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  本文選題：錫氟磷酸鹽玻璃 + 雜化材料�。� 參考：《湘潭大學(xué)》2015年碩士論文

【摘要】：錫氟磷酸鹽玻璃(TFP)因具有較低的玻璃化轉(zhuǎn)變溫度(Tg)及優(yōu)異的加工性能而引起了人們的廣泛興趣,近年來關(guān)于錫氟磷酸鹽玻璃(TFP)的研究熱點集中在其等溫、非等溫結(jié)晶動力學(xué)、結(jié)晶態(tài)、相容性、熔融行為等,關(guān)于其流變行為的研究較少。本論文從探究TFP-聚合物雜化材料流變行為出發(fā),對比三種不同填料TFP、碳酸鈣(CaCO3)、硅灰石(CaSiO3)對PA6流變行為影響的異同;進(jìn)一步探究TFP加入對低流動樹脂PC流變行為的影響,了解其構(gòu)-效關(guān)系;最后將TFP引入至GF-PA6復(fù)合材料中,觀察TFP對該材料的流變行為的影響。不同填料對PA6流變行為研究結(jié)果顯示,少量TFP能使材料的模量和復(fù)數(shù)粘度(η*)降低,并且TFP填充體系出現(xiàn)較為顯著的剪切變稀。CaSiO3、CaCO3填充體系則表現(xiàn)不同的流變行為,在整個測試范圍內(nèi)材料的模量及η*均增加,CaCO3體系表現(xiàn)輕微的剪切變稀。CaSiO3、CaCO3呈無規(guī)則狀分布在基體中,TFP以細(xì)小玻璃微珠嵌在基體中。CaSiO3、CaCO3和基體PA6并不存在分子間化學(xué)相互作用,而TFP和PA6存在一定氫鍵相互作用。TFP降低PA6的熔點(Tm)和結(jié)晶溫度(Tc),而CaSiO3、CaCO3填充體系的Tm和Tc基本不變。TFP-PC雜化材料研究結(jié)果表明,在低頻區(qū)TFP-PC材料的儲能模量(G′)表現(xiàn)增大趨勢,但當(dāng)TFP低于30%時雜化材料的損耗模量(G″)都低于純PC;TFP的加入使PC的η*下降,并且出現(xiàn)剪切變稀行為,當(dāng)TFP含量超過30%時η*劇增,同時剪切變稀更加明顯,表明TFP很大程度上改善了PC的成型加工性能。TFP以細(xì)小顆粒均勻分散在PC基體中,且二者有明顯的過渡相,界面層模糊;在成型加工過程中TFP發(fā)生形變,當(dāng)TFP含量較高時出現(xiàn)團(tuán)聚現(xiàn)象。因此推測TFP與PC基體間存在相互作用,紅外譜圖表明這種相互作用可能是氫鍵作用;DSC測試發(fā)現(xiàn)加入TFP降低了PC的Tg,TFP在PC基體中表現(xiàn)出一定的塑化作用。通過研究TFP-GF-PA6三元復(fù)合材料流變行為,得出以下結(jié)論:在低頻區(qū),TFP加入使得GF-PA6復(fù)合體系的η*、G′以及G″均出現(xiàn)增加,高頻區(qū)則減小,材料各流變參數(shù)均表現(xiàn)較強的頻率依賴性。材料出現(xiàn)一定程度的剪切變稀,加工性能得到較為顯著的改善。含量較少的TFP在體系中以細(xì)小玻璃微珠分布,當(dāng)TFP含量達(dá)到50%時發(fā)生團(tuán)聚現(xiàn)象。在基體中引入GF并未影響PA6和TFP間的氫鍵作用;TFP降低了復(fù)合體系的Tm和Tc,同時結(jié)晶速率也有一定的下降。
[Abstract]:Tin fluorophosphate glass (TFP) has attracted wide interest due to its low glass transition temperature (TG) and excellent processability. In recent years, the research focus on TFPs has focused on its isothermal and non-isothermal crystallization kinetics. There are few studies on the rheological behavior of crystalline state, compatibility, melting behavior and so on. Based on the study of rheological behavior of TFP-polymer hybrid materials, the effects of three different fillers, calcium carbonate, calcium carbonate and wollastonite on the rheological behavior of PA6 were compared, and the effects of TFP addition on the rheological behavior of low flow resin PC were further investigated. Finally, TFP was introduced into the GF-PA6 composite to observe the effect of TFP on the rheological behavior of the composite. The experimental results of rheological behavior of PA6 with different fillers show that a small amount of TFP can decrease the modulus and complex viscosity (畏 _ (n) of the material, and that the shearing thinning of TFP filled system. CaSiO _ 3 / CaCO _ 3 filled system shows different rheological behavior. In the whole testing range, the modulus and 畏 * of Caco _ 3 system showed slight shear thinning. CaSiO _ 3 / CaCO _ 3 distributed irregularly in the matrix. There was no intermolecular chemical interaction between the matrix and the matrix PA6, which was embedded in the matrix with fine glass beads. However, there exists a certain hydrogen bond interaction between TFP and PA6. TFP decreases the melting point (Tm) and crystallization temperature (Tc) of PA6, while the Tm and TC of CaSiO3 / CaCO3 filled system are almost unchanged. The results show that the storage modulus of TFP-PC material increases in low frequency region. However, the loss modulus (G ") of the hybrid material is lower than that of pure PC-TFP when TFP is lower than 30%. The 畏 * of PC decreases and the shear thinning behavior occurs. When the content of TFP exceeds 30%, 畏 * increases dramatically, and the shear thinning becomes more obvious. The results show that TFP greatly improves the processing performance of PC. TFP is dispersed uniformly in the PC matrix with fine particles, and the interfacial layer is blurred and the TFP is deformed during the molding process. When the content of TFP is high, the agglomeration occurs. Therefore, the interaction between TFP and PC matrix was speculated, and the IR spectra showed that the interaction was probably due to hydrogen bonding. It was found that the addition of TFP reduced the plasticization of TFP in PC matrix to a certain extent. By studying the rheological behavior of TFP-GF-PA6 ternary composites, the following conclusions can be drawn: the addition of TFP-GF-PA6 in low frequency region can increase the 畏, G 'and G "of GF-PA6 composite system, but decrease in the high frequency region. The rheological parameters of the composites show a strong frequency dependence. The material is shearing thinning to a certain extent, and the processing property is obviously improved. The TFP with less content was distributed as fine glass beads in the system, and agglomeration occurred when the content of TFP reached 50%. The addition of GF into the matrix did not affect the hydrogen bond interaction between PA6 and TFP. The Tm and Tc of the composite system were decreased, and the crystallization rate was also decreased to a certain extent.
【學(xué)位授予單位】：湘潭大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB332

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本文編號：1913423