Synthesis and Reaction of Anthracene-Containing Polypropylene: A Promising Strategy for Facile, Efficient Functionalization of Isotactic Polypropylene

Abstract

A novel anthracene-containing isotactic polypropylene (An-iPP) with high molecular weight (>10 × 104) and satisfying incorporation (5.7 mol %) was synthesized via direct copolymerization of propylene and 9-hexenyl­anthracene. The pendent anthryl group of the resulting An-iPP is quite active, and this provides a facile and efficient avenue to synthesize various functional iPPs. As a typical and important example, maleic anhydride (MA) functionalized polypropylene, was successfully prepared in a highly efficient, catalyst-free, byproduct-free, and controllable way via mild Diels–Alder (D–A) reaction between pendent anthryl groups and MA. More importantly, the D–A functionalization process did not sacrifice the original properties of the An-iPP, as no unfavorable degradation and cross-linking were detected in DSC and GPC analyses. Besides MA, several other dienophiles could also be conveniently used as functional reagents to prepare various functionalized iPPs with distinct properties. The unique fluorescent property of An-iPP was studied and could be used for functionalization process monitoring.

Two- and Three-Component Post-Polymerization Modifications Based on Meldrum’s Acid

“…The reactions used in PPM generally need to show a clean, efficient, specific, and robust “click chemistry” style. , Besides, the reactive monomers have to be easily synthesized and smoothly polymerized in a controlled manner. Several effective reactions were introduced into PPM, for example Cu­(I)-catalyzed and metal-free azide–alkyne cycloaddition reactions, Diels–Alder (DA) cycloaddition, , thiol–ene/–yne addition, − thiol–disulfide exchange, , and activated ester–amine/alcohol substitutions, ,,− Michael addition, , ketones and aldehydes/amines, , etc. Reactions mentioned above provide access to PPM of reactive polymers with one functional group in each repeat unit.…”

Effect of modified layered double hydroxide on the flammability of intumescent flame retardant PP nanocomposites

“…Because of its lightweight, excellent processing properties and good dimensional stability, it is widely used in many fields such as the electronics industry, automobiles, and packaging films. [1][2][3] Unfortunately, PP is a flammable material, and its limiting oxygen index (LOI) is only 18%. Once ignited, it is extremely flammable and cannot meet the application fields that require high flame-retardant properties.…”

“…Polypropylene (PP) is one of the five most common general‐purpose plastics. Because of its lightweight, excellent processing properties and good dimensional stability, it is widely used in many fields such as the electronics industry, automobiles, and packaging films 1–3 . Unfortunately, PP is a flammable material, and its limiting oxygen index (LOI) is only 18%.…”

Synthesis of fluorinated polypropylene using CuAAC click chemistry

“…The use of click chemistry reactions in the modification of the polyolefins provides many advantages such as high yield, low specificity, and high spatial and temporal controls. Various click chemistry reactions including thiol‐ene, Cu(I) catalyzed 1,3‐dipolar cycloaddition (CuAAC), Diels‐Alder, and thiol‐halogen have been extensively utilized for the modification of polyolefins. Among them, the CuAAC of azide and alkyne groups is very general, robust and particularly simple, it is most popular route compared to the other click reactions.…”