本文關(guān)鍵詞： 石墨相氮化碳 納米片 復合物 聚乙烯醇 聚苯乙烯 熱穩(wěn)定性　出處：《東南大學》2017年碩士論文　論文類型：學位論文

【摘要】：作為大規(guī)模應用且日常生活必不可少的高分子聚合物,聚乙烯醇(PVA)和聚苯乙烯(PS)等在建筑、紡織及日常電子產(chǎn)品等領域有廣泛的應用,然而它們的熱定性不是很好。石墨相氮化碳(GPPCN)作為一種二維納米材料可以應用于高分子聚合物材料的阻燃。但是它存在兩個重要問題:(1)GPPCN在PVA、PS中分散較差;(2)GPPCN的阻燃效率低,難以使阻燃PVA、PS復合材料滿足實際應用。本論文主要致力于提高GPPCN在PVA、PS中的分散和增強GPPCN/PVA、GPPCN/PS復合材料的熱穩(wěn)定性。論文主要包括以下兩部分:1.以尿素為原料、高溫煅燒得到大比表面、淺黃色的石墨相氮化碳(GPPCN)。通過GPPCN與聚乙烯醇(PVA)之間的界面相互作用得到了 GPPCN/PVA納米復合材料。實驗中通過掃描電鏡、紅外、紫外、X射線衍射和熱分析等技術(shù)對材料的理化性質(zhì)進行了詳細的表征分析。實驗結(jié)果表明,樣品最初的熱分解溫度有一定的升高;樣品損失50 wt%的熱分解溫度提高了 11.8%;樣品的殘?zhí)柯示瓤瞻讟悠返臍執(zhí)柯矢摺＿@表明適當GPPCN的復合可以有效提高聚乙烯醇的熱穩(wěn)定性。2.通過靜電相互作用將GPPCN摻到聚苯乙烯(PS)中,利用GPPCN的高熱穩(wěn)定性及界面作用提高聚苯乙烯的熱穩(wěn)定性。實驗中通過掃描電鏡、紅外、紫外、X射線衍射和熱分析等技術(shù)對材料的理化性質(zhì)進行了詳細的表征分析。實驗結(jié)果表明雖然GPPCN與PS之間的作用不是很牢固,但樣品的熱分解溫度均有很大提高;樣品的殘?zhí)柯示瓤瞻讟悠返臍執(zhí)柯矢�。這表明適當GPPCN的摻入可以有效提高聚苯乙烯的熱穩(wěn)定性。
[Abstract]:Polyvinyl alcohol (PVA) and polystyrene polystyrene (PSPS) are widely used in the fields of architecture, textile and daily electronic products, which are widely used in large scale and daily life, such as polyvinyl alcohol (PVA) and polystyrene (PS). However, their thermal properties are not very good. Graphite phase carbon nitride GPPCNcan be used as a two-dimensional nano-material for flame retardancy of polymer materials, but it has two important problems: 1). GPPCN is in PVA. The dispersion of PS was poor; The flame retardant efficiency of GPPCN is low, so it is difficult to meet the practical application of the flame retardant PVAP-PS composite. This thesis is mainly devoted to improving the GPPCN in PVA. Dispersion and enhancement of the thermal stability of GPPCN-PVAP-GPPCNPS composites in PS. This paper mainly includes the following two parts: 1. Using urea as raw material, high temperature calcination to obtain large specific surface. Light yellow graphite phase carbon nitride GPPCN. by means of GPPCN and polyvinyl alcohol (PVA). GPPCN/PVA nanocomposites were obtained by interfacial interaction. The physicochemical properties of the samples were characterized by IR, UV X ray diffraction and thermal analysis. The experimental results showed that the initial thermal decomposition temperature of the samples increased to a certain extent. The pyrolysis temperature of the sample lost 50 wt% was increased by 11.8wt%. The carbon residue rate of the sample is higher than that of the blank sample, which indicates that the proper GPPCN composite can effectively improve the thermal stability of PVA. The GPPCN is doped into polystyrene by electrostatic interaction. PS2. The high thermal stability and interfacial interaction of GPPCN were used to improve the thermal stability of polystyrene. The physicochemical properties of the materials were characterized by X-ray diffraction and thermal analysis. The experimental results showed that the interaction between GPPCN and PS was not very strong. However, the thermal decomposition temperature of the samples has been greatly improved. The carbon residue rate of the sample is higher than that of the blank sample, which indicates that the proper addition of GPPCN can effectively improve the thermal stability of polystyrene.
【學位授予單位】：東南大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TB332

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