc.descriptionรายงานวิจัย -- มหาวิทยาลัยเทคโนโลยีราชมงคลพระนคร, 2559en_US
dc.description.abstractThis research work was to study the improvement of toughness and impact resistance of polylactic acid (PLA) with modified soybean oil (MSBO) and palm fiber (PF). The detail of this work was divided into three parts. The first was to find the suitable condition for modification of soybean oil with ozonolysis. The second and last parts were to study the effects of MSBO and PF contents on the properties of PLA, respectively. For oil modification, the reaction times were varied from 0 to 3 hours and the chemical changes in molecules of soybean oil were investigated by Nuclear magnetic resonance (NMR) and Fourier transform infrared (FTIR) spectroscopies. The result suggested that the most suitable condition for ozonolysis reaction was 2 hours considering the decrease in double bond between carbon atoms and the increase in hydroxyl group into molecular structure of MSBO. For the effect of MSBO content on mechanical properties, it was evaluated by tensile and impact testing. Differential scanning calorimeter (DSC) and scanning electron microscope (SEM) were used for thermal and morphology analyses. The result showed that elongation at break and impact strength of modified PLA by MSBO increased about 89 and 25 % compared to those of neat PLA, respectively. MSBO act as the efficient plasticizer for PLA considering the conversion of fracture behavior from brittle to ductile, good dispersions of MSBO droplets in PLA and the decrease of glass transition temperature (Tg) with addition of MSBO. The addition of PF improved the impact strength of modified PLA. Strong interfacial bonding between PLA and PF indicated MSBO being both coupling agent for PLA and natural fiber and plasticizer for PLA. For migration test, it was found that contents of released heavy metal and migrated chemical from specimens of PLA and PLA/PF composite were under the criteria according to Notification of the Ministry of Public Health (No. 295) B.E. 2548.en_US
dc.description.sponsorshipRajamangala University of Technology Phra Nakhonen_US
dc.language.isothen_US
dc.subjectPolylactic aciden_US
dc.subjectSoybean oilen_US
dc.subjectNatural fiberen_US
dc.subjectMechanical propertiesen_US
dc.subjectPlasticizeren_US
dc.subjectBioplasticsen_US
dc.titleImprovement of Toughness and Impact Resistance of Polylactic acid by Using Modified Soybean Oil and Natural Fibersen_US
dc.title.alternativeการปรับปรุงความเหนียวและความทนแรงกระแทกของพอลิแลกติกแอซิดโดยการใช้น้ำมันถั่วเหลืองที่ผ่านการดัดแปรและเส้นใยธรรมชาติen_US
dc.typeResearch Reporten_US
dc.contributor.emailauthorkantima.cha@hotmail.comen_US


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