Electron probe microanalysis for the study of inter-diffusion and phase equilibrium in a PVC-PMMA system

Chalykh, A.Ye.; Sapozhnikova, I.N.; Aliyev, A.D.

doi:10.1016/0032-3950(79)90369-1

Cited by 12 publications

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“…Evidently the helical isotactic conformation hinders the donor-acceptor interaction between carboxyl and chlorine. Atactic PMMA appears to be compatible only over a restricted range of compositions (15,51). Polycarbonate (PC), while not wholly compatible with PVC, does raise the Tg (52).…”

Section: Application Of Principles Of Modification To Pvcmentioning

confidence: 99%

Behavior of copolymers, blends and alloys

Manson¹

1981

Pure and Applied Chemistry

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-While poly(vinyl chloride) possesses an excellent balance of cost and properties, it is often modified by the incorporation of comonomers, monomeric and polymeric plasticizers, and polymers of various kinds. In this way the processability, state, mechanical properties and environmental behavior can often be improved. This lecture reviews the principles that underly such modifications and discusses applications of these principles, with emphasis on recent developments.

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Section: Application Of Principles Of Modification To Pvcmentioning

confidence: 99%

Behavior of copolymers, blends and alloys

Manson¹

1981

Pure and Applied Chemistry

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Plastic‐rubber composite, 1. The polymer‐polymer interdiffusion at the phase boundary of poly(oxy‐2,6‐dimethyl‐1,4‐phenylene) and polystyrene

1990

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SUMMREThe interdiffusion of poly(oxy-2,6-dimethyl-l,4-phenylene) (PPE) and polystyrene (PS) sequences is the key step in the formation of the commonly called plastic-rubber composite (Kunststoff-Kautschuk-Verbund, K&K-V). This new process bonds PPE and poly(styrene-co-butadiene) rubber (SBR) during the vulcanization of the rubber, without the aid of any adhesive. As PPE and PS are f d y mutually compatible polymers, polymer-polymer interdiffusion takes place readily. PS was therefore used as a model system. Electron microscopy clearly demonstrates that the kinetics of the diffusion process are determined by the faster diffusing PS. This was studied in the temperature range of 180°C to 260OC. The interdiffusion coefficients are of the order of lo-" to lo-'' cm2 * s-'. These are significantly higher than the selfdiffusion coefficients of PPE and PS, which are lo-'' and lo-'' cm2s-', respectively. The interdiffusion coefficients are dependent on temperature and inversely proportional to the PS molecular weight. for PS molecular weights higher than the entanglement value. The diffusion process follows Fick's law. The interdiffusion coefficient is not, or is only weakly, dependent on the concentration. The interdiffusion of PS samples of molecular weights below the entanglement value is observed by a newly developed method based on Fourier transform infrared spectroscopy with attenuated total reflection technique (FT'IR-ATR). In this low-molecular-weight region, interdiffusion coefficients as high as lo-' cm2 * s-' are obtained. 0 1990, HUthig & Wepf Verlag, Basel CCC 0025-1 16X/90/%03.00

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