Synthesis of AB and ABA block copolymers as compatibilizers in nylon 6/polycarbonate blends

Montaudo, Giorgio; Puglisi, Concetto; Samperi, Filippo; Lamantia, Francesco Paolo

doi:10.1002/(sici)1099-0518(199605)34:7<1283::aid-pola15>3.0.co;2-5

Cited by 26 publications

(12 citation statements)

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“…It has been reported that, the polyester chain would break at the ester bond site in the presence of catalyst . Then, CH 3 CH 2 CO would attack secondary amine group (NHCH 2 ) or the terminated NH 2 of Nylon 1010 and the ester‐amide exchange could occur as shown in Scheme (2) and (3) . It shows that the ester‐amide exchange reactions between amide groups of Nylon 1010 and the ester carbonyl groups of ACM, leading to the formation of new copolymers comprised of the segments detached from Nylon 1010 and ACM chains.…”

Section: Resultsmentioning

confidence: 98%

Effects of blending time and catalyst on the properties of nylon 1010/acrylate rubber blends

Zhang

2013

J of Applied Polymer Sci

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Nylon 1010 and acrylate rubber (ACM) were prepared by melt blending. The effects of blending time and catalyst on the properties of the blends were studied. It was found that ester-amide exchange reactions between the Nylon 1010 and ACM occurred during melt processing. Long blending time and Tetrabutyl titanate (Ti(OBu) 4 ) as a catalyst could promote the reactions, and grafted copolymer Nylon-g-ACM was in situ generated as a compatibilizer during processing procedure. The tensile strength of the blends increased from about 12.0-15.0 MPa when the blending time increased from 10 to 30 min. The presence of Ti(OBu) 4 led to the decrease in melt flow index (MFI), independent of the blending time (30 or 60 min). Glass transition temperature and heat of fusion of the blends increased after addition of the catalyst. Rheological behavior analysis provided evidence of formation of Nylon-g-ACM graft copolymer. Scanning electron microscopy (SEM) showed that the compatibility of the blends was improved by longer blending time and the addition of catalyst.

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Section: Resultsmentioning

confidence: 98%

Effects of blending time and catalyst on the properties of nylon 1010/acrylate rubber blends

Zhang

2013

J of Applied Polymer Sci

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“…As misturas físicas de PA6/PC quando processadas a 240 °C durante 10, 30 e 60 minutos, apresentam aumento nos valores de torque durante o processo de mistura [2][3][4][5][6][7] . Nos 5 minutos iniciais, as misturas sofrem processo de fusão, que é caracterizado pela diminuição do torque.…”

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“…Esses copolímeros podem atuar como agente interfacial, melhorando a compatibilidade da mistura [1][2][3][4][5][6] . O Esquema 1 apresenta a reação de troca entre as cadeias de PA6 e de PC com a formação do copolímero em bloco [1][2][3] .…”

Section: Introductionunclassified

Mistura reativa de poliamida 6 e policarbonato: reatividade do copolímero formado "in situ"

et al. 2004

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Resumo: As misturas físicas de poliamida 6 (PA6) e policarbonato (PC) processadas a 240 ºC, durante 10, 30 e 60 minutos formam um copolímero de PA6-PC. A alta temperatura e o longo tempo de processamento podem causar modificações nas propriedades dessas misturas e degradar o copolímero, originando grupos isocianato e subseqüentemente CO 2 e grupos NH 2 terminais. A quantidade de copolímero PA6-PC formado durante o processo de mistura é maior com o aumento da proporção de PC na mistura. As ligações uretânicas de polímeros termoplásticos exibem mais baixas estabilidades térmica e oxidativa, resultando no aumento da concentração de grupos terminais NH 2 . A reatividade dessas misturas foi investigada através do torque durante o processo de mistura, da titulação potenciométrica dos grupos NH 2 terminais e por microscopia eletrônica de varredura.Palavras-chave: Poliamida 6, policarbonato, mistura reativa. Polyamide 6 and Polycarbonate Reactive Blends: Reactivity of the Copolymer Formed "In Situ"Abstract: Polyamide 6 (PA6) and polycarbonate (PC) blends processed at 240 °C, during 10, 30 and 60 minutes produced a copolymer of PA6-PC. The high temperature and long processing time can cause modifications on the properties of these blends and degradation of the copolymer. It can also form isocyanate groups and subsequently CO 2 and NH 2 "end groups". The amount of PA6-PC copolymer formed during the blending process was found to increase when the PC content is increased. The thermoplastic urethanes normally exhibit smaller thermal and oxidative stability, resulting in an increase in the concentration of NH 2 terminal groups. The reactivity of the blends was investigated by monitoring the torque during the blending, potentiometer titration of NH 2 terminal groups and scanning electronic microscopy (SEM).

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“…The compatibilization of polyamide 6 (PA6) and polycarbonate (PC) can be performed through the PA6–PC block copolymer, synthesized in situ during a long melt mixing process 1–13. The internal carbonate groups of PC may react with the amino terminal groups of PA6, during the melt mixing process, at 240°C.…”

Section: Introductionmentioning

confidence: 99%

“…The internal carbonate groups of PC may react with the amino terminal groups of PA6, during the melt mixing process, at 240°C. The formation of PA6–PC copolymers suggests that they can act as compatibilizers inducing the compatibility of the heterogeneous blends of PA6/PC 1, 2, 8…”

Section: Introductionmentioning

confidence: 99%

Blends of polyamide 6, polycarbonate, and poly(propylene oxide). II. Reactive compatibilization–thermal degradation relationships

Costa

Oliveira

2001

J of Applied Polymer Sci

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The thermal degradation of some blends of polyamide 6/polycarbonate (PA6/PC) and polyamide 6/polycarbonate/poly(propylene oxide) (PA6/PC/PPO) were investigated. The copolymer formed during the mixing of polyamide 6 and polycarbonate, at 240°C, for 30 min, increases the thermal stability of PA6/PC and of PA6/PC/PPO blends. This increase in the thermal stability occurs due to the plasticizing effect of PPO, which increases the mobility of the molecules of PA6 and PC, and consequently increases the probability of the reaction between the -NH 2 and -O-CO-O groups of polyamide 6 and polycarbonate, respectively. The ternary blends with PPO (5-10% w/w) have lower thermal stability than PA6/PC blends. This is due to the decrease of miscibility between these polymers and the rise of the diluting effect.

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Synthesis of AB and ABA block copolymers as compatibilizers in nylon 6/polycarbonate blends

Cited by 26 publications

References 0 publications

Effects of blending time and catalyst on the properties of nylon 1010/acrylate rubber blends

Effects of blending time and catalyst on the properties of nylon 1010/acrylate rubber blends

Mistura reativa de poliamida 6 e policarbonato: reatividade do copolímero formado "in situ"

Blends of polyamide 6, polycarbonate, and poly(propylene oxide). II. Reactive compatibilization–thermal degradation relationships

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