相關標簽:廣州金發 PET、迪拜Equipolymers PET、沙伯基礎 PET塑料米、耐用性 PET、薄膜級 PET、尺寸穩定性良好 PET塑料米
化學改性
乙丙膠化學改性在乙丙膠中加入過氧化物或硫化物,用過氧化物為固化劑時,彈性體與塑化相都會受到不同程度的影響,過氧化物攻擊彈性體與聚合物,生成活性基團,導致更多的有效交聯,產生分子鏈段的纏結,纏結越大引起收縮越大。但過氧化物用量必須嚴格控制,過量會使交聯困難,整體沖擊強度下降。
三元乙丙膠的接枝反應由于三元乙丙膠不含極性基團,因此與極性聚合物的相容性很差,用高沸點低毒性的馬來酸二丁酯進行熔融接枝,在其烴鏈上接入極性基團,制得功能化的聚合物,改善了它與含極性基團聚合物的相容性,如在與尼龍的熔融接枝的熔融共混中,通過插在三元乙丙膠主動鏈上的羧基或酐基基團,與尼龍的端基組份進行反應,提高了結合力。
接枝反應
接枝馬來酸酐用馬來酸酐接枝氫化共聚物作為熔融混合相的相容劑。用熔融接枝的方法將馬來酸酐引入聚烯烴主體作為界面相容劑,馬來酸酐接枝量越高,共混物的力學性能越高。
接枝富馬酸酯用二2乙基已基富馬酸酯,在熔融狀態下,由過氧化物引發的自由基反應可以在聚合物上接枝富馬酸酯的單體,改善共混體中晶球尺寸。接枝甲基丙烯酸羥乙酯以過氧化物為引發劑,在熔融狀態下用甲基丙烯酸羥乙酯接枝聚合物,但要注意控制過氧化物的用量。
接枝甲基丙烯酸縮水甘油酯甲基丙烯酸縮水甘油酯(GMA)之中的環氧基團反應活性高,用其接枝聚合物所得產物可作為聚合物合金體系的優良相容劑。將聚合物、甲基丙烯酸縮水甘油酯及過氧化二異丙苯預先均勻混合,再經熔融擠出造粒接枝。接枝率不隨過氧化物的增加而增加,相反隨過氧化物的增加會下降。在接枝反應中,加入的苯乙烯基大分子自由基與聚合物的反應要比GMA高。苯乙烯優先接枝到聚合物上形成更加穩定的苯乙烯基大分子自由基,之后GMA參與反應。GMA與苯乙烯基大分子自由基的反應遠大于GMA與聚合物的反應速率,因而可提高GMA的接枝率,消耗大量的聚合物的自由基,抑制聚合物的降解。在體系中加入分子中含少量未飽和雙鍵熱塑性彈性體(SEBS)或分子內含較多雙鍵亞油酸三甘油酯也能減少降解。
非熔融接枝法將聚合物與氯化苯、過氧化叔丁基氯化溶液、馬來酸酐、丙酮進行反應,反應物經大量丙酮清洗、過濾、干燥得到馬來酸酐的接枝物。
接枝丙烯酸用微氧化聚合物粉料與丙烯酸反應,制備聚丙烯酸接枝的聚合物,用此聚合物與高嶺土復合材料作增容劑時有效地改善了復合物的力學性能,而以甲苯為溶劑時,得到的由甲基丙烯酸接枝的聚合物接枝率可達20%。輻射接枝利用CO60輻射接枝源,將丙烯腈接枝到聚合物上,使用合適的溶劑可使接枝率達到40%以上。 。以上文獻若需轉載請備注出處:pbt塑料 //shanglikaiguan.cn/
其它 其它 其它 | |
易結晶阻燃性GF30% |
性能項目 | 試驗條件[狀態] | 測試方法 | 測試數據 | |
比重 | 23℃水中24Hr | ASTM D-792 | 1.59 | |
成形收縮率 | 23℃水中24Hr | 0.3/1.2 | % | |
吸水率 | 23℃水中24Hr | ASTM D-570 | 0.08 | % |
沖擊強度 | 缺口,1/8 | ASTM D-256 | 75 | J/M |
沖擊強度 | 無缺口,1/8 | ASTM D-256 | 640 | J/M |
拉伸強度 | ASTM D-638 | 142 | MPa | |
彎曲強度 | ASTM D-790 | 205 | MPa | |
塔伯磨耗 | CS-171kg | ASTM D-1044 | 22 | mg |
表面硬度 | ASTM D-785 | M90 | ||
拉伸率 | ASTM D-638 | 3.8 | % | |
磨擦系數 | 對鋼 | ASTM D-1894 | 0.12 | |
彎曲彈性率 | ASTM D-790 | 8.9 | GPa | |
絕緣強度 | 1mmt | ASTM D-149 | 38 | KV/mm |
介電常數 | 60HZ | ASTM D-150 | 3.8 | |
介電常數 | 1KHZ | ASTM D-150 | 3.8 | |
耐電弧性 | ASTM D-495 | 105 | Sec | |
介電損耗正切值 | 60HZ | ASTM D-150 | 0.043 | |
介電損耗正切值 | 1KHZ | ASTM D-150 | 0.022 | |
體積電阻 | ASTM D-257 | >10E16 | Ω.cm | |
線膨脹系數 | X10 | ASTM D-696 | 2.5 | cm/cm |
熔點 | 251 | ℃ | ||
熱變形溫度 | 0.45MPa | ASTM D-648 | 240 | ℃ |
熱變形溫度 | 1.82MPa | ASTM D-648 | 235 | ℃ |
耐燃性 | UL 94 | HB |
利(li)(li)(li)洋(yang)節(jie)(jie)(jie)(jie)(jie)能(neng)(neng)(neng)(neng)有(you)限公(gong)(gong)(gong)(gong)(gong)司(si)(si) 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i)(ji)術.資(zi)(zi)金(jin).技(ji)(ji)(ji)(ji)改(gai)設(she)(she)(she)(she)備(bei)(bei)和負責(ze)施(shi)(shi)工(gong)(gong)(gong)(gong).用(yong)(yong)戶(hu)和公(gong)(gong)(gong)(gong)(gong)司(si)(si)雙方分享(xiang)(xiang)節(jie)(jie)(jie)(jie)(jie)能(neng)(neng)(neng)(neng)技(ji)(ji)(ji)(ji)改(gai)產(chan)(chan)生的(de)(de)(de)(de)(de)(de)節(jie)(jie)(jie)(jie)(jie)電(dian)(dian)收益(yi).用(yong)(yong)戶(hu)不(bu)需任(ren)何投資(zi)(zi).不(bu)承擔任(ren)何風(feng)險.即(ji)可享(xiang)(xiang)受(shou)節(jie)(jie)(jie)(jie)(jie)電(dian)(dian)收益(yi).科(ke)技(ji)(ji)(ji)(ji)節(jie)(jie)(jie)(jie)(jie)能(neng)(neng)(neng)(neng).合(he)作共贏(ying).是(shi)公(gong)(gong)(gong)(gong)(gong)司(si)(si)的(de)(de)(de)(de)(de)(de)服(fu)(fu)(fu)務宗旨.公(gong)(gong)(gong)(gong)(gong)司(si)(si)為(wei)國內幾百家(jia)企業(ye)(ye)(ye)提(ti)供(gong)(gong)了(le)節(jie)(jie)(jie)(jie)(jie)能(neng)(neng)(neng)(neng)技(ji)(ji)(ji)(ji)改(gai)服(fu)(fu)(fu)務.中(zhong)(zhong)央空(kong)(kong)調(diao)循環(huan)水系(xi)(xi)統平均節(jie)(jie)(jie)(jie)(jie)電(dian)(dian)率50%以(yi)上.廠礦(kuang)工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)循環(huan)水系(xi)(xi)統平均節(jie)(jie)(jie)(jie)(jie)電(dian)(dian)率40%以(yi)上.節(jie)(jie)(jie)(jie)(jie)能(neng)(neng)(neng)(neng)效(xiao)(xiao)(xiao)果顯著.取得了(le)良好的(de)(de)(de)(de)(de)(de)社(she)會(hui)效(xiao)(xiao)(xiao)益(yi)和經濟效(xiao)(xiao)(xiao)益(yi)