고속 전단 가공에 의한 PC/ABS 블렌드의 열적 물성 변화 연구

이형일; 이한기; 김대식; 최석진; 김선홍; 유재정; 용다경; 이승구; 이기윤; Hyeong Il Lee; Han Ki Lee; Dea Sik Kim; Seok Jin Choi; Seon Hong Kim; Jea Jung Yoo; Da Kyoung Yong; Seung Goo Lee; Kee Yoon Lee

Polymer(Korea), Vol.38, No.3, 320-326, May, 2014

Export Citation

고속 전단 가공에 의한 PC/ABS 블렌드의 열적 물성 변화 연구

Effects of the High Shear Rate Processing on the Thermal Properties of PC/ABS Blends

이형일, 이한기¹, 김대식¹, 최석진², 김선홍, 유재정³, 용다경³, 이승구 ³, 이기윤 ^†

충남대학교 고분자공학과
¹Hyundai Motor Group
²(주)현대엔지비
³충남대학교 유기소재섬유시스템공학과

Hyeong Il Lee, Han Ki Lee¹, Dea Sik Kim¹, Seok Jin Choi², Seon Hong Kim, Jea Jung Yoo³, Da Kyoung Yong³, Seung Goo Lee³, and Kee Yoon Lee^†

Department of Advanced Polymer Engineering, Chungnam National University, Gung-dong, Yuseong-gu, Daejeon 305-764, Korea
¹Department of Polymer Materials Research Team, Automotive Research & Development Hyundai Moter Group, Jangduk-dong, Hwaseong-si, Gyeonggi-do 445-706, Korea
²New Technology Development Team, Research&Development Division, Hyundai-NGV, 314 dong Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea
³Department of Advanced Organic Materials & Textile System Engineering, Chungnam National University, Gung-dong, Yuseong-gu, Daejeon 305-764, Korea

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초록

본 연구에서는 polycarbonate(PC)/acrylonitrile-butadiene-styrene(ABS) 블렌드의 고속 전단 가공 조건하에서의 열적 물성 변화에 대해 연구하였다. 고전단 압출 성형기(NHSS2-28)를 이용하여 공정조건인 스크류 회전속도와 전단 부하 시간을 변화시키면서 가공하였다. 고전단 부하 실험 후에 유리전이온도(Tg) 변화를 조사하여, 전단 부하 조건에 따라 약 143 ℃에서 약 133 ℃로 감소하는 경향을 관찰하였다. 열 중량 분석(TGA)을 통해 열분해 현상을 관찰하여 전단을 가하지 않은 경우 ABS와 PC의 분해곡선이 뚜렷한 두 단계로 나타났으나, 고속 전단 가공을 한 경우 분해하는 경향이 일직선상으로 변화되어 나타났다. 이에 대한 물성변화의 원인을 조사하기 위해 주사전자현미경(SEM)으로 관찰하여 분산상의 크기 또한 감소함을 확인하였고, 만능 재료 시험기(UTM)를 이용하여 신율이 고속 전단 가공을 한 경우, 소폭 감소하다가 특정 조건 이상에서는 급격한 감소를 보임을 관찰하였다. 결론적으로 적정한 고속 전단 응력 조건 이하에서는 PC/ABS 블렌드의 유리전이온도가 수렴하고, 적정 조건 이상에서는 유리전이온도가 급감하므로 전단응력에 의해 열화되는 것을 확인하였다.

The effects of high shear rate processing on the thermal properties of PC/ABS blends were studied. It was executed by the high shear processing machine (NHSS2-28) at the varied conditions of screw speeds and loaded duration. After the samples were processed with NHSS2-28, the Tgs were shifted from 143 to 133 ℃, and the behavior of degradation determined by TGA showed two distinct steps before high shear rate processing, while it showed a straight line after the processing. In order to provide the reasons of the properties, it was showen by SEM and UTM that the droplet sizes morphologically decreased after the processing, and the elongations decreased slightly until 1000 rpm of screw speed and then sharply decreased, according to the conditions of high shear rate processing. Therefore, it can be confirmed that Tg,s of PC/ABS blends were considerably shifted under an appropriate high shear rate condition, and rapidly dropped, so that blends degraded above the condition, due to stress-induced degradation.

Keywords:high shear rate processing;differential scanning calorimetry;glass transition temperature;PC/ABS.

[References]

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Hiroshi S, Plast. Sci., 6, 20 (2010)
Lee HK, Kim SH, Lee HI, Yoo JJ, Yong DK, Choi SJ, Lee SG, Lee KY, Korean Chem. Eng. Res., 52(2), 266 (2014)
Zhong H, Wei P, Jiang P, Wang G, Fire Mater., 31, 411 (2007)
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Sung YT, Han MS, Hyun JC, Kim WN, Lee HS, Polymer, 44(5), 1681 (2003)

[Referenced By]

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[1] Paul DR, Newman S, Polymer Blends, Academic Press Inc., New York (1978)

[2] Manson JA, Sperling LH, Polymer, Blends and Composites, Plenum, New York (1976)

[3] Lee IT, Kim BS, Park LS, Kwon YH, Chang JG, Polym.(Korea), 15(2), 141 (1991)

[4] Grabowski TS, U. S. Pat. 3,130,177 (1964)

[5] van Krevelene DW, te Nijenhuis K, Properties of polymers: Their Correlation with Chemical Structure; their Numerical Estimation and Prediction from Additive Group Contributions, Elsevier, Amsterdam (2009)

[6] Poul DR, Bucknall CB, Polymer Blends, Elsevier, New York (1978)

[7] Al-Jabareen A, Illescas S, Maspoch ML, Santana OO, J. Mater. Sci., 45(24), 6623 (2010)

[8] Chiang WY, Tzeng GL, J. Appl. Polym. Sci., 65(4), 795 (1997)

[9] Yazdi MH, Pearl LS, J. Therm. Anal. Cal., 96, 7 (2009)

[10] Zhang XF, Chen YS, Zhang Y, Peng ZL, Zhang YX, Zhou W, J. Appl. Polym. Sci., 81(4), 831 (2001)

[11] Balakrishnan S, Neelakantan NR, Saheb DN, Jog JP, Polymer, 39(23), 5765 (1998)

[12] Svoboda P, Eur. Polym., 45, 1485 (2009)

[13] Hiroshi S, Plast. Sci., 6, 20 (2010)

[14] Lee HK, Kim SH, Lee HI, Yoo JJ, Yong DK, Choi SJ, Lee SG, Lee KY, Korean Chem. Eng. Res., 52(2), 266 (2014)

[15] Zhong H, Wei P, Jiang P, Wang G, Fire Mater., 31, 411 (2007)

[16] Yoo SJ, Lee SH, Macromol. Res., 23, 1187 (2013)

[17] Sung YT, Han MS, Hyun JC, Kim WN, Lee HS, Polymer, 44(5), 1681 (2003)