热塑性丁苯橡胶主要有四大用途:橡胶制品、沥青改性剂、胶黏剂和树脂改性剂。在橡胶制品方面,适于制造鞋底、玻璃门窗密封胶条、胶板、垫圈、胶管和胶带等。作为树脂改性剂,SBS分别与PP、PE、PS共混物,可明显改善制品的低温性能和抗冲击性能,SBS用于胶粘剂,具有高固体物质含量、快干、耐低温的特点;SBS作为路面沥青改性剂,可明显改进沥青的耐候性和耐负载性能。
Thermoplastic styrene butadiene rubber has four main uses: rubber products, asphalt modifier, adhesive and resin modifier. In terms of rubber products, it is suitable for manufacturing shoe soles, glass door and window sealant strips, rubber plates, gaskets, rubber hoses and tapes. As a resin modifier, SBS blends with PP, PE and PS can significantly improve the low-temperature properties and impact resistance of products. SBS used in adhesives has the characteristics of high solid content, quick drying and low-temperature resistance; As a pavement asphalt modifier, SBS can significantly improve the weatherability and load resistance of asphalt.
热塑性丁苯橡胶的热塑性弹性体分子链的结构特点是由化学组成不同的树脂段(硬段)和橡胶段(软段)构成。硬段的链段间作用力足以形成“物理交联”,软段则是具有较大自由内旋转能力的高弹性链段;而软硬段又以适当的次序排列并以适当的方式联接起来。
The molecular chain of thermoplastic elastomer of thermoplastic styrene butadiene rubber is composed of resin segment (hard segment) and rubber segment (soft segment) with different chemical composition. The force between the hard segments is enough to form "physical crosslinking", while the soft segment is a highly elastic segment with greater free internal rotation; The soft and hard segments are arranged in appropriate order and connected in appropriate ways.
硬段的这种物理交联是可逆的,即在高温下失去约束大分子组成的能力,呈现塑性。当温度降至室温时,这些“交联”又恢复,起到类似硫化橡胶交联点的作用。正是由于热塑性弹性体的这种链结构特点和交联状态的可逆性,使它在常温下显示硫化胶的弹性、强度和形变特性等物理机械性能,可代替传统硫化胶制造某些橡胶制品。
The physical crosslinking of hard segment is reversible, that is, it loses the ability to restrict the composition of macromolecules at high temperature and presents plasticity. When the temperature drops to room temperature, these "crosslinks" resume, playing a role similar to the crosslinking point of vulcanized rubber. Because of the chain structure and the reversibility of crosslinking state of thermoplastic elastomer, it shows the physical and mechanical properties such as elasticity, strength and deformation of vulcanizate at room temperature, and can replace the traditional vulcanizate to manufacture some rubber products.
在高温下硬段会软化或熔化,在加压下呈现粘性流动,显现热塑性塑料的加工特性,可采用注射成型和吹塑成型等热塑性塑料的方法,比传统硫化橡胶常用的压缩、挤出、压延成型速度快、周期短,所需后硫化设备少,生产费用低。
The hard segment will soften or melt under high temperature, and show viscous flow under pressure, showing the processing characteristics of thermoplastic. Injection molding, blow molding and other thermoplastic methods can be used, which has faster compression, extrusion and calendering molding speed, shorter cycle, less post vulcanization equipment and lower production cost than those commonly used for traditional vulcanized rubber.
氢氧化钾厂家认为热塑料弹性体还可用真空、吹塑成型等传统橡胶不能使用的迅速、经济的方法加工。重复加工对其性能或加工特性无明显损害,废品和边角料可重新加工,用过材料可与新料一起使用,大大提高了材料利用率,极大地减少环境污染,被认为是环境友好材料。
Potassium hydroxide manufacturers believe that thermoplastic elastomers can also be processed quickly and economically by vacuum, blow molding and other methods that traditional rubber cannot use. Repeated processing has no obvious damage to its performance or processing characteristics. Waste products and leftover materials can be reprocessed. Used materials can be used together with new materials, which greatly improves the utilization rate of materials and greatly reduces environmental pollution. It is considered as an environmentally friendly material.
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