Nowadays, researchers in the field of agrochemicals are trying to find effective methods to limit the excessive usage of pesticides and protect the environment. One of the most popular and promising techniques is the immobilization of pesticides using environment-friendly polymers. In the conducted research, it was demonstrated that the family of lactide/glycolide copolymers are unsuitable for this purpose due to very slow degradation in the soil. We examined influence of relatively small content of PEG blocks in newly synthesized poly(l-lactide-co-glycolide)-poly(ethylene glycol)–poly(l-lactide-co-glycolide) (PLGA–PEG–PLGA) on the degradation in soil, in activated sludge and usefulness of this terpolymers as a biodegraded carrier for the controlled release of two commonly used herbicides (Metazachlor and Pendimethalin). Presence of even small amount of PEG block in the terpolymer chain increases slightly the hydrophilicity of the polymeric chain, thereby increasing its susceptibility to hydrolytic and unexpectedly strongly to enzymatic degradation in soil environment. The amorphism of used as a carriers PLGA-PEG-PLGA terpolymers and the lack of the phenomenon of increasing the degree of crystallinity during degradation allow to achieve uniform progress of degradation, and thus is obtained a relatively constantly release of tested herbicides. In this way, it is possible to determine the optimal profile of degradation of polymer in soil and proper rate of diffusion and leaching of active agents which allows the release of herbicides in optimal and effective doses within 3–4 months of its application.

如今，农用化学领域的研究人员正在尝试寻找有效的方法来限制农药的过量使用并保护环境。最受欢迎和最有前途的技术之一是使用环保聚合物固定农药。在进行的研究中，证明丙交酯/乙交酯共聚物家族由于在土壤中的降解非常慢而不适用于该目的。我们研究了新合成的聚（l-丙交酯-共-乙交酯）-聚（乙二醇）-聚（l-丙交酯-乙交酯乙交酯（PLGA-PEG-PLGA）对土壤的降解，活性污泥中的降解以及该三元共聚物作为生物降解的载体用于控制两种常用除草剂（灭草灵和戊二甲灵）的有用性。三元共聚物链中甚至少量的PEG嵌段的存在都会略微增加聚合物链的亲水性，从而增加其在土壤环境中的水解敏感性以及意外地强烈的酶促降解性。用作载体PLGA-PEG-PLGA三元共聚物的无定形性以及在降解过程中没有增加结晶度的现象的缺乏使得能够实现降解的均匀进行，因此获得了相对恒定地释放测试的除草剂。通过这种方式，