Epoxidized cardanol-based prepolymer as promising biobased compatibilizing agent for PLA/PBAT blends
Epoxidized cardanol-based prepolymer as promising biobased compatibilizing agent for PLA/PBAT blends
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DOI：
10.1016/j.polymertesting.2020.106889
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发表时间：
2021-01-01
期刊：
影响因子：
5.1
通讯作者：
Soares, Bluma G.
中科院分区：
文献类型：
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作者：
Farias da Silva, Juliana M.;Soares, Bluma G.
以腰果壳液（CNSL）为原料制备的环氧腰果酚预聚物（ECP）作为生物相容剂/扩链剂，成功地用于聚乳酸（PLA）/聚己二酸丁二醇酯-共对苯二甲酸丁二醇酯（PBAT）（80：20wt%）共混体系。将不同量的该生物基添加剂的反应性增容效果与石油衍生的基于缩水甘油基的共聚物，即Joncryl ADR 4300（ADR）的反应性增容效果在机械、动态机械和热性能以及流变学和形态学方面进行比较。加入3wt%的ECP导致屈服应力，断裂伸长率，杨氏模量和韧性显着改善。用该添加剂获得的结果与ADR所观察到的结果相似或甚至上级。与非常小的PBAT域的海岛型形态也达到了与增容，如通过扫描电子显微镜（SEM）所示。PBAT相的玻璃化转变温度略有升高，PLA相的结晶度有所降低，这也表明了增容作用。这项工作中提出的结果为开发用于食品包装应用的具有成本效益的生物基和/或可生物降解材料开辟了新的可能性。
Epoxidized cardanol-based prepolymer (ECP) generated from cashew nut shell liquid (CNSL) was successfully used as biobased compatibilizer/chain extender for poly (lactic acid) (PLA)/poly (butylene adipate-coterephthalate) (PBAT) (80:20 wt%) blends. The reactive compatibilization effectiveness of different amounts of this biobased additive was compared with that of a petroleum-derived glycidyl-based copolymer, namely Joncryl ADR4300 (ADR) in term of mechanical, dynamic-mechanical and thermal properties, as well as rheological and morphological aspects. The addition of 3 wt% of ECP resulted in significant improvement of yield stress, elongation at break, Young modulus and toughness. The results obtained with this additive were similar or even superior to those observed for ADR. A sea-island-type morphology with very small PBAT domains was also reached with the compatibilization, as indicated by scanning electron microscopy (SEM). The compatibilization was also suggested from the slight increase of the glass transition temperature of the PBAT phase and also a decrease in crystallinity degree of PLA phase. The results presented in this work open new possibilities for developing cost-effective biobased and/or biodegradable materials for food packaging applications.