坡缕石复配阻燃剂阻燃LLDPE的性能研究
摘要
线性低密度聚乙烯(LLDPE)被广泛的应用于各个领域。其制品从薄膜、日常用品到电线电缆护套等。但是LLDPE的氧指数仅为17.8,属于易燃材料,且燃烧时产生熔滴,不易熄灭,极易造成火灾,对人们的生命和财产安全形成巨大的威胁,因此提高其阻燃性和减少其在燃烧时释放出的有毒气体是很重要的。
本论文由以下两部分组成:
第一部分:文献综述
本部分回顾了阻燃剂的发展历史、种类、阻燃机理及无卤阻燃LLDPE的最新研究状况。分析了无卤阻燃的重要性和必要性。比较了含卤阻燃剂和无卤阻燃剂的优缺点,得出无卤阻燃剂无毒、发烟量低等优点,并展望了其未来。
第二部分:坡缕石复配阻燃剂阻燃LLDPE的研究
本部分分别研究了无卤阻燃剂氢氧化镁、红磷、多聚磷酸胺、坡缕石和其他阻燃剂单独阻燃LLDPE的阻燃能力,以及坡缕石与各种阻燃剂复配的阻燃效果,并制得了LLDPE复合材料。根据氧指数和水平垂直燃烧实验测试,坡缕石复配体系是有效的、可行的。复配阻燃剂对LLDPE具有较好的阻燃效果及综合性能,LLDPE复合材料属于较好的阻燃材料。复合材料通过了电镜表征;通过TG分析了其热降解性;通过万能力学试验机等仪器测试了其物理性能。阻燃剂经过表面改性后能使复合材料的抗拉强度等力学性能得到提高,经测试,复合材料的力学性能和阻燃性能均达到最大值,断裂伸长率为75.142%,抗拉强度为7.282MPa,氧指数为30.5,材料的燃烧性能达到UL 94V-0级,因此其具有潜在的工业应用价值。
本论文首次将坡缕石引入LLDPE阻燃性能研究,为LLDPE阻燃研究拓宽了领域,同时也为当地大量的坡缕石矿产资源开发了新的应用前景。
Linearity low density polyethylene(LLDPE) is extensively used in many fields, its products include film, daily-appliance, cable and wire, etc. However LLDPE has low limiting oxygen index (LOI) value of 17.8 and is flammable and there is a great deal of flux-drop when it is being burned, which is easy to bring about fire. This is a threat to people and property. Therefore, it is very important to improve the flame retardance and reduce the emissions of smoke and poisonous gases in the applications of LLDPE materials.
The thesis consists of two parts as follows:
Part one: Review
This part looks back to the development of the halogen-free flame retardants from the view of many aspects such as the history, sorts, the burning mechanism and the development trend of the halogen-free fire retardant LLDPE. The importance and necessity of the halogen-free flame retardants was given in this part. Compare halogen-containing flame retardants with halogen-free flame retardants, halogen-free flame retardants are of low poisonous and produce little smoke, so they have a good future.
Part two: LLDPE/palygorskite flame retardant composites
In this part, fire retardation of LLDPE were researched with several non-halogen of flame-retardant like hydroxide, red phosphorus, APP, palygorskite and some fire retardant additions, the LLDPE/palygorskite flame retardant composites were prepared. According to LOI and UL-94 standard studies, the cooperativity of palygorskite and other flame-retardants were measured and lysed. The results indicate that the system has a good properties of flame-retardant and overall properties on LLDPE. LLDPE composites belongs to excellent flame retardant material. The composite were characterized by TEM and TG. The tensile strength investigation indicated that the materials has better physical and mechanical properties by the surface modification. The mechanical properties and the flame retardancy reach to the maximum, tensile strength is 7.282MPa,tensile elongation is 75.142%, vertical combustion rate could reach UL94 V-0 rate. And it will has the potential applications in industry.
This paper contained the research of the properties of inflaming retarding which introduced the palygorskite for the first time in LLDPE, it extended the LLDPE inflaming retarding research field, in the same time developed a new application for the abundant palygorskite resource of the local.
本论文由以下两部分组成:
第一部分:文献综述
本部分回顾了阻燃剂的发展历史、种类、阻燃机理及无卤阻燃LLDPE的最新研究状况。分析了无卤阻燃的重要性和必要性。比较了含卤阻燃剂和无卤阻燃剂的优缺点,得出无卤阻燃剂无毒、发烟量低等优点,并展望了其未来。
第二部分:坡缕石复配阻燃剂阻燃LLDPE的研究
本部分分别研究了无卤阻燃剂氢氧化镁、红磷、多聚磷酸胺、坡缕石和其他阻燃剂单独阻燃LLDPE的阻燃能力,以及坡缕石与各种阻燃剂复配的阻燃效果,并制得了LLDPE复合材料。根据氧指数和水平垂直燃烧实验测试,坡缕石复配体系是有效的、可行的。复配阻燃剂对LLDPE具有较好的阻燃效果及综合性能,LLDPE复合材料属于较好的阻燃材料。复合材料通过了电镜表征;通过TG分析了其热降解性;通过万能力学试验机等仪器测试了其物理性能。阻燃剂经过表面改性后能使复合材料的抗拉强度等力学性能得到提高,经测试,复合材料的力学性能和阻燃性能均达到最大值,断裂伸长率为75.142%,抗拉强度为7.282MPa,氧指数为30.5,材料的燃烧性能达到UL 94V-0级,因此其具有潜在的工业应用价值。
本论文首次将坡缕石引入LLDPE阻燃性能研究,为LLDPE阻燃研究拓宽了领域,同时也为当地大量的坡缕石矿产资源开发了新的应用前景。
Linearity low density polyethylene(LLDPE) is extensively used in many fields, its products include film, daily-appliance, cable and wire, etc. However LLDPE has low limiting oxygen index (LOI) value of 17.8 and is flammable and there is a great deal of flux-drop when it is being burned, which is easy to bring about fire. This is a threat to people and property. Therefore, it is very important to improve the flame retardance and reduce the emissions of smoke and poisonous gases in the applications of LLDPE materials.
The thesis consists of two parts as follows:
Part one: Review
This part looks back to the development of the halogen-free flame retardants from the view of many aspects such as the history, sorts, the burning mechanism and the development trend of the halogen-free fire retardant LLDPE. The importance and necessity of the halogen-free flame retardants was given in this part. Compare halogen-containing flame retardants with halogen-free flame retardants, halogen-free flame retardants are of low poisonous and produce little smoke, so they have a good future.
Part two: LLDPE/palygorskite flame retardant composites
In this part, fire retardation of LLDPE were researched with several non-halogen of flame-retardant like hydroxide, red phosphorus, APP, palygorskite and some fire retardant additions, the LLDPE/palygorskite flame retardant composites were prepared. According to LOI and UL-94 standard studies, the cooperativity of palygorskite and other flame-retardants were measured and lysed. The results indicate that the system has a good properties of flame-retardant and overall properties on LLDPE. LLDPE composites belongs to excellent flame retardant material. The composite were characterized by TEM and TG. The tensile strength investigation indicated that the materials has better physical and mechanical properties by the surface modification. The mechanical properties and the flame retardancy reach to the maximum, tensile strength is 7.282MPa,tensile elongation is 75.142%, vertical combustion rate could reach UL94 V-0 rate. And it will has the potential applications in industry.
This paper contained the research of the properties of inflaming retarding which introduced the palygorskite for the first time in LLDPE, it extended the LLDPE inflaming retarding research field, in the same time developed a new application for the abundant palygorskite resource of the local.
引文
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