Types of biodegradable plastic pdf

Release time:2023-09-18 Number of views: 47

Title: Types of Biodegradable Plastic: A Comprehensive Guide

Introduction:
In recent years, there has been a growing concern about the tremendous environmental impact of traditional plastics. To address this issue, researchers and scientists have made significant advancements in developing biodegradable plastics. This article aims to provide a comprehensive overview of the different types of biodegradable plastics currently available, their properties, and their potential impact on our environment.

1. Polylactic Acid (PLA):
One of the most commonly used biodegradable plastics is Polylactic Acid (PLA). It is derived from renewable resources such as cornstarch or sugarcane. PLA has the advantage of being both biodegradable and compostable, making it suitable for a range of applications, including food packaging, disposable cutlery, and medical devices. However, PLA is relatively brittle and has limited heat resistance, which may restrict its use in some applications.

2. Polyhydroxyalkanoates (PHA):
Polyhydroxyalkanoates (PHA) are another group of biodegradable plastics. PHA is produced by bacteria through fermentation of sugars or vegetable oils. It offers excellent biodegradability and can break down in various environments, including soil, marine, and freshwater. PHA is versatile and can be used in applications such as packaging, agriculture, and even in the medical field. However, PHA production is still relatively expensive compared to traditional plastics.

3. Polybutylene Succinate (PBS):
Polybutylene Succinate (PBS) is a petroleum-based biodegradable plastic. It is synthesized through the polymerization of succinate. PBS is known for its good thermal and mechanical properties, as well as its high transparency. It can be used in various applications like packaging films, bottles, and disposable cutlery. Although PBS is not as commonly used as PLA or PHA, it offers a viable alternative to traditional plastics.

4. Polyethylene Terephthalate (PET):
Polyethylene Terephthalate (PET) is a widely used plastic in various industries. While traditional PET is not biodegradable, efforts have been made to create a biodegradable version known as bio-PET. Bio-PET is derived from plant-based sources and can be recycled or composted. It has similar properties to traditional PET, making it suitable for applications such as bottles, fibers, and packaging materials.

5. Polybutylene Adipate Terephthalate (PBAT):
Polybutylene Adipate Terephthalate (PBAT) is another biodegradable plastic widely used in packaging applications. PBAT is a copolymer formed by combining two renewable raw materials, adipic acid and terephthalic acid. It offers excellent biodegradability and can be composted together with organic waste. PBAT is commonly used as a blend with PLA or other biodegradable plastics to enhance its mechanical properties and broaden its applications.

Conclusion:
The development of biodegradable plastics provides a promising solution to the environmental impact caused by traditional plastics. From Polylactic Acid (PLA) to Polyhydroxyalkanoates (PHA), Polybutylene Succinate (PBS), Bio-PET, and Polybutylene Adipate Terephthalate (PBAT), the options for eco-friendly plastics are expanding. As consumers and businesses strive for more sustainable choices, the use of biodegradable plastics in various industries is expected to increase. By choosing biodegradable plastics, we contribute to the preservation of our environment and create a more sustainable future for generations to come.