This study aimed to apply a novel green polymerization process to produce a new copolymer with potential antimicrobial activity for industrial application. The glycidol was polymerized into hyperbranched polyglycidol (HPG) polymer which in turn has been esterified with rosin to produce hyperbranched copoly(glycidol-Rosin) (HPGR), a new co-polymer. The process used Maghnite-H+, a montmorillonite silicate sheet clay, as an eco-catalyst and ultrasound was applied to enhance the interaction during polymerization. Different catalyst amounts were tested to assess their effects on the polymerization process. Fourier Transform Infrared Spectroscopy (FT-IR), Differential Scanning Calorimetry (DSC) and Thermogravimetric Analysis (TGA) were used to analyze the polymer products. The antimicrobial activity of HPGR was assessed against six human standard microbial strains using the agar disc diffusion method. The catalyst percentage of 10% resulted in the best yield for HPGR (35%). Thermogravimetric Analysis (TGA) revealed a best thermal stability of HPGR compared to that of HPG. The HPGR co-polymer displayed the best antibacterial activity against Klebsiella pneumonia, Bacillus cereus, Staphylococcus aureus, and Escherichia coli, producing inhibition zones of 12.33 ± 0.57, 11.00 ± 1.00, 10.66 ± 1.15, and 10.33 ± 1.15 mm, respectively. The hyperbranched copoly(glycidol-Rosin), an eco-catalyst-synthesized co-polymer, displayed interesting physical and antimicrobial properties for industrial application.

中文翻译：

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超声波下天然催化剂接枝松香的超支化聚缩水甘油：合成、表征和抗菌活性

本研究旨在应用新型绿色聚合工艺来生产具有工业应用潜在抗菌活性的新型共聚物。缩水甘油聚合成超支化聚缩水甘油（HPG）聚合物，该聚合物又与松香酯化，生成超支化共聚（缩水甘油-松香）（HPGR），一种新型共聚物。该工艺使用 Maghnite-H+（一种蒙脱石硅酸盐片状粘土）作为生态催化剂，并应用超声波来增强聚合过程中的相互作用。测试了不同的催化剂用量以评估它们对聚合过程的影响。使用傅里叶变换红外光谱（FT-IR）、差示扫描量热法（DSC）和热重分析（TGA）来分析聚合物产品。使用琼脂盘扩散法针对六种人类标准微生物菌株评估了 HPGR 的抗菌活性。10% 的催化剂百分比导致 HPGR 的最佳产率 (35%)。热重分析 (TGA) 显示，与 HPG 相比，HPGR 具有最佳的热稳定性。HPGR共聚物对肺炎克雷伯氏菌、蜡样芽孢杆菌、金黄色葡萄球菌和大肠杆菌表现出最佳的抗菌活性，产生的抑菌圈分别为12.33±0.57、11.00±1.00、10.66±1.15和10.33±1.15毫米。超支化共聚物（缩水甘油-松香）是一种生态催化剂合成的共聚物，在工业应用中表现出有趣的物理和抗菌性能。