Effect of citric acid on thermal, phase morphological, and mechanical properties of poly(l-lactide)-b-poly(ethylene glycol)-b-poly(l-lactide)/thermoplastic starch blends

被引：2
作者：
Srisuwan, Yaowalak [1 ,2 ]
Srihanam, Prasong [1 ,2 ]
Phromsopha, Theeraphol [1 ,2 ]
Baimark, Yodthong [1 ,2 ]
机构：
[1] Mahasarakham Univ, Dept Chem, Fac Sci, Biodegradable Polymers Res Unit, Maha Sarakham 44150, Thailand
[2] Mahasarakham Univ, Fac Sci, Ctr Excellence Innovat Chem, Maha Sarakham 44150, Thailand
来源：
E-POLYMERS | 2023年 / 23卷 / 01期
关键词：
polylactide; block copolymer; thermoplastic starch; citric acid; phase compatibility; LOW-DENSITY POLYETHYLENE; POLYLACTIC ACID; DEGRADATION; PLA; BIODEGRADATION; IMPROVEMENT; WATER;
D O I：
10.1515/epoly-2023-0057
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
This work investigated the thermal, morphological, and tensile properties of poly(l-lactide)-b-poly(ethylene glycol)-b-poly(l-lactide) (PLLA-PEG-PLLA)/thermoplastic starch (TPS) blends with 3 wt% citric acid (CA) treatment of TPS. The blends with PLLA-PEG-PLLA/CA-TPS ratios of 100/0, 90/10, 80/20, and 60/40 (w/w) were investigated and compared with PLLA-PEG-PLLA/CA-free TPS blends. Crystallizability of the blends decreased and thermal stability increased as the TPS content increased. The thermal stability of the blends was found to improve after CA treatment of TPS. The PLLA-PEG-PLLA/CA-TPS blends showed better phase compatibility than those of the PLLA-PEG-PLLA/CA-free TPS blends. The tensile properties of the blends were improved by CA treatment of TPS. In conclusion, improvement in thermal stability, phase compatibility, and tensile properties of the PLLA-PEG-PLLA/TPS blends was obtained by CA treatment of TPS. The resulting PLLA-PEG-PLLA/CA-TPS blends could potentially be used to prepare biodegradable and flexible bioplastics.
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页数：9
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