a国产,中文字幕久久波多野结衣AV,欧美粗大猛烈老熟妇,女人av天堂

當前位置:主頁 > 科技論文 > 材料論文 >

高效阻燃聚丙烯復合材料的制備與性能研究

發(fā)布時間:2018-06-21 01:32

  本文選題:聚丙烯 + 阻燃性; 參考:《河北大學》2016年碩士論文


【摘要】:在聚丙烯(Polypropylene,簡稱PP)中添加阻燃劑和其他改性劑制備復合材料是擴展其使用功能和適用環(huán)境的重要方法。本文針對聚丙烯復合材料難于兼具高阻燃性能與高力學性能的矛盾,采用兩種阻燃劑與埃洛石納米管(HNTs)復配,制備了系列PP復合材料,進行了阻燃改性和增強增韌改性研究,所制備復合材料具有優(yōu)良的阻燃和力學性能。采用雙螺桿擠出機組通過熔融共混的方法制備了不同的PP阻燃復合材料,并進行了極限氧指數(shù)、垂直燃燒性能、宏觀力學性能測試和界面性能表征,研究了沖擊斷面和燃燒后的試樣內外表面形貌,確定了研究維度內的較優(yōu)配方,并對材料制備工藝做了簡要探討。本論文主要成果為:1、采用四種環(huán)保的阻燃體系對聚丙烯材料進行阻燃改性。結果表明,阻燃劑028A單獨使用對聚丙烯材料具有良好的阻燃效果,但對材料的力學性能有相對較大的不良影響;阻燃劑510單獨使用對于材料的力學性能有較好的保持效果,但其阻燃性能欠佳。當使用復配阻燃劑028A與510(30%,比例為2:1)時,聚丙烯復合材料在具有良好阻燃性的同時能夠保持較好的力學性能,其極限氧指數(shù)可以達到31.5%。2、在聚丙烯復合材料中加入少量HNTs可以使復合材料的力學性能得到較大的改善。在本實驗中,加入2%的改性HNTs,復合材料的抗沖擊韌性較不添加HNTs之前提高了40.2%,拉伸強度提高了63.3%,彎曲強度提高了84.9%。加入少量的改性HNTs在提高了基體的力學性能的同時還小幅度提高了材料的阻燃性能,加入2%的改性HNTs,復合材料的氧指數(shù)較未添加之前提高了1.9%,達到32.1%。3、在聚丙烯復合材料中加入POE可以實現(xiàn)對材料的增韌,但是材料的極限氧指數(shù)迅速降低;4、復合材料在加工過程中溫度不宜超過200℃,各區(qū)段以190℃為宜,避免造成阻燃劑分解。
[Abstract]:Adding flame retardant and other modifiers to PP / PP composites is an important method to expand its function and suitable environment. In view of the contradiction between high flame retardancy and high mechanical properties of polypropylene composites, a series of PP composites were prepared by using two kinds of flame retardants and HNTs, and the flame retardant modification and toughening modification were carried out. The composites have excellent flame retardancy and mechanical properties. Different PP flame retardant composites were prepared by melt blending in twin-screw extruder group. The limiting oxygen index, vertical combustion performance, macroscopic mechanical properties and interface properties were measured and characterized. The internal and external surface morphology of the impact section and the sample after combustion were studied, the optimum formulation in the dimension of the study was determined, and the preparation process of the material was briefly discussed. The main achievement of this paper is 1: 1. Four kinds of environmental-friendly flame-retardant systems are used to modify polypropylene materials. The results showed that flame retardant 028A alone had a good flame retardant effect on polypropylene material, but had a relatively large adverse effect on the mechanical properties of the material, and flame retardant 510 alone had a better retention effect on the mechanical properties of the material. But its flame retardancy is not good. When the composite flame retardant 028A was used with the ratio of 2: 1, the polypropylene composite could maintain good mechanical properties while having good flame retardancy. The limit oxygen index can reach 31.5 and 0.2. The mechanical properties of the composites can be improved greatly by adding a small amount of HNTs to polypropylene composites. In this experiment, the impact toughness, tensile strength and flexural strength of the composites increased by 40.2%, 63.3% and 84.9% respectively. The addition of a small amount of modified HNTs not only improved the mechanical properties of the matrix, but also improved the flame retardancy of the materials by a small margin. When 2% of modified HNTs was added, the oxygen index of the composites increased by 1.9%, and reached 32.1%. Poe was added to the polypropylene composites to improve the toughness of the composites. However, the limiting oxygen index of the material decreases rapidly by 4, and the temperature of the composite material should not exceed 200 鈩,

本文編號:2046570

資料下載
論文發(fā)表

本文鏈接:http://www.wukwdryxk.cn/kejilunwen/cailiaohuaxuelunwen/2046570.html


Copyright(c)文論論文網All Rights Reserved | 網站地圖 |

版權申明:資料由用戶a7d3d***提供,本站僅收錄摘要或目錄,作者需要刪除請E-mail郵箱bigeng88@qq.com
久久午夜美女精品人体| 亚洲无人区午夜福利码高清完整版| 日本爽妇网| 青草国产| 久99久热爱精品免费视频37| 十九岁日本电影免费粤语| 久久精品国产亚洲AV嫖农村妇女| av老司机亚洲精品天堂| 大香伊蕉在人线国产最新2005| 青柠影院| 久在线视频| 超碰人人艹| √天堂资源地址在线官网| 日韩欧美激情| 成人情趣| 一区二区三区欧美日韩| 大学生一级一片全黄| 91少妇| 无人区一码二码三码4码区| 国内精品久久人妻互换| 五月丁香六月婷婷网线视频| 午夜免费啪视频| 51精品国产人成在线观看| 丁香五月缴情在线| 久久婷婷丁香五月综合五| 玩弄丰满少妇XXXXX性多毛 | 亚洲午夜成人片| 欧洲熟妇色XXXXX视频| 狠狠五月激情六月丁香| 四虎国产精品永久在线无码| 97人妻精品一区二区三区| 日bb视频| 视频库| av熟女人妻一区二区三区 | 日本一码| 婷婷影视| 久久小说网| 500篇欲乱小说少妇+小说 | 日韩精品无码一区二区三区免费| 亚洲综合另类小说色区色噜噜| 国产精品视频免费一区二区|