Polyethylene with Laddered Long-Chain Branching

Key words

low-density polyethylene - long-chain branching - ladder polymer - polyolefins

Significance

Low-density polyolefin (LDPE) with long-chain branching (LCB) is an important type of commodity product, in which the LCB is usually introduced by a radical process under high-pressure conditions. In this work, a more cost-effective synthetic method is developed for LDPE with ladder-type LCB, presenting similar rheological properties to conventional LDPE.

Comment

The imino-enamido Hf catalyst is selected for its advantageous dual active sites. Hence, two polymer chains can grow from a single catalytic center. With diene introduced as a co-monomer, laddered LCB can be achieved, and the unique polymer structure is confirmed by ¹³C NMR spectroscopy.

Publication History

Article published online:
14 June 2024