FT-Raman investigation of biodegradable polymers: Poly(3-hydroxybutyrate) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
FT-Raman investigation of biodegradable polymers: Poly(3-hydroxybutyrate) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
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DOI：
10.1016/j.vibspec.2010.07.011
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发表时间：
2010-11-18
影响因子：
2.5
通讯作者：
Temperini, Marcia L. A.
中科院分区：
文献类型：
--
作者：
Izumi, Celly M. S.;Temperini, Marcia L. A.
本文介绍了天然聚酯聚[（R）-3-羟基丁酸酯]（PHB）及其共聚物聚[（R）-3-羟基丁酸酯-co-（R）-3-羟基戊酸酯]（PHBV）与5、8和12 mol %HV（羟基戊酸酯）的FT-拉曼光谱（λ（0）= 1064 nm）研究。薄膜的FT-Raman光谱表明，以1725 cm（-1）为中心的谱带半高全宽和1443和1458 cm（-1）谱带的相对强度可以用来估计薄膜样品的结晶程度。熔融态聚合物的拉曼光谱与溶液中聚合物的相似性表明，熔融态聚合物的构象与溶液中聚合物的构象相似。这些样品的拉曼数据显示，1220、1402、1725、2998和3009 cm（-1）处的谱带是由于晶体螺旋结构造成的，而1453、1740、2881、2938和2990 cm（-1）处的谱带则源自无序结构域。结果表明，通过分析溶液光谱中2938 cm（-1）（nuC = O）和1740 cm（-1）（nuC =O）谱带的强度比值，以及熔融聚合物光谱中1354（wCH（2））和1740 cm（-1）（nuC = O）谱带的强度比值，可以估算PHBV样品的组成。(C)2010爱思唯尔有限公司版权所有。
This work presents a FT-Raman study (lambda(0) = 1064 nm) of naturally occurring polyester poly[(R)-3-hydroxybutyrate] (PHB) and its copolymer poly[(R)-3-hydroxybutyrate-co-(R)-3-hydroxyvalerate] (PHBV) with 5,8 and 12 mol % of HV (hydroxyvalerate). The FT-Raman spectra of films indicate that full width at half height of the band centered at 1725 cm(-1) and relative intensity of bands at 1443 and 1458 cm(-1) can be use to estimate the crystalline degree in film samples. The similarity between Raman spectra of molten PHB and PHBV and theirs CDCl3 solutions suggested that molten polymers present similar conformation than polymers in solution. Raman data of these samples showed that bands at 1220, 1402, 1725, 2998 and 3009 cm(-1) are due to crystalline helical structure and the bands at 1453, 1740, 2881, 2938 and 2990 cm(-1) are originated from disordered domains. It is shown that composition of PHBV samples can be estimated by analyzing the ratio of the intensity of the bands at 2938 cm(-1) (nu C-H) and 1740 cm(-1) (nu C=O) in the spectra of solutions and of bands at 1354 (wCH(2)) and 1740 cm(-1) (nu C=O) in spectra of molten polymers. (C) 2010 Elsevier B.V. All rights reserved.