Extremely slow phase transition from form II to form I has been the greatest bottleneck of isotactic polybutene-1 preventing from its extensive applications. In the past decade, although various methods were proposed, the acceleration for the phase transition was limited. High pressure seems to be a potential approach but is regarded impractical, because earlier studies claimed that to accelerate phase transition the pressure needed to be over 90 MPa, which was too high for real processing. The pressure could be overestimated because of higher phase transition temperature employed, therefore, it is necessary to investigate the pressure-induced phase transition again. Surprisingly, it is found that at room temperature, the pressure inducing fast phase transition actually does not need such high. As low as 0.7 MPa, the acceleration effect appears. At 2 MPa or higher, phase transition can be completed within 5 min. This means that form II totally can transform to form I in real processing process only if applying a slightly higher pressure. This study provides a simple and effective method to settle such a long-standing problem persecuting the academic world and the industrial world for polybutene-1.

从形式II到形式I的极慢的相变一直是等规聚丁烯-1的最大瓶颈，阻止了其广泛应用。在过去的十年中，尽管提出了各种方法，但是相变的加速是有限的。高压似乎是一种潜在的方法，但被认为是不切实际的，因为较早的研究声称，为了加速相变，压力需要超过90 MPa，这对于实际加工而言太高了。由于采用较高的相变温度，可能会高估压力，因此，有必要再次研究压力引起的相变。令人惊讶地发现，在室温下，引起快速相变的压力实际上不需要那么高。低至0.7 MPa，就会出现加速效果。在2 MPa或更高的压力下，相变可在5分钟内完成。这意味着，只有施加稍高的压力，形式II才能在实际处理过程中完全转换为形式I。该研究提供了一种简单有效的方法来解决这一长期困扰聚丁烯-1的学术界和工业界的问题。