Polymer blends with poly ethylene/butylene

Qiua Z, Ikeharab T, Nishi T (2003) Melting behaviour of poly(butylene succinate) in miscible blends with poly(ethylene oxide). Polymer 44 3095-3099 Romen F, Reinhardt S, Jendrossek D (2(X)4) Thermotolerant poly(3-hydioxybutyrate)- degrading bacteria from hot compost and characterization of the PHB depolymerase of Schlegelella sp. KB la. Arch Microbiol 182 157-164... 

In order to obtain materials stable with good properties, the blends have to be compatibilized. In this work, we have investigated the effects of the compatibilization on the structure, rheological, and mechanical properties of blends of PET and PP. The compatibilizer used in this study is a triblock copolymer consisting of polystyrene end-blocks and poly(ethylene-butylene) mid-blocks grafted with maleic anhydride, MA-g-SEBS. This copolymer was already used to compatibilize other blends of polar and apolar polymers with satisfactory results. 

Mixing of polymers is an important process in the polymer industry by combining the strength of different polymers through blending, new products with desirable physical properties can be produced [2]. FT-IR imaging with a micro-ATR objective has been used to study the effect of a compatibilizer on the mixing of two immiscible polymers, namely polystyrene (PS) and low-density polyethylene (LDPE). The compatibilizer used in this study is a triblock copolymer of polystyrene-f -poly(ethylene-butylene)-f)-polystyrene (SEES). The blends are prepared with a micro-extruder, which allows small amounts of the materials to be blended [2]. The two polymers are easily characterized by their specific absorption bands at 1492 and 1450 cm for PS and the band at 1466 cm for LDPE. 

The decorative laminates described in the previous chapter are made with selected thermosetting resins while resins of this type can be moulded and extruded by methods similar to those outlined in the present and the next chapter the materials employed for these processes predominantly are thermoplastic. Many such plastics can be moulded and extruded under suitable conditions, the most important in terms of quantities used being those that combine properties satisfactory for the purpose with convenience in pro-cessing-especially the polyolefins (polyethylene and polypropylene), poly(vinyl chloride), and styrene polymers and blends. Other plastics with special qualities, such as better resistance to chemical attack, heat, impact, and wear, also are used—including acetals (polyformaldehyde or polyoxymethylene), polyamides, polycarbonates, thermoplastic polyesters like poly(ethylene terephtha-late) and poly(butylene terephthalate), and modified poly(phenylene oxide),... 

After having studied in our laboratory, polymer blends of amorphous polymers poly-c-caprolactone and poly (vinyl chloride) (1,2) (PCL/ PVC), blends with a crystalline component PCL/PVC (3,4), poly(2,6-dimethyl phenylene oxide) (PPO) with isotactic polystyrene (i-PS) (5) and atactic polystyrene (a-PS) with i-PS (6), we have now become involved in the study of a blend in which both polymers crystallize. The system chosen is the poly(1,4-butylene terephthalate)/poly(ethylene terephthalate) (PBT/PET) blend. The crystallization behavior of PBT has been studied extensively in our laboratory (7,8) this polymer has a... 

The binary blends of polycarbonate with poly(butylene terephthalate) (PBT/PC) or poly(ethylene terephthalate) (PET/PC) are now known to be essentially phase-separated blend systems exhibiting two glass transition temperatures in each case, one for the polycarbonate-rich phase and another for the polyester-rich phase (Murff et al. 1984 Huang and Wang 1986 Wahrmund et al. 1978). The evaluation of the amorphous phase miscibility in these blends was often complicated by the potential of a transesterification reaction between the two polymers during the melt blending, which may in principle lead to a block copolymer and eventually to... 

Poly(butylene adipate-co-terephthalate) (PBAT), poly(butylene succinate) (PBS) or poly(ethylene succinate) (PES) are flexible biodegradable polyesters that have also been considered for blending with PLA. PBAT and PLA are immiscible polymers where PBAT phase formed small droplets in the PLA matrix. Drastic increase of elongation at break was observed (200% with only 5 wt% of PBAT) due to interfacial debonding mechanisms as the interfacial adhesion between the two polymers was low. The impact... 

Another property recently reported in detail for polyarylate is in the polymer blend area. An early French patent [33] noted that Bisphenol A polyarylate and poly(ethylene terephthalate) yield interesting mixtures. Further studies by Kimura et al. [34] and Robeson [35] found that with modest ester-exchange polyarylate and poly(ethylene terephthalate) form miscible mixtures (thus transparent with Tg values between the constituent values). Polyarylate and poly(butylene terephthalate) were noted to be miscible without ester-exchange [36]. Miscibility of three different cyclohexane dimethanol based polyesters with polyarylate was observed under minimum time and temperature exposure conditions [35]. 

Acharya et al. [26] and Gcwabaza et al. [28] used XRD to study the effects of nanoclay (OMMT) loading on the morphology of polymer blend nanocomposites for an ethylene propylene diene terpolymer (EPDM)ZEVA and a polypropylene/poly(butylene succinate) (PP/PBS) blend, respectively. Both studies showed an increase in the intensity of the diffraction peak due to nanoclay with an increase in the nanoclay loading, but the location (20) of the peak seems not to be affected by the increase of nanoclay loading. 

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