Home
Resources
Publications
Influence of Co-Catalysts and Polymerization Conditions on Properties of Poly(anhydride- alt-epoxide)s from ROCOP Using Salen Complexes with Different Metals

Influence of Co-Catalysts and Polymerization Conditions on Properties of Poly(anhydride- alt-epoxide)s from ROCOP Using Salen Complexes with Different Metals

Matteo Proverbio, Nella Galotto Galotto, Simona Losio, Incoronata Tritto, Laura Boggioni

Polymers (Basel). 2019 Jul 22;11(7):1222.

PMID: 31336676

Abstract:

Cyclohexene oxide (CHO) and phthalic anhydride (PA) have been reacted in the presence of commercial salen-type complexes with different metals Cr (1), Al (2), and Mn (3) in combination with 4-(dimethylamino) pyridine (DMAP), bis-(triphenylphosphorydine) ammonium chloride (PPNCl) and bis-(triphenylphosphoranylidene)ammonium azide (PPNN3) as co-catalysts to obtain alternating poly(PA-alt-CHO)s by ring-opening copolymerization (ROCOP). The effect of different reaction conditions (pre-contact between catalyst and co-catalyst, polymerization time) on the productivity, molecular weight and glass transition temperature has been evaluated. By using a 24 h pre-contact, the aliphatic polyesters obtained were characterized by high molecular weight (Mn > 15 kg/mol) and glass transition temperature (Tg) up to 146 °C; the more sustainable metals Al and Mn in the presence of PPNCl give comparable results to Cr. Moreover, biodegradability data of these polyesters and the study of the microstructure reveal that the biodegradability is influenced more by the type of chain linkages rather than by the molecular weight of the polyesters.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP21050135	Bis(triphenylphosphoranylidene)ammonium chloride		21050-13-5	Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: