澳洲留学申请文书代写-合成塑料的生产用途

通过本篇澳洲留学申请文书代写-合成塑料的生产用途可以看出，合成塑料每年造成近2.3亿吨的浪费，尽管这些塑料有许多用途，但由于损耗，还是需要更换这些产品。因此，迫切需要多核苷酸、聚酰胺、多糖化合物等生物基材料来替代合成塑料(Chee et al, 2010)。多羟基烷属多氧酵母。它们是生物可降解的，也有热塑性的特性(Chee et al, 2010)。正是由于这一因素，它在现代引起了人们的注意。这些多羟基烷烃有很多问题。多羟基烷烃(PHA)是一种线性聚合化合物，主要由细菌发酵脂类或糖产生(Chee et al, 2010)。这些化合物有很多生物医学用途。接下来有关澳洲留学申请文书代写-合成塑料的生产用途分享给留学生阅读如下。

In order to produce the Agropolymers some experimentation are currently being undertaken. Anne, 2011, has elucidated one particular experiment. In this process, the initial medium of starch was found to contain ten to twenty-five percentage weight% of amylose, seventy five to eighty percentage of amylopectine, 0.05 wt% proteins based on dry weight of product (Anne, 2011). This was to increase within a classical co-rotating extruder with 12 heating zones. The temperature profile that was maintained were 30°C (feeder) / 30°C / 50°C / 60°C / 70°C / 80°C / 90°C / 90°C / 100°C / 120°C / 120°C / 160°C (die) (Anne, 2011). However, in this process, the by-product of starch in the form of foam was higher and the final extruded product was found to lack a strong mechanical structure. This drawback of low mechanical structural strength has lead not performing this experiment in the industrial level. Nevertheless, a lot of insights were gained in this process. In order to overcome this mechanical structural deficiency, it has been observed that there is creation of a new kind of polymers known as Thermo-plastic like starch compounds (TPS) (Pillai, 2014). In this process, it has been observed that in high temperature under the presence of a plasticizer the new kind of material TPS is formed. This process is then made to undergo subsequent extrusion, shearing and plasticization. In this process, water plays an important role for the conversion of starch compounds in to highly strong thermophilic compounds that has a number of uses in mainstream societies. Moisture essentially controls the outcome of the plasticization of starch-based compounds. It has also been observed that addition of cellulose derivatives makes the starch compounds essentially more thermophilic and more resistant to water. There are a number of companies that have adopted the mainstream production of plasticized starch compounds.

Synthetic plastics account for nearly 230 million tonnes in wastage every year. Even though these plastics have a number of usages there is a need to replace these products owing to the wastage. Because of this, imperative needs bio based materials like polynucleotides, polyamide, polysaccharide compounds have been considered to replace synthetic plastics (Chee et al, 2010). Polyhydroxyalkanotaes belong to polyoxyesters. They are biodegradable and also have thermoplastic properties (Chee et al, 2010). It is because of this factor it has garnered attention in the modern era. These polyhydroxyalkanotaes has a number of issues. Polyhydroxyalkanotaes (PHA) is linear polymeric compounds that are basically produced by bacterial fermentation of lipids or sugars (Chee et al, 2010). There are a lot of biomedical uses for these compounds. The two major groups of PHA are short chain compounds and long chain compounds. Based on its structure and monomeric compounds PHA has been classified into short chain compounds or middle chain compounds (Chee et al, 2010). PHA has varied uses in many of the field. It can be used in all the areas where synthetic plastics can be used. The other major use of PHA is the use of the compounds in biomedical field. This is currently in the neo phase, there needs to be a lot more research done in order to successfully implement it in large scale.

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