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Polymer 53 (2012) 810-822

Kinetic Partitioning of Comonomer in Random Propylene 1-Butene Copolymers Rufina G. Alamo, Florida State University, DMR 1105129.

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Polymer 53 (2012) 810-822

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  1. Kinetic Partitioning of Comonomer in Random Propylene 1-Butene CopolymersRufina G. Alamo, Florida State University, DMR 1105129 Polypropylenes are among the most important large volume polyolefins produced in the world. The properties of random propylene and 1-alkene copolymers depend on the details of the crystalline structure acquired during crystallization. We have studied the partitioning of 1-butene in fast and slowly crystallized copolymers by WAXD, 13C NMR, and FTIR. A partial inclusion of the 1-butene co-unit in the crystallites is identified by the expansion of the unit cell in WAXD patterns. The content of crystalline 1-butene increases with content of comonomer in the chain and with crystallization rate. The faster the rate, the higher is the 1-butene entrapped in the crystallites, and the Bragg’s distance shifts to higher values. Mesomorphic structures, obtained under the fastest cooling, accommodate the highest content of comonomer units, which were quantified by 13C NMR and FTIR. Polymer 53 (2012) 810-822

  2. Kinetic Partitioning of Comonomer in Random Propylene 1-Butene CopolymersRufina G. Alamo, Florida State University, DMR 1105129 Outreach: Freshman FSU Honors Chemistry students have been integrated in our research activities for one semester as part of their laboratory requirements. The PI gives general lectures in polymers in the Fall semester to freshman and junior FSU female students who participate in WINSE (Women in Science and Engineering), a university program which focuses on the retention of women in science and engineering. The picture below shows PI and WIMSE students. Education at postgraduate, graduate and undergraduate level: • One PhD student: H. Janani (2nd year) • Two MS students: Papatya Kaner (graduated in Spring 2012) and Wei Zhang (2nd year) • One post-doctoral fellow: Dr. Carolina Ruiz-Orta • One Honors undergraduate student: Benjamin Reid (Chemical and Biomedical Engineering) • Hosted two trainee graduate students: Masafumi Tasaki (10-05-11/1-10-12), from Toyota Technological Institute in Nagoya, Japan, and Laura Santonja Blasco from Polytechnic University of Valencia, Spain.

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