Blend of thermoplastic starch and polypropylene and preparation method thereof

Abstract

The invention discloses a blend of thermoplastic starch and polypropylene, comprising the following materials based on parts by weight: 50-65 parts of starch, 10-25 parts of polypropylene, 12-25 parts of glycerol, 1-3 parts of stearic acid, 0.5-2 parts of aluminate coupling agent, 3-5 parts of deca-poly diolein, 7-12 parts of talc powder. A preparation method for the blend of thermoplastic starchand polypropylene, comprising the following steps: a), pouring starch and glycerol, which are weighed according to the percentages, into a high-speed blender, and mixing them at 100-120 degrees centigrade for 8-10 min, and taking the mixture out and standing it for twelve hours to form thermoplastic starch; b), adding the polypropylene, stearic acid, aluminate coupling agent, deca-poly diolein and talc powder, which are weighed according to the percentages, and the thermoplastic starch formed in the step a) into the high-speed blender, and uniformly stirring them to form a blend. The blend ofthermoplastic starch and polypropylene disclosed in the invention has excellent mechanical property.

Description

technical field [0001] The invention relates to the technical field of polymer material modification, in particular to a blend of thermoplastic starch and polypropylene and a preparation method thereof. Background technique [0002] Since the 20th century, the material revolution has played an extremely important role in the profound changes in human society. Especially in the last 50 years, the progress of polymer synthesis technology has greatly promoted the development of synthetic resin industry. Due to the characteristics of light weight, good mechanical properties, water resistance, chemical corrosion resistance, beautiful appearance, convenient manufacturing and installation, and low price, plastic products have rapidly replaced metal, wood, glass and even paper products to a large extent. It is widely used in various sectors of the national economy, promoting the sustainable development of industry and agriculture and the rise of contemporary high technology. Howev...

AI Technical Summary

Problems solved by technology

However, with the development of the plastics industry, some of its own problems have gradually emerged: (1) The raw materials are limited, and the resources are becoming more and more scarce

According to research, the world's conventional oil resources can only be used until 2070. The emergence of the "oil crisis" will inevitably lead to a decline in plastic production, and at the same time, the price of plastic will gradually rise, affecting social stability.

(2) Seriously pollute the environment

[0004] Due to the hydrophilicity of starch and the hydrophobicity of general-purpose plastics such as polypropylene and polyethylene, the compatibility between starch and matrix materials is very poor, which easily leads to poor dispersion of starch in the system, and the stress cannot pass through both sides under the action of external force. The effective transfer at the phase interface will eventually lead to a great decrease in the mechanical properties of the system