Synthesis of Aromatic Hyperbranched Polyester (HBPE) and its Use as a Nonmigrating Plasticiser

Abstract

A series of aromatic hyperbranched polyesters (HBPEs) were synthesised through one-pot reaction of benzene-1,2,4tricarboxylic anhydride, diethylene glycol, and methanol. The molecular structure of HBPEs was characterised by 1 H-NMR, Fourier transform infrared spectroscopy, gel permeation chromatography, differential scanning calorimetry (DSC), and thermogravimetric analysis. HBPE was used as plasticiser for poly(vinyl chloride) (PVC), and compared with traditional plasticiser bis(2-ethylhexyl) phthalate (DOP). When the plasticiser concentration in PVC was below 40 wt-%, HBPE showed better plasticisation efficiency than DOP, with enhanced impact strength and ultimate elongation. Volatility and extractability tests for PVC films indicated that there was no migration if HBPE was used as plasticiser, even under very harsh conditions, while the migration in PVC films plasticised by DOP was much greater, indicating that HBPE could be used as a substitution for DOP to lower the potential health risk from migrating phthalates during the use of PVC products.

Plasticizers Derived from Biomass Resources: A Short Review

“…Similar to epoxidized plasticizers, polyester plasticizers also serve as an alternative to phthalates because they may migrate from PVC products into human bodies or environment [46]. Materials such as long-chain linear polyester, poly(butylenes 2-methylsuccinate) (PBM) and aromatic hyperbranched polyesters (HBPEs) are considered as substitute of phthalates [47,48,49]. Sunny et al studied the performances of the PVC cooperated with di-(2-ethyl hexyl) phthalate (DEHP), nitrile rubber (NBR), carboxylated nitrile rubber (XNBR) and epoxidized natural rubber (ENR) [50].…”

Synthesis and characterization of bio-based alkyl terminal hyperbranched polyglycerols: a detailed study of their plasticization effect and migration resistance

“…We therefore anticipated that hyperbranched polymeric plasticizers would entirely resolve the drawbacks of the above-mentioned alternative plasticizers. Indeed, several hyperbranched polyesters 24,25 have already been reported as effective PVC plasticizers with an excellent migration resistance. However, their monomers were derived from petrochemical resources, their synthetic procedures were complex, and their production cost was much higher than traditional plasticizers.…”

The Hyperbranched Polyester Reinforced Unsaturated Polyester Resin

“…Hyperbranched polymers are used as new processing aids, rheological modifiers and compatibilizers of thermoplastic resins [ 12 , 13 ], and as toughening modifiers of thermosetting resins [ 14 , 15 , 16 , 17 ] resulting from their unique properties. Lipei Yue et al [ 18 ] synthesized a series of Aromatic Hyperbranched Polyesters (HBPEs) by one-pot reaction with 1,2,4-Benzenetricarboxylic anhydride, diethylene glycol and methanol as raw materials. Then HBPE was used as the plasticizer of polyvinyl chloride (PVC).…”