Isotactic polybutene-1 exhibits excellent physical, mechanical and chemical properties dependent on its most important polymorphic crystal forms, called forms I, II and III. The most stable form, form I, is generated via a slow, solid-state transformation of the tetragonal, kinetically favored form II. The slow transformation rate of form II to I, accompanied by sample shrinkage, attains its maximum at ca 25 °C and takes 7–10 days, which is a technical problem for iPB-1 practical applications. We describe here the results reported in the literature by the authors and others of the effect of various physical factors that affect the transformation rate, with the goal of determining means of accelerating it; it is noted explanations of the effects are limited and in many cases, not given.

等规聚丁烯-1表现出优异的物理，机械和化学性质，这取决于其最重要的多晶型形式，即形式I，II和III。最稳定的形式I是通过对动力学有利的四方形II进行缓慢的固态转化而生成的。II型到I型的缓慢转化速率，伴随样品的收缩，在约25°C时达到最大值，需要7-10天，这是iPB-1实际应用中的一个技术问题。我们在这里描述作者和其他人在文献中报道的影响转化率的各种物理因素的影响的结果，目的是确定加速转化的方法。注意，对效果的解释是有限的，并且在许多情况下没有给出。