Enhancing Thermal Stability of Pony (3-hydroxybutyrate-co-3-hydroxyvallerate) by Introducing 2, 2-bis (2-oxazoline)
(0) Chemical modification of poly (3-hydroxylbutyrate-co- 3-hydroxylvalerate) (PHBV) to improve its thermal stability was carried out by use of 2, 2-bis (2- oxazoline) (BOX) as an non-toxic modifier. The effects of reactive temperature and time on thermal stability of PHBV were investigated. The TGA curves showed that modified PHBVs were decomposed by a one step process similar to original PHBV. With the increase of reactive temperature, thermal stability of PHBV first improved and then declined. The optimal temperature to thermal stability was 95℃. As reactive time increased at 95℃, values of degradation and kinetic parameters first increased and then decreased. However, longer reactive time would result in the increase of values of degradation and kinetic parameters. The best thermal stability of PHBV was observed when reactive time was 4 hour at 95℃. During PHBV modified by BOX, the decrease of acid values and the formation of grafting and cross- linking improved the thermal stability of PHBV.
poly (3-hydroxylbutyrate-co-3-hydroxylvalerate) 2, 2-bis (2-oxazoline) thermal stability biomaterials
LIU Qingsheng ZHU Meifang WU Wenhua QIN Zongyi
State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, College of Material Science and Engineering, Donghua University, Shanghai 201620, P. R. China
国际会议
上海
英文
754-756
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）