Bioplastics were prepared from the fatty fraction (i.e., unsaturated and polyhydroxylated fatty acids) of tomato pomace agro-wastes. Aliphatic polyesters were synthesized at different temperatures (125, 150, and 175 °C), reaction times (0.25, 0.5, 0.75, 1, 3, 5, and 7 h), and amounts of tin (II) 2-ethylhexanoate (0, 0.02, 0.05, and 0.10 mmol) used as a catalyst. The rate constants and activation energies were calculated from infrared spectra. The right combination of reaction temperature and amount of catalyst improved the reaction kinetics (apparent k from ∼1 to ∼8.5 h⁻¹), whereas the activation energy was reduced from ∼39 without catalyst to ∼28 kJ/mol when tin (II) 2-ethylhexanoate was present. Glass transitions between ca. −25 and ∼0 °C were measured by differential scanning calorimetry, strictly depending on the degree of polymerization. The amorphous character of the samples was confirmed by X-ray diffraction. Young's modulus and hardness were calculated from indentation tests and were typical of soft materials, although increased as the polycondensation reaction progressed. High water-contact angles (maximum value ∼109°) and low water uptakes (minimum value ∼2.1%) were determined. Physical properties were compared with those of common man-made plastics and polymers, finding that these tomato pomace bioplastics could be their realistic alternatives.

由番茄果渣农业废料的脂肪部分（即不饱和脂肪酸和多羟基化脂肪酸）制备生物塑料。在不同温度（125、150和175°C），反应时间（0.25、0.5、0.75、1、3、5和7小时）以及2-乙基己酸锡（II）的量（0 （0.02、0.05和0.10 mmol）用作催化剂。由红外光谱计算出速率常数和活化能。正确组合反应温度和催化剂量可改善反应动力学（表观k从约1到〜8.5 h ^-1），而当锡（II）存在时，活化能从无催化剂时的约39降低到约28 kJ / mol。存在2-乙基己酸酯。玻璃之间的过渡。 严格取决于聚合度，通过差示扫描量热法测量-25和〜0°C。通过X射线衍射确认了样品的非晶性。杨氏模量和硬度是通过压痕试验计算得到的，并且是软材料的典型值，尽管随着缩聚反应的进行而增加。确定了高水接触角（最大值〜109°）和低吸水率（最小值〜2.1％）。将其物理性能与普通的人造塑料和聚合物进行了比较，发现这些番茄果渣生物塑料可能是其现实的替代品。