Abstract
The properties of semicrystalline polymeric materials depend remarkably on their structures, especially for those exhibiting a polymorphic behavior. This offers an efficient way to tailor their properties through crystal engineering. For control of the crystal structure, and therefore the physical and mechanical properties, a full understanding of the polymorph selection of polymers under varied conditions is essential. This has stimulated a mass of research work on the polymorphic crystallization and related phase transformation. Considering that the isotactic poly(1-butene) (iPBu) exhibits pronounced polymorphs and complicated transition between different phases, the study on its crystallization and phase transformation has attracted considerable attention during the past decades. This review provides the context of the recent progresses made on the crystallization and phase transition behavior of iPBu. We first review the crystal structures of known crystal forms and then their formation conditions and influencing factors. In addition, the inevitable form II to form I spontaneous transition mechanism and the transformation kinetics is reviewed based on the existing research works, aiming for it to be useful for its processing in different phases and the further technical development of new methods for accelerating or even bypass its form II to form I transformation.
Highlights
IPBu is a polymer with pronounced polymorph and complicated phase transition behavior
Form I isotactic poly(1-butene) (iPBu) is hardly produced since it goes from melt quickly into its kinetically favored metastable form II
Even though the solid-phase transition endows the aforementioned high-performance of the material, it limits considerably the applications of iPBu since the transformation results in volume shrinkage and shape deformation of the products due to the difference structures of forms II and I
Summary
Polymorphism of polymers, namely crystallization of a given polymer into different crystal structures, is aubiquitous phenomenon in material science [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19]. There always exists a thermodynamically most stable phase among different modifications, such as form I of iPBu. is well known, the stability various for a given polymer is different. The difference in stability of the possibility of phase the formation and transformation mechanisms of different differentcrystals crystaloffers modifications is of great transition between them via suitable treatment. Taking all these into account, an understanding of the importance for a purposeful structural control of the semicrystalline polymers. After a brief description of the ofcrystal structures related to different been undertaken towards an understanding of the formation and transformation mechanisms of iPBu modifications, we focus mainly on the regulation of the crystal modification and the pathway for related materials. Related phase transition of it rather than summarizing all of the work to date on this issue
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
