Department of Chemistry, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang (KMITL), Bangkok 10520, Thailand.
Department of Chemistry, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang (KMITL), Bangkok 10520, Thailand; Advanced Materials Research Unit, Faculty of Science, King Mongkut's Institute of Technology Ladkrabang (KMITL), Bangkok 10520, Thailand.
Int J Biol Macromol. 2019 Feb 15;123:657-663. doi: 10.1016/j.ijbiomac.2018.11.083. Epub 2018 Nov 13.
Due to poor mechanical and thermal properties of native starch (NS) film; in the present work; NS was modified by graft copolymerization. Thermoplastic starch (TPS) grafted by methacrylic acid (MAA) with different percentage of grafting, i.e., 0%, 18.3%, 36.3%, 52.1% and 89.7% were prepared and tested. The result demonstrated that the intensity of IR peak of acrylic group increased with the increasing percentage of grafting. The higher graft copolymerization with MAA also significantly reduced degree of crystallinity. The strain at maximum load of TPS film grafted by MAA increased with the increasing percentage of grafting. However, water uptake of TPS film grafted by MAA reduced with high percentage of grafting (52.1% and 89.7%). In addition, different TPS films grafted by MAA were also examined for morphology, water vapor permeability, thermal property and biodegradable property by soil buried test.
由于天然淀粉（NS）薄膜的机械和热性能较差；在目前的工作中；通过接枝共聚对 NS 进行了改性。用不同接枝率的甲基丙烯酸（MAA）接枝的热塑性淀粉（TPS），接枝率分别为 0%、18.3%、36.3%、52.1%和 89.7%，并进行了测试。结果表明，丙烯酸基团的 IR 峰强度随接枝率的增加而增加。与 MAA 的高接枝共聚也显著降低了结晶度。MAA 接枝 TPS 薄膜的最大负载应变随接枝率的增加而增加。然而，MAA 接枝 TPS 薄膜的吸水率随接枝率的增加（52.1%和 89.7%）而降低。此外，还通过土壤掩埋试验对不同 MAA 接枝的 TPS 薄膜的形貌、水蒸气透过性、热性能和可生物降解性进行了研究。
