University of Minnesota

Cornell University

Saudi Aramco Technologies Company

James Eagan

Geoffrey William Coates

Frank Steven Bates

Anne M Lapointe

Jay J Farmer

Christopher A Simoneau

A semicrystalline multiblock copolymer includes alternating blocks of semicrystalline isotactic polypropylene (iPP) and semicrystalline polyethylene (PE), having a block arrangement according to formula (I):(iPP)(PE)(iPP)(PE)   (I),wherein p is 0 or 1; m is 0 or 1; n is 0 or 1; the sum of p, m, and n is 1, 2, or 3; and the sum of w, x, y, and z is greater than or equal to 40 kg/mol, with the provisos that: when m and n are 0, the sum of w and x is greater than or equal to 140 kg/mol; and when p and n are 0, the sum of y and x is greater than or equal to 140 kg/mol. Related compositions and methods are also provided.

Polyethylene and polypropylene block copolymers

A semicrystalline multiblock copolymer includes alternating blocks of semicrystalline isotactic polypropylene (iPP) and semicrystalline polyethylene (PE), having a block arrangement according to formula (I):(iPP)(PE)(iPP)(PE)&#x2003;&#x2003; (I),wherein p is 0 or 1; m is 0 or 1; n is 0 or 1; the sum of p, m, and n is 1, 2, or 3; and the sum of w, x, y, and z is greater than or equal to 40 kg/mol, with the provisos that: when m and n are 0, the sum of w and x is greater than or equal to 140 kg/mol; and when p and n are 0, the sum of y and x is greater than or equal to 140 kg/mol. Related compositions and methods are also provided.

Described herein are methods of preparing poly(alkylene carbonate) polymers comprising an increased ratio of primary hydroxyl end groups to secondary hydroxyl end groups, and compositions thereof.

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Austin, TX, United States of America

James Eagan