可降解颗粒：塑料降解的方法有哪些?

　　塑料降解的方法有哪些?

What are the methods for plastic degradation?

　　聚乳酸（PLA）是由植物糖分提取的丙交酯单体聚合而成，在工业堆肥下可完全降解为水和二氧化碳。

Polylactic acid (PLA) is polymerized from propylene glycol monomers extracted from plant sugars and can be completely degraded into water and carbon dioxide under industrial composting.

　　聚乙醇酸(PGA)：全生物降解材料，“环境友好”属性突出

Polyglycolic acid (PGA): a fully biodegradable material with outstanding "environmentally friendly" properties

　　PGA为全生物降解材料，其降解条件温和，在水和微生物作用下，在自然环境中能实现快速降解，终降解产物为二氧化碳和水。除此之外，PGA还能在海水中进行降解，其降解产物对人体和环境皆是无害的。

PGA is a fully biodegradable material with mild degradation conditions. It can achieve rapid degradation in the natural environment under the action of water and microorganisms, and the final degradation products are carbon dioxide and water. In addition, PGA can also be degraded in seawater, and its degradation products are harmless to both humans and the environment.

　　聚羟基脂肪酸酯（PHA）是由微生物通过各种碳源发酵而合成的不同结构的脂肪族共聚聚酯，不仅能够用于包装材料、农膜等，还能广泛的应用于药品、化妆品、动物饲料等领域。

Polyhydroxyalkanoates (PHA) are different structured aliphatic copolyesters synthesized by microorganisms through fermentation from various carbon sources. They can be used not only in packaging materials, agricultural films, but also widely in fields such as pharmaceuticals, cosmetics, and animal feed.

　　二氧化碳共聚物（PPC）是一种以二氧化碳和环氧丙烷为原料共聚制备得到的一种新型高分子材料，其中聚合物中二氧化碳部分可以高达百分之四十。二氧化碳共聚物是石化行业关注的友好型塑料原料，具有资源和能源消耗少、对生态和环境污染小、再生利用率高的特点。二氧化碳共聚物作为环保产品和高科技产品，不但可以减少对石油的消耗，而且环境适应性也很理想，它的生产和应用，无论从环境保护，或是从资源再生利用的角度看，都具有重要的意义。

Carbon dioxide copolymer (PPC) is a new type of polymer material prepared by copolymerization of carbon dioxide and epichlorohydrin, in which the carbon dioxide portion of the polymer can reach up to 40%. Carbon dioxide copolymers are friendly plastic raw materials of concern to the petrochemical industry, characterized by low resource and energy consumption, low ecological and environmental pollution, and high recycling efficiency. Carbon dioxide copolymers, as environmentally friendly and high-tech products, not only reduce the consumption of petroleum, but also have ideal environmental adaptability. Their production and application are of great significance, whether from the perspective of environmental protection or resource recycling.

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