本文關鍵詞： PVB UPVC 碳酸鈣 界面相容性 高填充　出處：《北京化工大學》2016年碩士論文　論文類型：學位論文

【摘要】：碳酸鈣作為一種親水憎油的極性填料,與PVC界面相容性較差,大量填充時易造成制品內(nèi)部的缺陷,破壞力學性能。PVB中的羥基可提供給碳酸鈣表面OH氫鍵結(jié)合點和Ca2+配位、靜電作用點,故兩者理論上具有良好的界面相容性。本文通過定量計算PVB/碳酸鈣、PVC/碳酸鈣的界面作用參數(shù),以此研究PVC/PVB/碳酸鈣復合材料中以PVB作為碳酸鈣粘接劑來對體系進行增韌增強的可能性：1、用擠出流延法制備PVB/碳酸鈣膜材料,通過測量拉伸強度得PVB/碳酸鈣界面參數(shù)遠大于PVC／碳酸鈣界面參數(shù)。紅外光譜分析結(jié)果表明,PVB與碳酸鈣表面的羥基之間形成氫鍵,發(fā)生締合。通過對PVB/碳酸鈣材料的SEM圖分析可知,PVB/碳酸鈣界面結(jié)合優(yōu)于PVC/碳酸鈣。2、設計正交實驗,通過雙輥開煉法壓制UPVC板材,并對其進行測試。得最佳因素水平：5份PVB,此時PVB/PVC相容性較好；1.5份DIDP,用于改善PVB分子鏈的運動能力；60份5000目碳酸鈣,其目數(shù)對沖擊性影響較大。最佳配方力學性能較空白樣,沖擊強度提升140.6%,同時拉伸強度和彎曲強度也有所提升。其中PVB因素對材料的力學性能影響最大�；炝瞎に嘊使材料的沖擊強度明顯增加,但材料的拉伸強度和彎曲強度有所降低。流變曲線分析表明,體系中加入PVB可促進塑化,降低平衡扭矩。熱失重實驗分析表明,制品主要有兩個熱失重階段,且PVB添加份數(shù)較多的體系熱穩(wěn)定性較好。3、通過實驗得,加入3份SD5型PVB使制品沖擊強度提升243.8%；加入3份SD1型使體系沖擊強度提升255.6%,但會使拉伸強度下降。當高粘度PVB與低粘度PVB復配比為2：1時,體系的綜合力學性能較好。由實驗結(jié)果可知,PVB對碳酸鈣高填充UPVC制品有較好的增韌效果,且保證材料的拉伸強度不會下降。
[Abstract]:As a hydrophilic and hydrophobic polar filler, calcium carbonate has poor compatibility with PVC interface. The hydroxyl group in PVB can provide the OH hydrogen bonding point and Ca2 coordination point on the surface of calcium carbonate and electrostatic action point. Therefore, they have good interfacial compatibility in theory. In this paper, the interface parameters of PVB / Caco _ 3 / PVC / Caco _ 3 are calculated quantitatively. The possibility of toughening and strengthening the system with PVB as the adhesive of calcium carbonate in PVC / PVB / calcium carbonate composite was studied. The PVB / calcium carbonate film material was prepared by extrusion casting method. The interface parameters of PVB / calcium carbonate were much larger than those of PVC / calcium carbonate by measuring tensile strength. The results of infrared spectroscopy showed that hydrogen bond was formed between PVB and hydroxyl groups on the surface of calcium carbonate. Through the SEM diagram analysis of PVB / calcium carbonate material, the interface bonding of PVB / calcium carbonate was better than that of PVC / calcium carbonate. The orthogonal experiment was designed. The UPVC sheet was compacted by double roll opening process and tested. The optimum factor level was 5 parts, and the compatibility of PVB/PVC was better. (1) DIDP, which was used to improve the mobility of PVB molecular chain. The number of calcium carbonate in 60 phr of calcium carbonate has a great influence on the impact property. The optimum formula has a better mechanical property than the blank sample, and the impact strength is increased by 140.6%. At the same time, the tensile strength and flexural strength were also improved. The PVB factor had the greatest influence on the mechanical properties of the material. The impact strength of the material was obviously increased by blending process B. However, the tensile strength and bending strength of the material decreased. The rheological curve analysis showed that the addition of PVB in the system could promote plasticization and reduce the equilibrium torque. There are mainly two thermogravimetric stages of the product, and the thermal stability of the system with more PVB content is better. The experimental results show that the impact strength of the product is increased 243.8% by adding 3 phr SD5 PVB. The impact strength of the system increased by 255.6 parts with the addition of 3 phr SD1 type, but the tensile strength decreased. When the ratio of high viscosity PVB to low viscosity PVB was 2: 1. The experimental results show that PVB has a good toughening effect on UPVC products filled with calcium carbonate, and the tensile strength of the composites will not decrease.
【學位授予單位】：北京化工大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TQ325.3;TB332

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