Miscible blends of amorphous polymers

Tremblay, Christophe; Prud’homme, Robert E.

doi:10.1002/pol.1984.180221102

Cited by 68 publications

(30 citation statements)

References 26 publications

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“…Tremblay and Prud'homme 23 examined the miscibility of blends of alkyl polymethacrylates with chlorinated polymers (including PVC, CPE, and CPVC) and found that a high chlorine content of the chlorinated polymer (48-56wt% Cl) and an optimum CH 2 /COO ratio in the polymethacrylate were required to obtain miscibility. However, CPE, PVC, and CPVC all have different sequence distributions of CH 2 and CHCl; thus these polymers can be expected to display different miscibility behaviors when blended with PMMA.…”

mentioning

confidence: 99%

Miscibility in Blends of Stereoregular Poly(methyl methacrylate)s with Chlorinated Polyethylenes and Chlorinated Poly(vinyl chloride)s

Ueda¹,

Karasz²

1994

Polym J

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ABSTRACT:Critical miscibility phenomena in binary blends of atactic, isotactic, or syndiotactic poly(methyl methacrylate)s (a-, i-, and s-PMMA) with chlorinated polyethylene (CPE) or chlorinated poly(vinyl chloride) (CPVC), each with systematically varying degrees of chlorination, were studied by measuring the glass transitions by differential scanning calorimetry. These systems show lower critical solution temperatures (LCSTs). The reversibilities of phase separation above the LCST and homogenization below the LCST in the systems were confirmed. The respective miscibility diagrams, i.e., miscibility as a function of temperature and composition expressed in chlorine weight percent, typically display "miscibility windows." Both CPE and CPVC are more miscible with s-and a-PMMA than with i-PMMA. The miscibility behavior of the PMMA/CPE system differs from that of the PMMA/CPVC system reflecting the influence of the microstructures of CPE and CPVC.

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confidence: 99%

Miscibility in Blends of Stereoregular Poly(methyl methacrylate)s with Chlorinated Polyethylenes and Chlorinated Poly(vinyl chloride)s

Ueda¹,

Karasz²

1994

Polym J

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“…If the cloud point values are taken to be a qualitative indication of the strength of interactions [21,22], halogen-containing polymethacrylates then interact more strongly with poly(alkyl methacrylate)s than with poly(alkyl acrylate)s. Low cloud-point values of blends of PVC with poly(alkyl acrylate)s and copolyacrylates have been reported [23]. The poorer miscibility of poly(alkyl acrylate)s as compared with poly(alkyl methacrylate)s has been attributed to the self-association of poly(alkyl acrylate)s involving the ␣-hydrogen and carboxyl groups [4].…”

Section: Discussionmentioning

confidence: 97%

“…Tremblay and Prud'homme [4] found that an optimum CH 2 /COO ratio of the poly(alkyl methacrylate) is required to achieve miscibility with chlorinated polymers. Walsh and Sham [23] found that the cloud points of blends of PVC with poly(alkyl acrylate)s or copolyacrylates are a function of carbonyl content.…”

Section: Discussionmentioning

confidence: 99%

“…Of the 52 binary systems, 16 are miscible. The rather large number of miscible systems is quite remarkable as poly(alkyl methacrylate) and poly(alkyl acrylate) are generally immiscible with each other except when the molecular weights of the polymers are low [4,17]. The incorporation of halogens in the pendant alkyl groups of poly(alkyl methacrylate)s induces miscibility with poly(alkyl acrylate)s.…”

Section: Poly(n-butyl Acrylate) Blendsmentioning

confidence: 99%

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Miscibility of Halogen-containing Polymethacrylates with Various Poly(alkyl acrylate)s

Peng

Goh

Lee

et al. 1997

Polym. Adv. Technol.

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“…When PMMA content exceeded 60 wt%, the system became heterogeneous. Differential scanning calorimetry (DSC) results 5 reported by Tremblay et al showed that PVC is miscible with PMMA in the range of PVC content up to 54%. The miscibility of PVC with ethyleneethyl acrylate--carbon monoxide terpolymers was studied by Robeson et al 6 by means of dynamic mechanical measurements.…”

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confidence: 98%

Thermally Stimulated Current Study of Poly(vinyl chloride)/Poly(ethylene-co-methyl methacrylate) Blends

Chen¹,

Yang

1993

Polym J

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ABSTRACT:Blends ofpoly(vinyl chloride) (PVC) and poly(ethylene-co-methyl methacrylate) (PEMMA) were prepared by solution blending in tetrahydrofuran (THF) and studied by Thermally Stimulated Current (TSC) measurements together with relaxation map analysis (RMA). Each of the TSC global spectra of these blends exhibited three peaks where the intermediate was found generated by space charge. The high temperature peak near 70°C was attributed to the glass transition (T.) of PVC-rich phase and the low temperature peak in the range of -70 to -40°C was related to the T. of PEMMA-rich phase. The significant shift of the low temperature peak from T.( = -36°C) of PEMMA was attributed to the interaction of p-transition of PVC with IX-transition ofPEMMA. Maximum interaction was also found at an PEMMA content of20wt%. Arrhenius lines in the RMA of the low temperature peak were found to intersect at a single compensation point. From which the critical temperature (TJ, the relaxation time (rJ and the degree-of-disorder of the polymer blends were obtained.KEY WORDS Thermally Stimulated Current / Relaxation Map Analysis / Poly(vinyl chloride) / Poly(ethylene-co-methyl methacrylate) / Compensation Point / The incorporation of other polymers into poly(vinyl chloride) (PVC) to improve physical properties has been long practiced. 1 ,2 In a report published by Nakamura et al.,3 PVC was shown to be immiscible with polyethylene (PE). However, by crosslinking at the interface of these two polymers using a dithiol as the crosslinking agent, phase dispersion and interfacial adhesion may be improved. In another report by Busscher et al.,4 mechanical blends of PVC and atactic poly(methyl methacrylate) (PMMA) were shown homogeneous when PMMA content was less than 60wt%. When PMMA content exceeded 60 wt%, the system became heterogeneous. Differential scanning calorimetry (DSC) results 5 reported by Tremblay et al. showed that PVC is miscible with PMMA in the range of PVC content up to 54%. The miscibility of PVC with ethyleneethyl acrylate--carbon monoxide terpolymers was studied by Robeson et al. 6 by means of dynamic mechanical measurements. Their results indicated the two to be miscible although PVC and poly(ethylene-co-ethyl acrylate) are immiscible. The improved miscibility by the incorporation of carbon monoxide into the copolymer is attributed to the specific interactions between the ketone carbonyl of the terpolymer and tertiary hydrogen of PVc.In this report, the miscibility of PVC with poly(ethylene-co-methyl methacrylate) is studied by a combination of thermally stimulated current measurements and relaxation map analysis.1015

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Miscible blends of amorphous polymers

Cited by 68 publications

References 26 publications

Miscibility in Blends of Stereoregular Poly(methyl methacrylate)s with Chlorinated Polyethylenes and Chlorinated Poly(vinyl chloride)s

Miscibility in Blends of Stereoregular Poly(methyl methacrylate)s with Chlorinated Polyethylenes and Chlorinated Poly(vinyl chloride)s

Miscibility of Halogen-containing Polymethacrylates with Various Poly(alkyl acrylate)s

Thermally Stimulated Current Study of Poly(vinyl chloride)/Poly(ethylene-co-methyl methacrylate) Blends

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