*2.1. Materials*

The corn starch (particle size: 14.89 µm) was provided by Thye Huat Chan Sdn Bhd (Penang, Malaysia). Rice husk waste (particle size: 16.59 µm) was obtained from Fragstar Corporation Sdn. Bhd. (Kedah, Malaysia). The polymer poly (butylene adipate coterephthalate) (PBAT) with T<sup>m</sup> = 115–125 ◦C and MRF (190 ◦C/2.16 kg): 3.0–5.0 g/10 min) was purchased from ZhuHai WanGo Chemical Co., Ltd. (Zhuhai, China) under the commercial name of A400. Polybutylene succinate (PBS; Tm: 120 ◦C; MRF: 10–15 g/10 min) (injection molding grade) was obtained from Hefei TNJ Chemical Industry Co., Ltd. (Hefei, China). Glycerol was obtained from Aldrich Chemical Company (St. Louis, MO, USA) with a purity of 85%. Calcium stearate was purchased from Strem Chemical Company (Massachusetts, United States). The reactive modification of PBAT/PBS was performed using maleic anhydride (98% pure), which was purchased from Fluka (Jawa Timur, Indonesia). Dicumyl peroxide with a purity of 99% obtained from Sigma-Aldrich (St. Louis, MO, USA), was used as an initiator.
