Dicyanate/Polyarylate Semi-IPN의 몰폴로지와 물성에 관한 연구

김영득; 김성철

Polymer(Korea), Vol.19, No.1, 75-86, January, 1995

Export Citation

Dicyanate/Polyarylate Semi-IPN의 몰폴로지와 물성에 관한 연구

Morphology and Properties of Semi-IPN of Polyarylate and Bisphenol A Dicyanate

김영득, 김성철

초록

Semi-IPN의 개념을 이용하여 열경화성 수지의 내열성 및 내화학성과 열가소성 수지의 강인성을 조합한 재료를 제조하고 미세구조와 몰폴로지, 그리고 물성과의 연관 관계를 규명 하고자 하였다. 열경화성 성분으로 Bisphenol A dicyanate(BPACY) 수지를 사용하고 열가소성 성분으로 polyarylate(PAR)를 사용하여 용액 블렌딩 기법으로 semi-IPN을 제조하였다. 제조된 semi-IPN은 전 조성에서 투명하였.으나 전자현미경 관찰 결과와 동적 점탄성 측정 결과 상분리된 몰폴로지를 확인하였다. 본 시스템의 경우 최종 생성물의 몰폴로지는 BPACY 모노머의 반응 속도와 상분리 속도간의 상대적 우위에 의하여 결정된다. 본 연구에서는 조성, 반응 온도, 촉매의 함량 등을 변화시켜 최종 생성물의 몰폴로지를 조절하고 이것이 Izod 충격강도나 굴곡강도등의 기계적 물성에 미치는 영향을 살펴 보았다. 또한 Vicat 연화온도를 측정하여 제조된 semi-IPN의 내열특성을 고찰하였다.

In order to develop a material having balanced properties of the toughness of thermoplastic and the heat resistance of thermoset, semi-IPN's composed of bisphenol A dicyanate (BPACY) and polyarylate (PAR)was synthesized and its properties were studied. The semi-PN was synthesized by Polymerizing the mixture of BPACY monomer and polyarylate obtained by solution blending the two components and removing the solvent. Semi-IPN synthesized were transparent in all the composition, but scanning electron microscope (SEM) results of the semi-IPN's showed the phase separated morphology. Sea and island morphology of continuous polydicyanate and dispersed polyarylate above 85wt% of BPACY, while interconnected nodular morphology was observed when the composition was below 80wt% of BPACY. For the semi-IPN of BPACY 80wt%, sea and island morphology and interconnected nodular morphology co-existed and this implied that the phase inversion occurred at this composition. In the dynamic mechanical analysis(DMA), two T_gs were observed in IPN's having 50wt% or more poly(dicyanate), and single T_g was observed when the composition was below 50wt% of poly(dicyanate). It was observed that tensile strength elongation at break, flexural strength, and flexural modulus increased with increasing polydicyanate contents, while impact strength decreased with increasing polydicyanate content.

Keywords:semi-IPN;dicyanate;polyarylate

[References]

Grigat E, Putter R, Chem. Ber., 97, 3012 (1964)
Grigat E, Putter R, Angew. Chem.-Int. Edit., 6, 206 (1967)
Martin D, Bauer M, Org. Synth., 61, 35 (1983)
Bucknall CB, "Toughened Plastics," Wiley, New York (1977)
Kinloch AJ, Young RJ, "Fracture Behavior of Polymers," Applied Science Publishers, London (1983)
Riew CK, Rowe EH, Siebert AR, "Toughness and Brittleness of Plastics," Eds. by R.D. Deanin and A.M. Grugnola, pp. 326~343, American Chemical Society, Washington D.C. (1976)
Wertz DH, Prevorsek DC, Polym. Eng. Sci., 25(13), 804 (1985)
Shimp DA, SAMPE Quarterly, 19(1), 41 (1987)
Srinivasan SA, McGrath JE, SAMPE Quarterly, Apr., 25 (1989)
Hsieu ES, Miller RL, Sewal L, Int. Conf. Comps. Mater. ICCM-V Conf., 1665 (1985)
Lee BK, Kim SC, "Morphology and Properties of Semi-IPN of Polyetherimide and Bisphenol a Dicyanate," Submitted to Polymers for Advanced Technology (1994)

[Referenced By]

[1] Grigat E, Putter R, Chem. Ber., 97, 3012 (1964)

[2] Grigat E, Putter R, Angew. Chem.-Int. Edit., 6, 206 (1967)

[3] Martin D, Bauer M, Org. Synth., 61, 35 (1983)

[4] Bucknall CB, "Toughened Plastics," Wiley, New York (1977)

[5] Kinloch AJ, Young RJ, "Fracture Behavior of Polymers," Applied Science Publishers, London (1983)

[6] Riew CK, Rowe EH, Siebert AR, "Toughness and Brittleness of Plastics," Eds. by R.D. Deanin and A.M. Grugnola, pp. 326~343, American Chemical Society, Washington D.C. (1976)

[7] Wertz DH, Prevorsek DC, Polym. Eng. Sci., 25(13), 804 (1985)

[8] Shimp DA, SAMPE Quarterly, 19(1), 41 (1987)

[9] Srinivasan SA, McGrath JE, SAMPE Quarterly, Apr., 25 (1989)

[10] Hsieu ES, Miller RL, Sewal L, Int. Conf. Comps. Mater. ICCM-V Conf., 1665 (1985)

[11] Lee BK, Kim SC, "Morphology and Properties of Semi-IPN of Polyetherimide and Bisphenol a Dicyanate," Submitted to Polymers for Advanced Technology (1994)