Article
  • Characterization of the Dynamic Properties of Natural Rubbers Coagulated Using Different Methods
  • Gao T, Xie R, Zhang L, Li P, Gui H, Huang M, Chung K
  • 응고 방법에 따른 천연고무의 동적특성
Abstract
Natural rubber (NR) was coagulated using different methods, i.e., acid coagulation with acetic acid (A-NR), natural coagulation (N-NR), and microorganism coagulation (M-NR). The crosslink density, vulcanization properties, dynamic properties, and heat build-up were investigated. The results showed that M-NR had the highest crosslink density and fastest cure rate, and A-NR had the lowest crosslink density and slowest cure rate. The dynamic properties were measured using a rubber process analyzer, dynamic thermomechanical analysis and compression heat build-up tester; the results showed that the dynamic properties had a close relationship with the crosslink density. The loss factor was lowest for M-NR and highest for A-NR.

천연고무 라텍스를 아세트산을 사용한 응고(A-NR), 자연 응고(N-NR) 및 미생물을 사용한 응고(M-NR) 등 다른 방법들로 응고하였고, 이들의 가교도, 가교특성, 동적특성 및 열축적 특성 등을 조사하였다. 결과에 따르면 MNR의 경우 가장 높은 가교도와 가장 빠른 경화속도를 나타냈으며, A-NR은 정 반대인 가장 낮은 가교도와 가장 느린 경화속도를 나타내었다. 이들 고무의 동적특성은 rubber process analyzer(RPA), dynamic mechanical analyzer(DMA) 및 압축 열축적 분석방법 등을 이용하여 측정하였다. 동적특성은 고무의 가교도와 매우 밀접한 관계가 있었음을 알 수 있었고, 손실계수는 M-NR이 가장 낮았으며 A-NR의 경우는 가장 높은 값을 나타내었다.

Keywords: natural rubber; crosslink density; dynamic properties; coagulation method

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2016; 40(3): 446-451

    Published online May 25, 2016

  • 10.7317/pk.2016.40.3.446
  • Received on Dec 29, 2015
  • Accepted on Feb 17, 2016