2022碳纖維和玻璃纖維組合增強(qiáng)塑料組分含量和孔隙含量的測定

碳纖維和玻璃纖維組合增強(qiáng)塑料組分含量和孔隙含量的測定PAGEPAGE1碳纖維和玻璃纖維組合增強(qiáng)塑料組分含量和孔隙含量的測定范圍本文件適用于在一定條件下基體樹脂能被硫酸完全消化分解而又不過分腐蝕纖維的碳纖維和玻璃纖維組合增強(qiáng)塑料。（GB/T1033.1塑料非泡沫塑料密度的測定第1部分：浸漬法、液體比重瓶法和滴定法GB/T3855GB/T9914.2GB/T29761GB/T30019碳纖維密度的測定GB/T40724GB/T41063GB∕T40724界定的術(shù)語和定義適用于本文件。原理若纖維增強(qiáng)材料質(zhì)量在消化過程中有變化，則需要進(jìn)行校正。試樣試樣質(zhì)量約2g~4g。每組試樣至少3個(gè)。）20mm5.15mm。注：由于樣品存在差異，取樣位置和取樣形狀會(huì)影響測試結(jié)果。）（50±10）%24h；5.4.124h。。儀器0.1mg；450℃~65020℃；6.1.3鼓風(fēng)干燥箱：能控制在（150±5）℃；10℃；250mL；4.5μm~9.0μm；30mL；試劑6.2.1硫酸：95%~98%分析純；6.2.2過氧化氫：30%~35%分析純；6.2.3丙酮：分析純；試驗(yàn)前，試樣按5.4進(jìn)行狀態(tài)調(diào)節(jié)。稱量試樣質(zhì)量??0，精確至0.1mg。按照GB/T1033.1測定試樣的密度，密度記為ρ。注：若只測定試樣各組分質(zhì)量含量，此步驟可省略。95%~98%10mL。在通風(fēng)櫥內(nèi)，將裝有硫酸和試樣的容器放在加熱臺(tái)上加熱，消化液由室溫升至設(shè)定溫度時(shí)間不得少于15min。持續(xù)加熱直到纖維完全分散。推薦加熱溫度：環(huán)氧、聚酯類基體纖維增強(qiáng)塑料推薦加熱溫度為（220±10）℃；酚醛樹脂類基體纖維增強(qiáng)塑料推薦加熱溫度為（285±5）℃。消化后的混合液，用30%~35%過氧化氫沿瓶壁緩慢滴加并充分?jǐn)嚢?，至混合液澄清?.47.5稱量洗凈并恒重的過濾器，精確至0.1mg，質(zhì)量記為??1。PH注：加熱消化、滴加過氧化氫和抽濾等操作均須在通風(fēng)櫥內(nèi)進(jìn)行，并注意安全防護(hù)。0.1mg??2??2??17.3~7.9。0.1mg??3。將7.9過濾器中的纖維全部放入坩堝內(nèi)。將帶有殘余物的坩堝從馬弗爐中取出，放入干燥器中，冷卻至室溫，稱量，精確至0.1mg。??4??4與??37.9中所得碳纖維和玻璃纖維的總質(zhì)量與7.16中所得玻璃纖維的質(zhì)量之差為碳纖維的質(zhì)量。計(jì)算按公式（1）計(jì)算碳纖維和玻璃纖維組合增強(qiáng)塑料中玻璃纖維質(zhì)量含量：????=??4???3×100··································································(1)????0(1???0??)式中：（%）；??0（g）；??3——坩堝質(zhì)量，單位為克（g）；??4——灼燒后坩堝和殘余物總質(zhì)量，單位為克（g）；??0??——玻璃纖維空白試驗(yàn)的纖維質(zhì)量損失率。按公式（2）計(jì)算碳纖維和玻璃纖維組合增強(qiáng)塑料中碳纖維質(zhì)量含量：????

=(??2???1)?(??4???3)×100····························································(2)??0(1???0??)式中：????——碳纖維和玻璃纖維組合增強(qiáng)塑料中碳纖維質(zhì)量含量（%）；??1——過濾器質(zhì)量，單位為克（g）；??2——消化后過濾器、碳纖維和玻璃纖維的總質(zhì)量，單位為克（g）；??0??——碳纖維空白試驗(yàn)的纖維質(zhì)量損失率。按公式（3）計(jì)算碳纖維和玻璃纖維組合增強(qiáng)塑料中樹脂質(zhì)量含量：????=100??????????···································································(3)式中：????——碳纖維和玻璃纖維組合增強(qiáng)塑料中樹脂質(zhì)量含量（%）。注1：若無法獲得碳纖維和玻璃纖維，則??0??=0、??0??=0。2GB/TAGB/T9914.2按公式（4）計(jì)算碳纖維和玻璃纖維組合增強(qiáng)塑料中玻璃纖維體積含量：????

=????×??·············································································(4)????式中：????——碳纖維和玻璃纖維組合增強(qiáng)塑料中玻璃纖維體積含量（%）；??——碳纖維和玻璃纖維組合增強(qiáng)塑料密度，單位為克每立方厘米（g/cm3）；????——玻璃纖維密度，單位為克每立方厘米（g/cm3）。注：玻璃纖維密度按GB/T41063測定，或由生產(chǎn)商家提供。（5）????=????×??·············································································(5)??????式中：????——碳纖維和玻璃纖維組合增強(qiáng)塑料中碳纖維體積含量（%）；????——碳纖維密度，單位為克每立方厘米（g/cm3）。注：碳纖維密度按GB/T30019測定，或由生產(chǎn)商家提供。（6）????=????×??·············································································(6)??????式中：????——碳纖維和玻璃纖維組合增強(qiáng)塑料中樹脂體積含量（%）；????——樹脂澆鑄體密度，單位為克每立方厘米（g/cm3）。注：樹脂澆鑄體密度按GB/T1033.1測定，或由生產(chǎn)商家提供。按公式（7）計(jì)算碳纖維和玻璃纖維組合增強(qiáng)塑料中孔隙含量：????=100???????????????···························