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首页> 外文期刊>Journal of Applied Polymer Science >Preparation and analysis of poly(l-lactic acid) composites with oligo(d-lactic acid)-grafted cellulose
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Preparation and analysis of poly(l-lactic acid) composites with oligo(d-lactic acid)-grafted cellulose

机译：聚（L-乳酸）复合材料与寡核苷酸（D-乳酸） - 移植纤维素的制备及分析

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alpha-Cellulose extracted from jute fiber was grafted with oligo(d-lactic acid) (ODLA) via a graft polycondensation reaction in the presence of para-toluene sulfonic acid and potassium persulfate in toluene at 130 degrees C for 9 h under 380 mmHg. ODLA was synthesized by the ring-opening polymerization of d-lactides in the presence of stannous octoate (0.03 wt % lactide) and d-lactic acid at 140 degrees C for 10 h. Composites of poly(l-lactic acid) (PLLA) with the ODLA-grafted alpha-cellulose were prepared by the solution-mixing and film-casting methods. The grafting of ODLA onto alpha-cellulose was confirmed by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The analysis of the composites was performed with FTIR spectroscopy, SEM, wide-angle X-ray diffraction, and thermogravimetric analysis. The distribution of the grafted alpha-cellulose in the composites was uniform and showed better compatibility with PLLA through intermolecular hydrogen bonding. Only homocrystalline structures of PLLA were present in the composites, and the thermal stability increased with increasing percentage of grafted alpha-cellulose. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47424.
机译：通过在甲苯磺酸和甲苯的甲苯磺酸和过硫酸钾存在下，用寡聚纤维（D-乳酸）（Odla）萃取从黄麻纤维中提取的α-纤维素在130℃下在380mmHg下甲苯的甲苯磺酸和过硫酸钾。通过在140℃下的辛酸辛酸盐（0.03wt％丙交酯）和D-乳酸存在下的D-丙酸酯的开环聚合来合成Odla。通过溶液混合和薄膜铸造方法制备具有Odla接枝α-纤维素的聚（L-乳酸）（PLLA）的复合材料。通过傅里叶变换红外（FTIR）光谱（FTIR）光谱和扫描电子显微镜（SEM）确认Odla嫁接到α-纤维素上。用FTIR光谱，SEM，广角X射线衍射和热重分析进行复合材料的分析。复合材料中接枝的α-纤维素的分布是均匀的并且通过分子间氢键结合，与PLLA更好地相容。只有PLLA的同种晶体结构存在于复合材料中，并且随着接枝α-纤维素的百分比增加，热稳定性增加。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,47424。

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