Proton &amp; Carbon NMR Spectra of Polymers

2018

We studied the morphological, mechanical, and rheological properties of polycarbonate (PC) and poly(acrylonitrile-butadiene-styrene) (PolyABS) blends with different types of compatibilizer. Styrene-acrylonitrile-maleic anhydride terpolymer (SAM) was used as a compatibilizer of the blends. For comparison, styrene-acrylonitrile-glycidyl methacrylate terpolymer (SAG) was also used as a compatibilizer. For the PC-PolyABS (70/30 wt %) blends with SAM, the mechanical strength and complex viscosity reached a maximum when the SAM concentration was 5 phr. The mechanical and rheological results of the blend were consistent with the morphological result that the PolyABS domain size reached a minimum when the SAM content was 5 phr. The interfacial tension (a) of the blend was compared with the compatibilizer type and content, which were calculated by the Palierne emulsion model with the relaxation time of the PC-PolyABS blend. The a is consistent with the morphological and mechanical properties of the PC-PolyABS blend. The results of the morphological, mechanical, and rheological properties of the blend suggest that SAM was a more effective compatibilizer than SAG, and the optimum compatibilizer content of SAM was 5 phr. V C 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46418.

Section: Resultsmentioning

confidence: 99%

Relationship between the interfacial tension and compatibility of polycarbonate and poly(acrylonitrile–butadiene–styrene) blends with reactive compatibilizers

Ryu

2018

“…Figure (a,b) shows the C‐NMR spectra of the poly(MABS)/SAN‐ co ‐GMA (50/50) (GMA content 0.25 wt %) and poly(MABS)/SAN‐ co ‐GMA (50/50) (GMA content 0.0 wt %) blends, respectively. The NMR spectra in Figure (a,b) show a carbonyl peak (CO) at 150 ppm (peak A), which indicates the existence of the ester group in the poly(MABS) or GMA component . Peak B at 135 ppm indicates carbon of the aromatic group in the styrene component of SAN, and peaks C and E at 50 and 38 ppm represent aliphatic carbon (CH 2 ) and carbon in nitrile component (CN), respectively …”

Section: Resultsmentioning

confidence: 99%

“…The NMR spectra in Figure 8(a,b) show a carbonyl peak (C@O) at 150 ppm (peak A), which indicates the existence of the ester group in the poly(MABS) or GMA component. 26 The difference between Figure 8(a,b) is the peak D at 44 ppm, which represents aliphatic carbons (ACH 2 ). 28 The peak D shown in Figure 8(a) may suggest the chemical reaction between the carboxylic group of poly(MABS) and the epoxy group in SAN-co-GMA, which produces aliphatic linkage at 44 ppm of the NMR spectrum.…”

Section: Nmr Spectroscopy Of the Blendsmentioning

confidence: 99%

Gloss reduction and morphological properties of polycarbonate and poly(methyl methacrylate‐acrylonitrile‐butadiene‐styrene) blends with SAN‐co‐GMA as a reactive compatibilizer

Kwon

2018

The gloss properties of the polycarbonate (PC)/poly(methyl methacrylate‐acrylonitrile‐butadiene‐styrene) (MABS) blend with styrene‐acrylonitrile‐co‐glycidyl methacrylate (SAN‐co‐GMA) as a compatibilizing agent were investigated. For the PC/poly(MABS)/SAN‐co‐GMA (65/15/20, wt %) blend surface, the reduction of gloss level was observed most significantly when the GMA content was 0.1 wt %, compared with the blends with 0.05 wt % GMA or without GMA content. The gloss level of the PC/poly(MABS)/SAN‐co‐GMA (0.1 wt % GMA) blend surface was observed to be 35, which showed 65% lower than the PC/poly(MABS)/SAN‐co‐GMA blend without GMA content. The gloss reduction was most probably caused by the insoluble fractions of the PC/poly(MABS)/SAN‐co‐GMA blend that were formed by the reaction between the carboxylic acid group in poly(MABS) and epoxy group in SAN‐co‐GMA. The results of optical and transmission electron microscope analysis, spectroscopy study, and rheological properties supported the formation of insoluble structure of the PC/poly(MABS)/SAN‐co‐GMA blend when the GMA content was 0.1 wt %. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46450.

“…Peaks F and G represent the aliphatic carbon ( CH 2 ) in the side chain of butyl acrylate, and peak H indicates the aliphatic carbon ( CH 2 ) in the PBT. 42 Figure 8(a,b) shows similar patterns regardless of the addition of EGMA-g-SAN. The only difference between the spectra in Figure 8(a,b) is the peak E of aliphatic carbon ( CH 2 ) at 30 ppm.…”

Section: Resultsmentioning

confidence: 75%

“…Peaks C and D represent the aliphatic carbon (CH 2 ) in the main chain of styrene and butyl acrylate. Peaks F and G represent the aliphatic carbon (CH 2 ) in the side chain of butyl acrylate, and peak H indicates the aliphatic carbon (CH 2 ) in the PBT . Figure (a,b) shows similar patterns regardless of the addition of EGMA‐ g ‐SAN.…”

Section: Resultsmentioning

confidence: 86%

Weathering properties and hydrolysis of poly(butylene terephthalate)/poly(acrylonitrile‐co‐styrene‐co‐acrylate) blend with reactive compatibilizer

Kwon

2018

The effects of compatibilizer on the weathering properties and hydrolysis of the poly(butylene terephthalate) (PBT)/poly(acrylonitrile‐styrene‐acrylate) (PolyASA) blend (70/30 wt %) were investigated. Poly(ethylene‐co‐glycidylmethacrylate‐g‐styrene‐co‐acrylonitrile) (EGMA‐g‐SAN) was used as a compatibilizer of the blend. When the EGMA‐g‐SAN content was 3 phr, the impact and tensile strengths of the PBT/PolyASA blend showed maximum; as the EGMA‐g‐SAN content was increased from 0 to 3 phr, the impact strength of the blend increased from 6.1 to 9.5 kJ m−2. The rheological results showed that when the EGMA‐g‐SAN was 3 phr, the storage modulus and complex viscosity of the blend also showed maximum value. The mechanical and rheological results of the blend were consistent with the morphological result that when the EGMA‐g‐SAN was 3 phr, PolyASA domain size of the blend showed minimum. The weathering results showed that when the EGMA‐g‐SAN content was 3 phr, the gloss value of weathered surface of the blend showed maximum. After hydrolysis test, when the EGMA‐g‐SAN content was 3 phr, the impact and tensile strengths of the blend showed maximum. The mechanical, rheological, and weathering results suggested that EGMA‐g‐SAN is an effective compatibilizer in the PBT/PolyASA blend, and the optimum compatibilizer content is 3 phr. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47197.