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ASTM Molding Procedure 美國材料協(xié)會( ASTM)模塑成型步驟 ? Mold Temp 60 +/ 3C,模具溫度 60177。 contamination ? 對樣板進行雜物和污染物的目視檢測 ? Pellet appearance – 45 g of pellets poured into square tray 1 pellet deep ? 塑料粒子的外觀-將 45克塑料粒子倒入一個顆粒深度的方型盤中,檢查 – Fines are small particles 10 mesh (usually tails from poor cut) – 粒度小于 10目的為細料(通常為粒料切割不當(dāng)而產(chǎn)生的尾料) – Snake skins: thin streamers/films formed from abrasion/buildup of resin in transfer pipes – 蛇皮料:由于樹脂顆粒在輸料管道中摩擦和積聚而形成的薄的條帶/薄膜 – Angel hair: thin, small strands of fiber/film similar to snake skin (frequently ball together in clumps) – 毛邊料:類似于蛇皮料的薄的、小纖維條/薄膜束(常常團聚成為塊狀) – Chips: fragment of pellets – 片狀料:塑料粒子的碎片 – Smears: flattened pellets not cut cleanly – 扁平料;沒有完全切割好的扁平的塑料粒子 – Tails: pellets with small strands attached – knives not cutting well – 尾料:連有細小的料束的塑料粒子-切割刀片沒有切割好 – Doubles: two pellets joined by film – knives not cutting cleanly – 雙聯(lián)料:由薄膜連接的兩顆塑料顆粒-切割刀片沒有切割干凈 Filter Pressure Rise / Gel Test 過濾器壓力升高/凝膠試驗 ? Neither used at Chocolate Bayou, both run at Deer Park ? Chocolate Bayou兩種試驗均不進行, Deer Park兩種試驗都采用 ? In filter pressure rise test, resin is extruded long enough to flush extruder, a new filter disk is inserted, and a specific amount of resin (or time) is run and the pressure rise measured. This is an indication of resin cleanliness – normally not a problem with 4th generation catalysts ? 在過濾器壓力升高試驗中,先用樹脂樣進行足夠長時間的擠出以便將擠出機沖洗干凈,然后插入一張新的過濾盤,擠出規(guī)定量的樹脂(或運行規(guī)定的時間),測定壓力的升高。C下加熱一小時,稱重計算失重,計作揮發(fā)份百分比 ? For pellets, 5 g is place in a dish, heated for one hour at 165C. Weight lost is % volatiles. ? 對于顆粒狀樣品,取 5克樣品放置在預(yù)先稱重的一次性鋁盤中,然后在165186。C下冷凍,然后進行過濾 – The resulting solution is placed in a weighed pan, and heated at 120C for 2 hours. Material in pan is decalin solubles. – 將過濾所得的溶液放置在一個稱量盤中,在 120186。Polymer characterization and testing 聚合物特征和試驗 Testing and characterization (generally 3 categories) 試驗和特征(通??煞譃槿悾? ? Production lab testing for polymer QA release ? 為發(fā)放聚合物質(zhì)量保證書而進行的生產(chǎn)實驗室試驗 – Mfr, solubles, additives, etc, – 熔體流動速率( MFR)、可溶性和添加劑等 ? Nonroutine polymer structure testing ? 非常規(guī)的聚合物結(jié)構(gòu)試驗 – MWD, tacticity, melting behavior, – 分子量分布( MWD)、立構(gòu)規(guī)正度、熔融特性 ? Application testing (how does it perform post processing) ? 應(yīng)用試驗(在后加工過程中表現(xiàn)的特性) – Tensiles, HDT, flex mod, impact, etc, – 拉伸強度、熱變形溫度( HDT)、彎曲模量、抗沖擊強度等 – Testing of molded parts (microscopy, gloss, etc), – 對模塑零件進行的試驗(顯微鏡試驗、表面光澤等) Production testing 生產(chǎn)試驗 ? Mfr,熔體流動速率( MFR) ? Additive content,添加劑含量 ? Ethylene content,乙烯含量 ? Hexane extractables,己烷可抽提物 ? Decalin solubles,十氫化萘可溶物 ? Xylene extractables,二甲苯可抽提物 ? Volatiles,揮發(fā)份 ? Yellowness index,黃度指數(shù) ? Pellet size,塑料粒子尺寸 ? Powder particle size distribution,粉體顆粒度分布 ? Powder metals analysis,粉體金屬含量分析 ? Dirt / contamination / pellet appearance test,雜質(zhì)/污染物以及粒子的外觀試驗 ? Filter pressure rise / gel test,過濾器壓力升高/凝膠試驗 Mfr 熔體流動速率 ? ASTM D1238 ? 美國材料實驗協(xié)會- ASTM D1238( 試驗方法的標(biāo)準(zhǔn)) ? Measures viscosity of PP melt (a function of Mw) ? 測量聚丙烯熔體的粘度(是分子量的函數(shù)) ? Samples size from to grams (higher MFR requires more sample because more flows through machine during test) ? 樣品重量 ( MFR較高的樣品,由于在試驗中流經(jīng)測試儀器的流量較大,所以需要更多試樣量) ? Cylindrical chamber filled with resin and piston set in place ? 將被測樹脂填滿圓筒形的測試管,將活塞安放就位 ? After 4 minute preheat, weight placed on piston and piston pushed to calibration mark (6 minutes) ? 預(yù)熱 4分鐘后,將 ,并將活塞推到校準(zhǔn)的標(biāo)記位置( 6分鐘) ? Cut extrudate start timer. At end of time period, cut extrudate ? 切斷熔體的擠出條,按動秒表計時,在定時周期結(jié)束時,再次切斷熔體的擠出條 Mfr continued 熔體流動速率( MFR)(續(xù)) ? Mfr (gms/10 minutes) = weight of extrudate / time interval ? MFR(克/ 10分鐘)= 擠出條的重量/時間間隔 ? Generally an automated process ? 通常是一個自動進行的測試過程 ? Customers often have only 1 plastometer。 may not agree with our lab ? 客戶通常只有一臺塑性計,有可能和我們實驗室儀器的型號不同 ? Tinius Olsen MP600 = ? 右圖為 Tinius Olsen MP600 型 ? Multiple extrusions / MFR testing measures additive package effectiveness ? 多次擠出/熔體