Poly(ethylene terephthalate) modification with the monomer from renewable resources (in English)

Abstract

Poly(ethylene terephthalate) modification with the monomer from renewable resources RAPID COMMUNICATION Summary-An emerging problem related to the development of biodegradable polymers from renewable resources was brought up in this work. Modification of petrochemical-based poly(ethylene terephthalate)(PET) with the use of bio-based monomer, namely dilinoleic acid (DLA) was presented. Series of multiblock copolymers containing oligo-PET as hard segments and DLA as soft segments was obtained in typical process of PET synthesis via polycondensation from the melt. PET/DLA copolymers containing W h = 30-90 wt. % of hard segments were characterized with respect to their mechanical, thermal and processing properties. It was demonstrated that at high concentration of DLA (W h = 30-40 wt. %) materials are susceptible to hydrolytic degradation. Key words: poly(ethylene terephthalate), biodegradable polyesters, dilinoleic acid, copolymer, thermal properties, mechanical properties. MODYFIKACJA POLI(TEREFTALANU ETYLENU) ZA POMOC¥ MONOMERU ZE RÓDE£ OD-NAWIALNYCH Streszczenie-Zaproponowano metodê otrzymywania z zastosowaniem surowców odnawialnych polimerów zdolnych do biodegradacji. Zastosowano poli(tereftalan etylenu)(PET), bêd¹cy produktem petrochemicznym, który modyfikowano za pomoc¹ kwasu dilinolowego (DLA) bêd¹cego monomerem bio-pochodnym, stanowi¹cym dimer kwasu t³uszczowego. Metod¹ polikondensacji w stopie otrzymano seriê kopolimerów zawieraj¹cych oligomery PET jako segmenty sztywne oraz DLA jako segmenty giêtkie. Kopolimery PET/DLA zawiera³y W h = 30-90 wt. % segmentów sztywnych. Zbadano ich w³aoeciwooeci mechaniczne, termiczne oraz przetwórcze. Wykazano, ¿e wysoka zawartooeae DLA (W h = 30-40 wt. %) sprzyja degradacji hydrolitycznej polimerów. S³owa kluczowe: poli(tereftalan etylenu), biodegradowalne poliestry, kwas dilinolowy, kopolimer, w³aoeciwooeci termiczne, w³aoeciwooeci mechaniczne.

Terahertz Time-Domain Spectroscopy of Graphene Nanoflakes Embedded in Polymer Matrix

“…The polymer matrix of the studied nanocomposites consisted of multi-block thermoplastic elastomer consisting of hard segments of poly(ethylene terephthalate) (PET) and soft segments of amorphous fatty acid ester sequences based on di-linoleic acid (DLA). The synthesis of both neat copolymers and nanocomposites was carried out in two stages, based on our previous work [26][27][28], in a kilo-scale (3.5-dm 3 ) Fourné Maschinenbau polycondensation reactor. Briefly, the first stage consisted of transesterification of dimethyl terephthalate (DMT) and ethylene glycol (EG), followed by esterification with DLA, and, finally, polycondensation.…”

Double-Emulsion Copolyester Microcapsules for Sustained Intraperitoneal Release of Carboplatin

“…Here, we set to develop a microencapsulation system that would provide a much longer release time, while maintaining zero-order kinetics. Towards this aim, we selected an aromatic/aliphatic polyester copolymer with poly(ethylene terephthalate) (PET) sequences as hard segments and poly(ethylene dilinoleate) soft segments [29]. This copolymer family, poly(ethylene terephthalate-co-ethylene dilinoleate) (PET-DLA), was developed to serve as elastomeric biomaterials and their in vivo biocompatibility has already been demonstrated [30].…”

“…This copolymer family, poly(ethylene terephthalate-co-ethylene dilinoleate) (PET-DLA), was developed to serve as elastomeric biomaterials and their in vivo biocompatibility has already been demonstrated [30]. Importantly, the incorporation of ethylene dilinoleate soft segments increases the amount of amorphous phase, increasing susceptibility to hydrolytic degradation [29,31], however indicating relatively low mass loss and a bulk erosion mechanism for the PET-DLA materials. We hypothesized that by using the previously developed double emulsion system with this poly(aromatic/aliphatic-ester) that is more hydrophobic and stable, as compared to the poly(ester-amide)-PEG copolymer we used previously, we could obtain carboplatin-containing microspheres with greatly extended zero-order release kinetics.…”

Influence of TiO2 Nanoparticles Incorporated into Elastomeric Polyesters on their Biocompatibility In Vitro and In Vivo

“…[4] Novel materials, namely poly(aliphatic/aromatic-ester)s (PED) of segmented (multiblock) structure (hard/soft segments) have been synthesized by El Fray and Slonecki [5] and extensively investigated for biomedical applications. [6][7][8] PEDs are composed of semicrystalline poly(butylene terephthalate) (PBT) or poly(ethylene terephthalate) (PET) hard segments [9] and unsaturated dimer of linoleic acid (DLA) soft segments. PEDs can be synthesized without the use of thermal stabilizers, which are often irritants, due to the excellent oxygen and thermal stability of the soft segment (DLA) component.…”