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塑料的基本概念.树脂→塑料→塑料制品. 树脂多数属于无定形有机物质,分天然树脂与合成树脂两类.树脂实际上是一些高分子化合物,随着分子量的差异或化学结构的不同,有粘稠流体,也有脆性或韧性固体,可用来制造塑料、粘合剂、涂料以及合成纤维等等. 塑料是以树脂为主要成份(多数是合成树脂,但也有天然产物),在一定条件下(如温度、压力等)可塑制成一定形状且在常温下保持形状不变的材料.根据组份不同,可分为单一组份与多组份塑料两大类.单一组份的塑料,基本上由树脂组成,其中仅含有少量辅助物质(如着色剂、润滑剂等),例如聚乙烯、聚苯乙烯、有机玻璃等.多组份塑料则除了树脂外,尚含有大量辅助物质(如增塑剂及填充剂等),例如酚醛、氨基塑料及
The basic concept of plastic.Plastic → plastic → plastic products.Most of the resin belongs to the amorphous organic material, divided into natural resins and synthetic resins are two types of resin is actually a number of polymer compounds, with the molecular weight differences or chemical structure, there are Viscous fluid, but also brittle or tough solid, can be used to make plastics, adhesives, coatings and synthetic fibers, etc. Plastic is a resin as the main ingredient (mostly synthetic resin, but also natural products), under certain conditions Such as temperature, pressure, etc.) can be plastic into a certain shape and maintain the shape of the material at room temperature.According to the different components, can be divided into single-component and multi-component plastic two categories.A single component of the plastic, basically It consists of a resin containing only a small amount of auxiliary substances such as colorants, lubricants, etc. such as polyethylene, polystyrene, organic glass, etc. Multicomponent plastics contain a large amount of auxiliary substances (such as plasticizers Agents and fillers, etc.), such as phenolic, aminoplast and