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首页> 外文期刊>Journal of Polymers and the Environment >Biodegradable Plasticized Blends of Poly(L-lactide) and Cellulose Acetate Butyrate: From Blend Preparation to Biodegradability in Real Composting Conditions
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Biodegradable Plasticized Blends of Poly(L-lactide) and Cellulose Acetate Butyrate: From Blend Preparation to Biodegradability in Real Composting Conditions

机译：聚（L-丙交酯）和醋酸丁酸纤维素的可生物降解增塑共混物：从共混物制备到实际堆肥条件下的可生物降解性

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Biodegradable blends of poly(L-lactide) (PLL) and cellulose acetate butyrate (CAB) were prepared as 40-60 A mu m thick films cast from solution using chloroform as a solvent. Both poly(ethylene glycol) (PEG) and a polyester adipate (Paraplex G40) were used as plasticizers to decrease the PLL/CAB blends' glass transition temperature and make them more flexible. Ternary PLL/CAB/PEG blends showed only partial compatibility due to phase separation of crystalline PLL-rich and CAB-rich domains. In contrast, when Paraplex G40 was used as the plasticizer, it produced PLL/CAB/Paraplex G40 blends with stable morphology over an extended period of time with much reduced phase separation. The PLL/CAB/plasticizer blend films all degraded in real composting conditions at PLL contents of over 50 wt%. Moreover, the PEG-plasticized ternary blend films showed complete degradability at PLL a parts per thousand yen 70 and CAB a parts per thousand currency sign 30 wt%. These results suggest that the CAB content and plasticizer type can be used to tune polymer blend compatibility and biodegradability. The most promising formulations were found to be PLL/CAB/Paraplex G40 blends with compositions of PLL a parts per thousand yen 70, CAB a parts per thousand currency sign 30 and Paraplex G40 = 20 parts by weight, combining good polymer compatibility and biodegradability with a suitable balance of mechanical properties.
机译：聚（L-丙交酯）（PLL）和醋酸丁酸纤维素（CAB）的可生物降解共混物制备为使用氯仿作为溶剂从溶液浇铸的40-60 Aμm厚的薄膜。聚乙二醇（PEG）和聚酯己二酸酯（Paraplex G40）均被用作增塑剂，以降低PLL / CAB共混物的玻璃化转变温度并使其更具柔韧性。三元PLL / CAB / PEG共混物仅显示部分相容性，这是因为富含PLL的结晶域和富含CAB的域发生相分离。相反，当将Paraplex G40用作增塑剂时，它生产的PLL / CAB / Paraplex G40共混物在延长的时间段内具有稳定的形态，并且相分离度大大降低。 PLL / CAB /增塑剂混合物薄膜在PLL含量超过50 wt％的情况下，在实际堆肥条件下都会降解。此外，PEG-增塑的三元共混物膜在PLL a /千日元份和70 CAB a /千份货币记号的30wt％下显示出完全降解性。这些结果表明，CAB含量和增塑剂类型可用于调节聚合物共混物的相容性和生物降解性。发现最有前途的配方是PLL / CAB / Paraplex G40混合物，其组成为PLL a /千日元份70，CAB a /千货币份30和Paraplex G40 = 20重量份，具有良好的聚合物相容性和生物降解性机械性能的适当平衡。

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