合成树脂及塑料
閤成樹脂及塑料
합성수지급소료
CHINA SYNTHETIC RESIN AND PLASTICS
2015年
1期
40-43
,共4页
等规聚丙烯%非均相齐格勒-纳塔催化剂%外给电子体%立构规整性
等規聚丙烯%非均相齊格勒-納塔催化劑%外給電子體%立構規整性
등규취병희%비균상제격륵-납탑최화제%외급전자체%립구규정성
isotactic polypropylene%heterogeneous Ziegler-Natta catalyst%external electron donor%stereoregularity
用工业非均相Ziegler-Natta催化剂通过实验室制备和工业生产获得等规聚丙烯(iPP),利用高温凝胶渗透色谱仪、差示扫描量热仪等对iPP进行分析表征。在聚合温度分别为60,70℃条件下,研究了H2、外给电子体环己基-甲基-二甲氧基硅烷(CHMMS)对iPP相对分子质量及其分布、立构规整性及结晶性能等的影响。结果表明:H2,CHMMS对iPP微观结构的影响与聚合温度有很大关系;在不加CHMMS、聚合温度为60℃时,加入H2使iPP全同立构五单元组序列结构含量从60.16%增至77.45%;H2和CHMMS通过影响丙烯分子的“头-头”或“头-尾”结合方式对iPP的微观立体缺陷分布有调整作用。
用工業非均相Ziegler-Natta催化劑通過實驗室製備和工業生產穫得等規聚丙烯(iPP),利用高溫凝膠滲透色譜儀、差示掃描量熱儀等對iPP進行分析錶徵。在聚閤溫度分彆為60,70℃條件下,研究瞭H2、外給電子體環己基-甲基-二甲氧基硅烷(CHMMS)對iPP相對分子質量及其分佈、立構規整性及結晶性能等的影響。結果錶明:H2,CHMMS對iPP微觀結構的影響與聚閤溫度有很大關繫;在不加CHMMS、聚閤溫度為60℃時,加入H2使iPP全同立構五單元組序列結構含量從60.16%增至77.45%;H2和CHMMS通過影響丙烯分子的“頭-頭”或“頭-尾”結閤方式對iPP的微觀立體缺陷分佈有調整作用。
용공업비균상Ziegler-Natta최화제통과실험실제비화공업생산획득등규취병희(iPP),이용고온응효삼투색보의、차시소묘량열의등대iPP진행분석표정。재취합온도분별위60,70℃조건하,연구료H2、외급전자체배기기-갑기-이갑양기규완(CHMMS)대iPP상대분자질량급기분포、립구규정성급결정성능등적영향。결과표명:H2,CHMMS대iPP미관결구적영향여취합온도유흔대관계;재불가CHMMS、취합온도위60℃시,가입H2사iPP전동립구오단원조서렬결구함량종60.16%증지77.45%;H2화CHMMS통과영향병희분자적“두-두”혹“두-미”결합방식대iPP적미관입체결함분포유조정작용。
Isotactic?polypropylene(iPP)?produced?with?an?industrial?heterogeneous?Ziegler-Natta?catalyst?in?lab?and?on?industrial?scale?was?characterized?by?high?temperature?gel?permeation?chromatography(GPC), differential?scanning?calorimetry(DSC),etc.?The?effects?of?hydrogen?and?external?electron?donor?cyclohexyl?methyl?dimethoxy?silane(CHMMS)?on?the?relative?molecular?mass?and?its?distribution,stereoregularity?and?crystallization?property?of?iPP?were?investigated?at?the?polymerization?temperature?of?60,70?℃.?The?results?show?that?the?influences?of?hydrogen?and?CHMMS?on?the?microstructure?of?iPP?depend?on?the?polymerization?temperature?greatly.?The?content?of?stereoregularity?pentad?sequence?structure?is?increased?from?60.16%?to?77.45%?by?adding?hydrogen?without?CHMMS?at?60?℃.?Hydrogen?and?CHMMS?regulate?the?three-dimensional?micro-defect?distribution?of?iPP?by?influencing?head-head?or?head-tail?combination?way?of?propylene?molecules.