CTP的配用量和加工溫(wen)度的可預見性

　　只要(yao)(yao)配(pei)用(yong)(yong)防(fang)焦劑(ji)(ji)CTP，可以根據橡(xiang)膠(jiao)制品需(xu)(xu)要(yao)(yao)設計不同(tong)加(jia)(jia)(jia)工(gong)溫(wen)(wen)(wen)度(du)(du)，這被稱為(wei)CTP配(pei)用(yong)(yong)量(liang)(liang)(liang)(liang)和(he)加(jia)(jia)(jia)工(gong)溫(wen)(wen)(wen)度(du)(du)的(de)(de)(de)可預(yu)見(jian)性(xing)(xing)(xing)。與三種(zhong)不同(tong)次(ci)磺酰(xian)胺促進劑(ji)(ji)(NOBS、NS、CZ)配(pei)用(yong)(yong)時，其(qi)(qi)(qi)用(yong)(yong)量(liang)(liang)(liang)(liang)與門尼焦燒值均(jun)成線(xian)(xian)(xian)性(xing)(xing)(xing)關系(xi)。因(yin)此利用(yong)(yong)這種(zhong)線(xian)(xian)(xian)性(xing)(xing)(xing)函數關系(xi)，想要(yao)(yao)從(cong)既定的(de)(de)(de)加(jia)(jia)(jia)工(gong)安(an)(an)全(quan)(quan)(quan)性(xing)(xing)(xing)提高到(dao)(dao)另一(yi)(yi)(yi)個安(an)(an)全(quan)(quan)(quan)性(xing)(xing)(xing)，只要(yao)(yao)確定配(pei)用(yong)(yong)所需(xu)(xu)的(de)(de)(de)CTP的(de)(de)(de)準確用(yong)(yong)量(liang)(liang)(liang)(liang)即可。此外還可以預(yu)見(jian)Z佳加(jia)(jia)(jia)工(gong)溫(wen)(wen)(wen)度(du)(du)和(he)安(an)(an)全(quan)(quan)(quan)性(xing)(xing)(xing)。圖4-5表明加(jia)(jia)(jia)工(gong)溫(wen)(wen)(wen)度(du)(du)和(he)CTP在(zai)配(pei)方(fang)中(zhong)(zhong)的(de)(de)(de)效(xiao)應。因(yin)為(wei)CTP不像其(qi)(qi)(qi)他防(fang)焦劑(ji)(ji)，它在(zai)正常加(jia)(jia)(jia)工(gong)過程中(zhong)(zhong)和(he)硫(liu)化(hua)溫(wen)(wen)(wen)度(du)(du)內，不會發生分解，利用(yong)(yong)其(qi)(qi)(qi)防(fang)焦效(xiao)能中(zhong)(zhong)分子結構的(de)(de)(de)不變(bian)性(xing)(xing)(xing)及其(qi)(qi)(qi)線(xian)(xian)(xian)性(xing)(xing)(xing)關系(xi)，可以做(zuo)到(dao)(dao)其(qi)(qi)(qi)用(yong)(yong)量(liang)(liang)(liang)(liang)對加(jia)(jia)(jia)工(gong)溫(wen)(wen)(wen)度(du)(du)及安(an)(an)全(quan)(quan)(quan)性(xing)(xing)(xing)的(de)(de)(de)依從(cong)性(xing)(xing)(xing)的(de)(de)(de)預(yu)測。圖4-5中(zhong)(zhong)實線(xian)(xian)(xian)代表丁(ding)苯膠(jiao)料中(zhong)(zhong)未(wei)加(jia)(jia)(jia)CTP，虛線(xian)(xian)(xian)代表加(jia)(jia)(jia)0.25份CTP。從(cong)實線(xian)(xian)(xian)A點(橫坐標(biao)135℃，縱坐標(biao)10mim)，其(qi)(qi)(qi)加(jia)(jia)(jia)工(gong)安(an)(an)全(quan)(quan)(quan)值(T2)約(yue)20mim。因(yin)此，在(zai)同(tong)一(yi)(yi)(yi)另工(gong)溫(wen)(wen)(wen)度(du)(du)時，配(pei)方(fang)中(zhong)(zhong)含有CTP的(de)(de)(de)安(an)(an)全(quan)(quan)(quan)性(xing)(xing)(xing)增加(jia)(jia)(jia)了(le)一(yi)(yi)(yi)倍。同(tong)樣，如果要(yao)(yao)保持一(yi)(yi)(yi)定的(de)(de)(de)加(jia)(jia)(jia)工(gong)安(an)(an)全(quan)(quan)(quan)值(T2=10mim)增加(jia)(jia)(jia)產量(liang)(liang)(liang)(liang)，那就(jiu)可以從(cong)A點劃一(yi)(yi)(yi)平(ping)行線(xian)(xian)(xian)與虛線(xian)(xian)(xian)交于C點，相當(dang)于145℃，即是說，可經(jing)將加(jia)(jia)(jia)工(gong)溫(wen)(wen)(wen)度(du)(du)從(cong)135℃提高到(dao)(dao)145℃時具有同(tong)樣的(de)(de)(de)安(an)(an)全(quan)(quan)(quan)性(xing)(xing)(xing)，但產量(liang)(liang)(liang)(liang)可以增加(jia)(jia)(jia)。

　　一(yi)般說來，橡(xiang)膠(jiao)加工的(de)(de)(de)(de)安(an)全性(xing)(xing)與(yu)CTP用(yong)(yong)(yong)量(liang)(liang)成線(xian)性(xing)(xing)關(guan)(guan)系(xi)，其直線(xian)的(de)(de)(de)(de)斜(xie)率位置(zhi)取決于配方中(zhong)的(de)(de)(de)(de)成分，如彈(dan)性(xing)(xing)體種類(lei)(lei)、促(cu)進(jin)劑(ji)(ji)、硫(liu)化(hua)(hua)(hua)(hua)劑(ji)(ji)、填充劑(ji)(ji)的(de)(de)(de)(de)類(lei)(lei)型和(he)用(yong)(yong)(yong)量(liang)(liang)等。CTP可以(yi)適(shi)用(yong)(yong)(yong)于所有(you)可用(yong)(yong)(yong)硫(liu)磺(huang)(huang)硫(liu)化(hua)(hua)(hua)(hua)的(de)(de)(de)(de)橡(xiang)膠(jiao)和(he)幾乎所有(you)促(cu)進(jin)劑(ji)(ji)。但是，對(dui)(dui)(dui)于配用(yong)(yong)(yong)過氧(yang)化(hua)(hua)(hua)(hua)物(wu)、樹脂或(huo)(huo)金屬(shu)氧(yang)化(hua)(hua)(hua)(hua)物(wu)的(de)(de)(de)(de)硫(liu)化(hua)(hua)(hua)(hua)體系(xi)無效(xiao)(xiao)，而且(qie)一(yi)般不(bu)(bu)用(yong)(yong)(yong)于膠(jiao)乳配方中(zhong)。CTP對(dui)(dui)(dui)次磺(huang)(huang)酰胺/硫(liu)磺(huang)(huang)硫(liu)化(hua)(hua)(hua)(hua)體系(xi)防(fang)焦(jiao)(jiao)劑(ji)(ji)效(xiao)(xiao)用(yong)(yong)(yong)Z佳(jia)，其效(xiao)(xiao)果(guo)次序如下：天(tian)然橡(xiang)膠(jiao)>丁(ding)腈橡(xiang)膠(jiao)>乙丙橡(xiang)膠(jiao)>丁(ding)基橡(xiang)膠(jiao)>氯丁(ding)橡(xiang)膠(jiao)。防(fang)焦(jiao)(jiao)劑(ji)(ji)CTP在含秋(qiu)蘭姆類(lei)(lei)、硫(liu)代氨基甲酸類(lei)(lei)促(cu)進(jin)劑(ji)(ji)的(de)(de)(de)(de)硫(liu)化(hua)(hua)(hua)(hua)體系(xi)中(zhong)，效(xiao)(xiao)用(yong)(yong)(yong)較低(di)。CTP的(de)(de)(de)(de)防(fang)焦(jiao)(jiao)效(xiao)(xiao)果(guo)與(yu)硫(liu)黃用(yong)(yong)(yong)關(guan)(guan)系(xi)密切(qie)，通常用(yong)(yong)(yong)量(liang)(liang)1.5—3.0份時Z佳(jia)。CTP用(yong)(yong)(yong)量(liang)(liang)通常為(wei)(wei)0.1—0.45份范圍內(nei)，對(dui)(dui)(dui)硫(liu)化(hua)(hua)(hua)(hua)膠(jiao)的(de)(de)(de)(de)模量(liang)(liang)、彈(dan)性(xing)(xing)、蠕變(bian)、永久變(bian)形(xing)、熱量(liang)(liang)貯存(cun)、磨耗、抗油溶(rong)脹等性(xing)(xing)能均無影響，對(dui)(dui)(dui)橡(xiang)膠(jiao)與(yu)化(hua)(hua)(hua)(hua)纖織物(wu)或(huo)(huo)鋼絲黏合也無不(bu)(bu)良影響。如果(guo)用(yong)(yong)(yong)量(liang)(liang)超過0.45份時，要注意硫(liu)化(hua)(hua)(hua)(hua)后的(de)(de)(de)(de)模量(liang)(liang)，可能略有(you)下降，并對(dui)(dui)(dui)壓縮變(bian)形(xing)、生熱、彈(dan)性(xing)(xing)、蠕變(bian)也有(you)一(yi)定影響。發(fa)生這(zhe)種問題后的(de)(de)(de)(de)補救辦法(fa)是稍許增(zeng)加硫(liu)磺(huang)(huang)用(yong)(yong)(yong)量(liang)(liang)(增(zeng)加量(liang)(liang)為(wei)(wei)CTP用(yong)(yong)(yong)量(liang)(liang)的(de)(de)(de)(de)40%)或(huo)(huo)增(zeng)加促(cu)進(jin)劑(ji)(ji)用(yong)(yong)(yong)量(liang)(liang)(增(zeng)加量(liang)(liang)為(wei)(wei)CTP用(yong)(yong)(yong)量(liang)(liang)的(de)(de)(de)(de)20%),這(zhe)樣可以(yi)使模量(liang)(liang)得到調整。本品(pin)使的(de)(de)(de)(de)色(se)制品(pin)輕微(wei)變(bian)色(se)，不(bu)(bu)適(shi)用(yong)(yong)(yong)于的(de)(de)(de)(de)色(se)或(huo)(huo)淺色(se)制品(pin)。有(you)低(di)毒，避(bi)免用(yong)(yong)(yong)于與(yu)食(shi)物(wu)接觸的(de)(de)(de)(de)制品(pin)。