The Properties of Polymer Blends between Poly(lactic) Acid and Epoxidized Natural Rubber Irradiated in the Rubber Phase
The objective of this work was to study the properties of new biodegradable packaging materials byradiation crosslinking in the rubber phase in a poly(lactic)acid (PLA)/epoxidized natural rubber blend. As aresult of increasing problems with regards to disposal of domestic waste, particularly plastics, a new class ofpolymer especially designed to be biodegradable, has been undergoing development. The mechanical propertiesindicated that the 90/10 composition of the PLA/ENR blend had the highest modulus, elongation at break andtensile strength compared to other blend compositions. This research will therefore employ this ratio to investigatethe effect of pre-irradiation of epoxidized natural rubber on the properties of the poly (lactic) acid /epoxidizednatural rubber blend. The impact strength of the polymer blend increases with an increased radiation doseirradiated into the rubber phase because the increase in the radiation dose leads to an increase in the crosslinkdensity within the rubber phase. Moreover, the TGA thermograms of polymer blends without irradiation in theENR phase are compared with pre-irradiation in the ENR phase. It could be concluded that at a particulartemperature weight loss from irradiation in the ENR phase at 30 kGy is higher than from other radiation doses andalso no radiation dose, indicating that no radiation provides more thermal stability. Thus it could be seen thatdegradation being the predominant process during irradiation causes the scission of the rubber chains and thischain scission is associated with the weight loss.
Tarinee Nampitch Rathanawan Magaraphan
Department of Packaging Technology, Faculty of Agro-Industry, Kasetsart University, Bangkok, Thailan The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok, Thailand
国际会议
The 17th IAPRI World Conference on Packaging(第17届世界包装大会)
天津
英文
388-391
2010-10-12（万方平台首次上网日期，不代表论文的发表时间）