Bulk crystallization of solution epoxidized trans-1,4-polyisoprene

✍ Scribed by Nadarajah Vasanthan; Joseph P. Corrigan; Arthur E. Woodward

• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 1012 KB
• Volume: 195
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1994.021950712

✦ Synopsis

Abstract

Copolymers of trans‐1,4‐polyisoprene containing 2,2 mol‐%, 5,0 mol‐% and 9,8 mol‐% epoxidized units were crystallized from the melt at temperatures (T~c~) of 25 to 36°C. The progress of the crystallization was monitored, and final crystallinities at T~c~ and after cooling to 25°C were measured using Fourier‐transform infrared spectroscopy. The morphology of samples, treated with OsO~4~ at 25°C after crystallization was complete, was observed using scanning electron microscopy. The crystallinity decreases linearly with increasing epoxy content at T~c~ = 25°C and 30°C and shows marked deviations from linearity at T~c~ = 36°C. Differences in morphology with epoxy content and T~c~ were observed. The differences in crystallinity between solution and melt crystallized samples are discussed.