Polyacetaldehyde may exist in atactic , syndiotactic and isotactic forms .

聚乙醛可以以无规，间同和全同形式存在。

Crosslinking polyethylene ( pe-x ) , atactic copolymerization propylene ( pp-r ) tubing and polybutene tubing ( pb tube ) , pipe fittings .

交联聚乙烯（pe-x）、无规共聚丙烯（pp-r）管材和聚丁烯管材（pb管）、管件。

Structure and dynamics of atactic polystyrene melts under single step-strain investigated by coarse-grained molecular dynamics simulation .

利用粗粒化分子动态模拟探讨聚苯乙烯於单一应变流下之结构与动态。