The effect of poly(4‐methyl‐1‐pentene) on the nonisothermal crystallization kinetics of polypropylene. Issue 5 (3rd July 2019)

• Record Type: Journal Article
• Authors: Furushima, Yoshitomo; Masuda, Akihiro; Kuroda, Taiki; Okada, Kazuma; Iwata, Naoko; Ohkura, Masatoshi; Yamaguchi, Masayuki
• Is Part Of: Polymer crystallization. Volume 2:Issue 5(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-07-03
• Subjects: fast scanning calorimetry -- nucleating agent -- poly(4‐methyl‐1‐pentene); Crystalline polymers -- Periodicals; Crystallization -- Periodicals; Polymers -- Periodicals; 668.9
• DOI: 10.1002/pcr2.10082
• Languages: English
• ISSNs: 2573-7619

Abstract

Abstract: The crystallization behavior during cooling from a melt was investigated for polypropylene (PP), poly(4‐methyl‐1‐pentene) (PMP), and their blends (PP 70 wt%). PMP did not affect the crystallization temperature of the α‐form of PP under the nonisothermal condition and vice versa. On the other hand, the existence of PMP tends to prevent the formation of the conformational disordered phase of PP at a cooling rate of 50‐100 K s –1 . Regarding the crystallinity of PP, there were no differences in the heat of fusion between PP and PP/PMP blends that were prepared with the same cooling rate from the melt. The existence of PMP does not affect the total crystallinity of PP that was prepared by continuous cooling from the melt. Comparing the crystallization rate during cooling, PMP is at least 100 times faster than PP. Abstract : The relation between crystallization peak temperature and cooling rate from the melt reveals that the observed crystallization temperatures of polypropylene (PP)/poly(4‐methyl‐1‐pentene) (PMP) blends are in good agreement with their homopolymers. PMP does not affect the crystallization temperature of thermodynamical stable α‐form of PP under the nonisothermic condition and vice versa. However, PMP tends to prevent the formation of conformational disordered phase at cooling rates ranging from 50 to 100 K s −1 .