二哌啶乙烷的合成及其在合成聚丁二烯中的应用

合成了二哌啶乙烷（ＤＰＥ），并进行了分析与鉴定。采用ＤＰＥ做丁二烯阴离子聚合的调节剂，考察了ＤＰＥ／ｎ－ＢｕＬｉ（正丁基锂）和ＤＰＥ／α－ＭＮＬｉ（α－甲基萘锂）比值对形成１，２－聚丁二烯（１，２－ＰＢ）微观结构调节规律，得到了１，２－结构近１００％的聚丁二烯。采用高分子设计方法，通过引入ＤＰＥ合成了１，４－１，２两嵌段和１，２－１，４－１，２三嵌段聚丁二烯，ＤＳＣ－ＤＴＡ示差扫描量热计测示表明：聚丁二烯的１，２－结构含量影响其玻璃化转变温度（Ｔｇ），一定嵌段比的聚丁二烯可以产生微观相分离

Synthesis of Dipiperidinoethane and Its Application to Synthesizing Polybutadiene

Dipiperidinoethane (DPE) was synthesized and used as regulator in butadiene anionic polymerization to obtain polybutadiene (PB) with special structure The effect of the ratio such as DPE to n BuLi and DPE to α MNLi (α methylnaphthalenelithium) on the microstructure of 1,2 PB was studied PB with 100 percent 1,2 structure content was derived by adding DPE 1,2 1,4 diblock and 1,2 1,4 1,2 triblock PB were synthesized by applying the method of macromolecular design The results of DSC DTA show that the content of 1,2 structure can affect the glass transition temperature (T g) of PB, and microphase separation may appear when PB has a certain block ratio