Thermal degradation of polymers. part IV. Vacuum pyrolysis of poly(<i>m</i>‐aminostyrene). The residue and the fraction volatile at pyrolysis temperature involatile at room temperature

Methyl acrylate/acrylonitrile copolymers (MA/AN) were reactively compatibilized as the dispersed phase into poly(ethylene) (PE) for potential hydrocarbon barrier materials. The MA/AN was made reactive by including p‐aminostyrene (PAS), yielding terpolymers (MA/AN/PAS) with pendant primary amine functionality (number average molecular weight trueM¯n = 65–133 kg mol−1, dispersity (Đ)=1.83–2.53, molar composition of PAS in copolymer FPAS = 0.03–0.14, molar composition of AN = FAN = 0.27–0.52). The non‐functional MA/AN and amino functional MA/AN/PAS were each melt blended into PE that was grafted with maleic anhydride (PE‐g‐MAnn) at 200 °C at 70:30 wt % PE‐g‐MAnn:co/terpolymer. After extrusion, the dispersed phase particle size (volume to surface area diameter, 〈D〉vs) was coarse (12.6 μm) for the non‐reactive blend whereas it was much lower for the reactive blend ( 〈D〉vs= 1.2 μm). Coarsening after annealing at 150 °C was slow, but the domain sizes increased only slightly for both cases. The reactive blend was deemed sufficiently stable and thus was suitable as a candidate barrier material for further testing against olefins. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 44177.

Section: Resultsmentioning

confidence: 99%

Reactive compatibilization of poly(methyl acrylate‐ran‐acrylonitrile)/poly(ethylene) blends through amine–anhydride coupling

Gill

Marić

2016

Thermal degradation of polymers. V. Vacuum pyrolysis of poly(p‐N,N‐dimethylaminostyrene). The products volatile at pyrolysis temperature, liquid or gaseous at room temperature

Still¹,

Evans

Whitehead

1972

synopsisThe products obtained on degradation of poly (p-N,N-dimethylaminostyrene) in vacuo are described. The effects of molecular weight and pyrolysis temperature are discussed and the behavior compared with polystyrene under similar conditions. Product analysis has revealed significant differences between the pr0duct.s of degradation obtained from the two polymers, and mechanisms involving methyl-group migration have been proposed and discussed to account for the anomalous behavior of poly(pN,N-dimethylaminostyrene). The liquid products of pyrolysis have been separated and identified by gas-liquid chromatography using the Kovats retention index, and quantitative analysis is also described. Analysis of the gaseous fraction by mass spectrometry is described.

Thermal degradation of polymers. VI. Vacuum pyrolysis of poly(p‐N,N‐dimethylaminostyrene). The residue and the fraction volatile at pyrolysis temperature, involatile at room temperature

Still¹,

Whitehead

1972

synopsisThe effect of the extent of degradation of poly(p-N,Ndimethylaminostyrene) on the quantity and composition of the residue and the effect of pyrolysis temperature on the fraction volatile a t pyrolysis temperature are discussed. The behavior of poly(p-N,Ndimethylaminostyrene) is compared to that of polystyrene. A significant difference has been found for the behavior of the residue from poly(p-N,N-dimethylaminostyrene), which is ascribed to a crosslinking reaotion involving the dimethylamino substituent .Mechanisms to account for the observed products of degradation have been suggested and are discussed.