English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Extended Abstract With a global share of nearly 20% in the thermoplastics market and an annual growth rate of more than 4%, polypropylene plays a special role in the group of so-called “commodity polymers”. One key reason for this success is the flexibility in terms of composition and property design. The major part of the industrial production of polypropylene is based on MgCl2-supported Ziegler–Natta catalysts. [1] Starting from the third generation Ziegler–Natta catalysts, an internal electron donor has been widely used to boost the performance of the catalyst; it does not only influence the activity, but also controls the molecular structure, like the isotacticity and comonomer insertion in case a second monomer is applied. [2-3] Actually, the electron donor is one of key factors to classify the generation of Ziegler–Natta catalysts. In the current study, the impact of a non-phthalate based internal donor on the polymerization behaviour of a novel Ziegler–Natta catalyst from an emulsion process was evaluated. [4-5] Changing the internal donor from phthalate to nonphthalate compound significantly changes the H2 response of the catalyst. High melt flow rate products are easily achieved with the new catalyst, which is desired in many applications. Isotacticity of the homopolymer, evaluated with C NMR, increases significantly with this new catalyst, therefore the properties of the products are improved, e.g. the stiffness. Moreover, the new internal donor can supress the production of oligomers, reducing the amount of volatiles of the finished products. In the end, the benefits of the new catalyst in certain application areas, e.g. thin wall packaging, are demonstrated. The new donor changes the comonomer insertion, therefore the long term performance is improved significantly. [6]

Impact of a Non-Phthalate Based Internal Donor on the Polymerization Behaviour of a Novel Ziegler - Natta Catalyst