【正文】 ............................................................................................................... 14 乳液聚合 ........................................................................................................................... 14 微懸浮聚合 ....................................................................................................................... 14 四種主要聚合工藝的特性比較 ........................................................................................... 14 工藝方案選擇依據(jù) ........................................................................................................... 16 工藝流程方面 ................................................................................................................. 16 反應(yīng)速率控制方面 .......................................................................................................... 16 經(jīng)濟(jì)方面 ........................................................................................................................ 16 懸浮聚合優(yōu)點(diǎn) ................................................................................................................. 16 聚氯乙烯懸浮聚合工藝流程 ： ......................................................................................... 16 聚合原理 ........................................................................................................................ 16 鏈引發(fā) ............................................................................................................................ 16 鏈增長(zhǎng) ............................................................................................................................ 17 鏈轉(zhuǎn)移 ............................................................................................................................ 18 向單體 VC 鏈轉(zhuǎn)移 —— 形成端基雙鍵 PVC ....................................................................... 18 向高聚物轉(zhuǎn)移 —— 形成支鏈或交聯(lián) PVC .......................................................................... 18 鏈終止 ............................................................................................................................ 18 對(duì)聚合度的影響 .............................................................................................................. 20 對(duì) (視 )比重和吸油量的影響 ............................................................................................. 20 原料中雜質(zhì)的影響 ........................................................................................................ 20 乙炔對(duì)聚合反應(yīng)的影響 ................................................................................................. 20 聚氯乙烯生產(chǎn)工藝（懸浮聚合）流程簡(jiǎn)述 ........................................................................... 21 聚氯乙烯生產(chǎn)工藝流程（懸浮聚合）操作步驟 ................................................................. 21 4 工藝計(jì)算 ................................................................................................................................... 22 生產(chǎn)規(guī)模 ........................................................................................................................... 22 生產(chǎn)時(shí)間 ........................................................................................................................... 22 聚氯乙烯配方 .................................................................................................................... 22 聚氯乙烯懸浮聚合操作周期 ............................................................................................... 22 湖南科技大學(xué)本科生畢業(yè)設(shè)計(jì)（論文） 3 相關(guān)技術(shù)指標(biāo) .................................................................................................................... 23 相關(guān)控制指標(biāo) .................................................................................................................... 23 工藝計(jì)算 ............................................................................................................................ 23 計(jì)算依 ........................................................................................................................... 23 低沸塔 ........................................................................................................................ 24 高沸塔 ............................................................................................................................ 26 聚合釜物料衡算 .............................................................................................................. 29 熱量衡算 ........................................................................................................................ 32 5 聚合釜的設(shè)計(jì) ............................................................................................................................ 34 生產(chǎn)周期或生產(chǎn)批數(shù) ......................................................................................................... 34 根據(jù)年產(chǎn)量確定每批進(jìn) 料量 ............................................................................................... 34 選擇反應(yīng)器裝料系數(shù) ......................................................................................................... 34 計(jì)算反應(yīng)器體積 ................................................................................................................ 35 聚合釜壁厚的計(jì)算 ............................................................................................................. 35 計(jì)算厚度 ..................................................................................................................... 35 校核水壓實(shí)驗(yàn)強(qiáng)度 ....................................................................................................... 36 夾套的設(shè)計(jì) ....................................................................................................................... 36 夾套直徑和高度的確定 ................................................................................................ 36 夾套的材料和壁厚 ....................................................................................................... 36 校核水壓實(shí)驗(yàn)強(qiáng)度： ..........................................................................