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滑石粉在塑料改性中的那些應用

發布(bu)時間:2020-11-02

瀏覽次數:1747

一、滑石粉在聚丙烯樹脂中的應用(PP)

滑(hua)石(shi)(shi)(shi)粉常(chang)用(yong)(yong)于(yu)填充聚(ju)(ju)(ju)丙(bing)烯(xi)(xi),滑(hua)石(shi)(shi)(shi)粉具有(you)薄(bo)片(pian)構型的(de)(de)(de)(de)片(pian)狀結(jie)構特(te)征,因此粒(li)度較細的(de)(de)(de)(de)滑(hua)石(shi)(shi)(shi)粉可用(yong)(yong)作聚(ju)(ju)(ju)丙(bing)烯(xi)(xi)的(de)(de)(de)(de)補(bu)強(qiang)填充劑。在(zai)(zai)聚(ju)(ju)(ju)丙(bing)烯(xi)(xi)的(de)(de)(de)(de)改性(xing)體(ti)系中(zhong)(zhong)(zhong),加入超(chao)細滑(hua)石(shi)(shi)(shi)粉不(bu)但能(neng)夠(gou)明顯(xian)(xian)的(de)(de)(de)(de)提(ti)(ti)高聚(ju)(ju)(ju)丙(bing)烯(xi)(xi)制品的(de)(de)(de)(de)剛性(xing)、表(biao)面(mian)硬度、耐(nai)熱(re)蠕(ru)變性(xing)、電(dian)絕緣性(xing)、尺寸穩(wen)定性(xing),還可以提(ti)(ti)高聚(ju)(ju)(ju)丙(bing)烯(xi)(xi)的(de)(de)(de)(de)沖擊強(qiang)度。在(zai)(zai)聚(ju)(ju)(ju)丙(bing)烯(xi)(xi)中(zhong)(zhong)(zhong)添加少量的(de)(de)(de)(de)滑(hua)石(shi)(shi)(shi)粉還能(neng)起到(dao)成核劑的(de)(de)(de)(de)作用(yong)(yong),提(ti)(ti)高聚(ju)(ju)(ju)丙(bing)烯(xi)(xi)的(de)(de)(de)(de)結(jie)晶(jing)性(xing),從而使聚(ju)(ju)(ju)丙(bing)烯(xi)(xi)各項機(ji)械性(xing)能(neng)提(ti)(ti)高,又由于(yu)提(ti)(ti)高結(jie)晶(jing)性(xing),細化晶(jing)粒(li),亦能(neng)提(ti)(ti)高聚(ju)(ju)(ju)丙(bing)烯(xi)(xi)的(de)(de)(de)(de)透明性(xing)。填充20%和40%超(chao)細目滑(hua)石(shi)(shi)(shi)粉的(de)(de)(de)(de)聚(ju)(ju)(ju)丙(bing)烯(xi)(xi)復(fu)合材料,不(bu)論是在(zai)(zai)室溫和高溫下,都能(neng)夠(gou)明顯(xian)(xian)提(ti)(ti)高聚(ju)(ju)(ju)丙(bing)烯(xi)(xi)的(de)(de)(de)(de)剛性(xing)和高溫下的(de)(de)(de)(de)耐(nai)蠕(ru)變性(xing)能(neng)。在(zai)(zai)汽(qi)車工(gong)(gong)業(ye)中(zhong)(zhong)(zhong),聚(ju)(ju)(ju)丙(bing)烯(xi)(xi)添加滑(hua)石(shi)(shi)(shi)粉主要用(yong)(yong)于(yu)汽(qi)車的(de)(de)(de)(de)保(bao)險杠和儀(yi)表(biao)盤,另外還用(yong)(yong)于(yu)風扇罩、加熱(re)器罩、導管、蓄電(dian)池防熱(re)板、流體(ti)泵件(jian)等;在(zai)(zai)飛機(ji)工(gong)(gong)業(ye)中(zhong)(zhong)(zhong),用(yong)(yong)于(yu)冰箱門(men)襯墊、加熱(re)器及真(zhen)空泵罩、洗滌機(ji)攪拌器;在(zai)(zai)電(dian)氣工(gong)(gong)業(ye)中(zhong)(zhong)(zhong),用(yong)(yong)于(yu)注(zhu)(zhu)塑成型各種儀(yi)表(biao)殼(ke)體(ti)和電(dian)氣元件(jian),在(zai)(zai)家(jia)電(dian)工(gong)(gong)業(ye)中(zhong)(zhong)(zhong),用(yong)(yong)于(yu)冰箱抽屜、洗衣機(ji)滾(gun)筒(tong)等注(zhu)(zhu)塑件(jian)。



二、滑石粉在聚乙烯樹脂中的應用(PE)

滑(hua)(hua)石(shi)是天然硅酸(suan)(suan)鎂,它獨特的(de)微鱗(lin)片(pian)狀結構(gou),具有(you)一定的(de)抗水(shui)性(xing)(xing)和高(gao)(gao)度的(de)化(hua)學惰性(xing)(xing),因此(ci)有(you)良好(hao)的(de)耐化(hua)學腐(fu)蝕性(xing)(xing)和滑(hua)(hua)動性(xing)(xing)。用它填充聚(ju)乙(yi)(yi)烯(xi)可作為工程塑(su)(su)料(liao)(liao),有(you)良好(hao)的(de)耐化(hua)學腐(fu)蝕性(xing)(xing)和流動性(xing)(xing),可與ABS、尼(ni)龍、聚(ju)碳酸(suan)(suan)脂競爭。用它填充聚(ju)乙(yi)(yi)烯(xi)能(neng)夠提高(gao)(gao)以下性(xing)(xing)能(neng):韌度、撓曲模量(liang)和扭曲模量(liang);提高(gao)(gao)撓曲強(qiang)度;降(jiang)低在常溫(wen)和高(gao)(gao)溫(wen)下下蠕變(bian)傾向;提高(gao)(gao)熱(re)(re)變(bian)溫(wen)度及(ji)尺寸穩定性(xing)(xing);改善變(bian)形和翹(qiao)曲,同時亦有(you)較低的(de)熱(re)(re)膨脹系數;改進導熱(re)(re)性(xing)(xing);提高(gao)(gao)模塑(su)(su)件的(de)表(biao)面硬度及(ji)光潔度;提高(gao)(gao)聚(ju)乙(yi)(yi)烯(xi)的(de)機械強(qiang)度。添(tian)加不同比例(li)的(de)滑(hua)(hua)石(shi)粉對聚(ju)乙(yi)(yi)烯(xi)材料(liao)(liao)的(de)物性(xing)(xing)將產生(sheng)不同的(de)影響,添(tian)加比例(li)在10-15%達到(dao)。對于聚(ju)乙(yi)(yi)烯(xi)吹塑(su)(su)薄(bo)(bo)膜來說,填充超細滑(hua)(hua)石(shi)粉母(mu)料(liao)(liao)比其他填料(liao)(liao)好(hao),易(yi)成型、工藝(yi)性(xing)(xing)好(hao)。而且,該種(zhong)薄(bo)(bo)膜可使氧(yang)氣透過率降(jiang)低80%,特別(bie)適(shi)(shi)合包裝含(han)油食品,如花生(sheng)米(mi)、蠶豆等,長期(qi)保持不出(chu)油、不變(bian)質:該種(zhong)薄(bo)(bo)膜可使水(shui)蒸氣透過率降(jiang)70%,具有(you)很(hen)好(hao)的(de)防潮(chao)(chao)性(xing)(xing),很(hen)適(shi)(shi)合作地下土工防潮(chao)(chao)布(bu),也適(shi)(shi)用于包裝食品。


三、滑石粉在ABS樹脂中的應用

ABS樹脂(zhi)是無(wu)(wu)定(ding)(ding)形聚合物,具有聚苯乙(yi)烯那樣優良(liang)的(de)(de)(de)成型(xing)加工性(xing);它具有良(liang)好的(de)(de)(de)抗沖(chong)擊強(qiang)度(du),耐(nai)(nai)低溫性(xing)能(neng)(neng)(neng)好,拉伸強(qiang)度(du)高耐(nai)(nai)蠕變(bian)性(xing)能(neng)(neng)(neng)好。為了提升ABS現有的(de)(de)(de)使用(yong)性(xing)能(neng)(neng)(neng),人們對ABS改性(xing)的(de)(de)(de)研究普(pu)(pu)遍的(de)(de)(de)開展。比(bi)(bi)如(ru)ABS與(yu)PVC共(gong)(gong)混制(zhi)造的(de)(de)(de)汽車(che)儀(yi)板吸塑片(pian)、ABS與(yu)PVC共(gong)(gong)混制(zhi)造的(de)(de)(de)仿皮(pi)箱包(bao)蒙面(mian)(mian)皮(pi),不(bu)但強(qiang)度(du)高、韌性(xing)大而且能(neng)(neng)(neng)夠(gou)保持表面(mian)(mian)花紋的(de)(de)(de)耐(nai)(nai)久性(xing)。這種共(gong)(gong)混材(cai)料加超(chao)細碳酸(suan)鈣或超(chao)細滑石(shi)粉(fen)進行填充,能(neng)(neng)(neng)夠(gou)顯(xian)著(zhu)的(de)(de)(de)提高共(gong)(gong)混材(cai)料的(de)(de)(de)缺口沖(chong)擊強(qiang)度(du)和(he)耐(nai)(nai)撕裂強(qiang)度(du),比(bi)(bi)如(ru):添(tian)加超(chao)細滑石(shi)粉(fen)或碳酸(suan)鈣5-15%,缺口沖(chong)擊強(qiang)度(du)可提高2-4倍。由于ABS是無(wu)(wu)定(ding)(ding)型(xing)聚合物具有容納較(jiao)多(duo)填料的(de)(de)(de)功能(neng)(neng)(neng)。其(qi)中添(tian)加超(chao)細滑石(shi)粉(fen)既能(neng)(neng)(neng)顯(xian)著(zhu)地提高ABS原存的(de)(de)(de)性(xing)能(neng)(neng)(neng),又能(neng)(neng)(neng)降低成本。因(yin)而多(duo)用(yong)它注(zhu)塑成型(xing)各種儀(yi)表、電(dian)視機(ji)、收(shou)錄(lu)機(ji)、手機(ji)等的(de)(de)(de)殼體,當然在其(qi)他(ta)領域如(ru):紡(fang)織器材(cai)、電(dian)氣零(ling)件、汽車(che)部件、飛(fei)機(ji)部件等的(de)(de)(de)應用(yong)也(ye)非常普(pu)(pu)遍。


四、滑石粉在聚苯乙烯樹脂中的應用(PS)

未改性(xing)(xing)的(de)通用級聚(ju)苯乙烯(xi)是無定形(xing)聚(ju)合物(wu),它硬而脆,但(dan)它具(ju)有良好的(de)電性(xing)(xing)能、耐老化性(xing)(xing)能和高(gao)的(de)尺(chi)寸穩(wen)定性(xing)(xing),缺點是脆性(xing)(xing)高(gao),對環境應力開裂敏感。添加超細滑(hua)石(shi)粉能夠提高(gao)沖擊(ji)韌性(xing)(xing),調節流變性(xing)(xing),擾曲(qu)模(mo)量顯著提高(gao),抗張屈服強度(du)也有提高(gao)。例如:添加40%超細滑(hua)石(shi)粉或(huo)滑(hua)石(shi)粉母(mu)料,擾曲(qu)模(mo)量從23800kg/cm2增(zeng)加到58800kg/cm2,抗張度(du)從336kg/cm2提高(gao)到385kg/cm2。


五、滑石粉(fen)在尼龍樹脂中的應用(PA)

對尼(ni)龍(long)(聚(ju)酰胺),在工業上特(te)別注意(yi)利用這種(zhong)塑料的韌性(xing)(xing)(xing)(xing)(xing)和(he)耐(nai)磨性(xing)(xing)(xing)(xing)(xing)。尼(ni)龍(long)一(yi)般是(shi)硬的,類似(si)角質,具(ju)有(you)(you)(you)良好的耐(nai)磨性(xing)(xing)(xing)(xing)(xing)和(he)高的尺寸穩(wen)定性(xing)(xing)(xing)(xing)(xing)。這些(xie)性(xing)(xing)(xing)(xing)(xing)能(neng)都可以(yi)通過填(tian)充劑或增強劑加(jia)以(yi)進(jin)一(yi)步提(ti)高。PA66的硬度(du)(du)(du)(du)、勁度(du)(du)(du)(du)、耐(nai)磨性(xing)(xing)(xing)(xing)(xing)和(he)熱(re)變(bian)形(xing)(xing)溫度(du)(du)(du)(du)在尼(ni)龍(long)里是(shi)的;PA6以(yi)其較(jiao)高的韌性(xing)(xing)(xing)(xing)(xing)著稱;PA610吸(xi)水性(xing)(xing)(xing)(xing)(xing)較(jiao)低,從而尺寸穩(wen)定性(xing)(xing)(xing)(xing)(xing)也較(jiao)高;PA11沖擊強度(du)(du)(du)(du)在尼(ni)龍(long)里。在各種(zhong)填(tian)料中(zhong),層狀結(jie)構的滑石(shi)粉能(neng)提(ti)高尼(ni)龍(long)原有(you)(you)(you)的好性(xing)(xing)(xing)(xing)(xing)能(neng),并改(gai)進(jin)耐(nai)磨性(xing)(xing)(xing)(xing)(xing)。與金屬相比未(wei)填(tian)充改(gai)性(xing)(xing)(xing)(xing)(xing)尼(ni)龍(long)彈性(xing)(xing)(xing)(xing)(xing)模量低,拉伸(shen)和(he)蠕變(bian)強度(du)(du)(du)(du)低,力(li)學性(xing)(xing)(xing)(xing)(xing)能(neng)與溫度(du)(du)(du)(du)有(you)(you)(you)明顯的依賴關系,分子上含有(you)(you)(you)吸(xi)水基因(yin)胺基,吸(xi)水率(lv)高,制品在使(shi)用時易吸(xi)水膨(peng)脹(zhang)變(bian)形(xing)(xing),加(jia)工成型時冷卻快結(jie)晶(jing)不完全(quan),在使(shi)用時還在結(jie)晶(jing),這就導致制品變(bian)形(xing)(xing),甚至開裂。尼(ni)龍(long)的上述(shu)缺點,添(tian)加(jia)超細滑石(shi)粉能(neng)夠(gou)有(you)(you)(you)很(hen)大的改(gai)善,滑石(shi)粉有(you)(you)(you)成核劑的作用,添(tian)加(jia)后能(neng)夠(gou)提(ti)高尼(ni)龍(long)的結(jie)晶(jing)速率(lv),增大結(jie)晶(jing)度(du)(du)(du)(du),因(yin)此特(te)別能(neng)夠(gou)提(ti)高尼(ni)龍(long)的韌度(du)(du)(du)(du)、機械(xie)強度(du)(du)(du)(du)、硬度(du)(du)(du)(du)、熱(re)穩(wen)定性(xing)(xing)(xing)(xing)(xing)、尺寸穩(wen)定性(xing)(xing)(xing)(xing)(xing),改(gai)進(jin)制品表(biao)面(mian)質量和(he)變(bian)形(xing)(xing)行為(wei),對于(yu)吸(xi)潮(chao)性(xing)(xing)(xing)(xing)(xing)、電性(xing)(xing)(xing)(xing)(xing)能(neng)和(he)化學性(xing)(xing)(xing)(xing)(xing)能(neng)也有(you)(you)(you)好的影響。


六、滑(hua)石粉(fen)在聚氯乙烯樹脂中的應用(PVC)

用(yong)普通粉(fen)(fen)體(ti)填(tian)充聚(ju)(ju)氯(lv)乙(yi)烯已經非常(chang)普遍地在使用(yong),如(ru)制造(zao)硬聚(ju)(ju)氯(lv)乙(yi)烯管材(cai),填(tian)充碳酸鈣(gai)量(liang)(liang)可(ke)以(yi)達到40%,但是聚(ju)(ju)氯(lv)乙(yi)烯的抗張強(qiang)(qiang)(qiang)(qiang)度(du)(du)和沖擊(ji)強(qiang)(qiang)(qiang)(qiang)度(du)(du)都要降(jiang)低;如(ru)果添(tian)加(jia)(jia)平均顆(ke)粒在5微米即2000目的滑石粉(fen)(fen),添(tian)加(jia)(jia)到40-45%體(ti)積份(fen)數時(shi),可(ke)以(yi)發現(xian)材(cai)料的屈服強(qiang)(qiang)(qiang)(qiang)度(du)(du)甚(shen)至(zhi)高于(yu)(yu)原來的斷裂強(qiang)(qiang)(qiang)(qiang)度(du)(du),對(dui)(dui)(dui)聚(ju)(ju)氯(lv)乙(yi)烯體(ti)系(xi)有明顯(xian)的增強(qiang)(qiang)(qiang)(qiang)作用(yong)。對(dui)(dui)(dui)于(yu)(yu)沖擊(ji)強(qiang)(qiang)(qiang)(qiang)度(du)(du),添(tian)加(jia)(jia)超細滑石粉(fen)(fen),無缺口沖擊(ji)強(qiang)(qiang)(qiang)(qiang)度(du)(du)在15%重(zhong)量(liang)(liang)份(fen)內(nei)基(ji)本上不降(jiang)低,缺口沖擊(ji)強(qiang)(qiang)(qiang)(qiang)度(du)(du)有所(suo)降(jiang)低,對(dui)(dui)(dui)于(yu)(yu)擾(rao)曲模量(liang)(liang),能夠顯(xian)著(zhu)增加(jia)(jia)。超細粉(fen)(fen)體(ti)對(dui)(dui)(dui)于(yu)(yu)添(tian)加(jia)(jia)增韌性劑的聚(ju)(ju)氯(lv)乙(yi)烯體(ti)系(xi),如(ru)PVC/CPE、PVC/ABS體(ti)系(xi),則(ze)具(ju)有十(shi)分顯(xian)著(zhu)的補(bu)強(qiang)(qiang)(qiang)(qiang)作用(yong)。