Iranian Polymer Journal

, Volume 28, Issue 11, pp 991–999 | Cite as

Balanced strength and toughness improvement in polylactide (PLA)/poly(1,4-cyclohexylene dimethylene terephthalate glycol) (PCTG) blends using various compatibilizers

  • Hong-Jiang Song
  • Xiao-Dong Chen
  • Jin-Chen FanEmail author
  • Qun-Jie XuEmail author
Original Research


Generally, improving the toughness of polylactic acid (PLA) is very important for its practical applications. Blending with elastomer is considered to be the effective way for property modification of PLA. As an efficient toughener, the elastomer poly(1,4-cyclohexylene dimethylene terephthalate glycol) (PCTG) showed great potential in improving the toughness of PLA. However, the compatibility between PLA and PCTG is still a key problem. Here, the PLA/PCTG blends with various compatibilizers of SOG-02, SAG-008, and AX8900 were successfully prepared using melt compounding. The compatibility effects of SOG-02, SAG-008, and AX8900 on PLA/PCTG blends were investigated from their mechanical properties, thermal stabilities, melt flow rates, and crystallization behavior. Based on the results, SOG-02 showed the best compatibilizing effect on PLA/PCTG blends among the used compatibilizers. More importantly, it is worth noting that use of SOG-02 together with AX8900 further enhanced its compatibilizing effect on the PLA/PCTG blends with obvious improvements in mechanical properties and toughness. After blending with 3 wt% of SOG-02 and 2 wt% of AX8900, the tensile and bend strengths of PLA/PCTG/SOG-02/AX8900 were ~ 52.9 and ~ 67.2 MPa, respectively. In the meantime, the PLA/PCTG/SOG-02/AX8900 still kept benign notched impact strength (~ 6.3 MPa) and high elongation-at-break (~ 12.7%).


Polylactic acid Poly(1,4-cyclohexylene dimethylene terephthalate glycol) Compatibilization Mechanical property Crystallinity 



This work was financially supported by National Natural Science Foundation of China (No. 21673135) and Science and Technology Commission of Shanghai Municipality (No. 17020500700).


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Copyright information

© Iran Polymer and Petrochemical Institute 2019

Authors and Affiliations

  1. 1.Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, College of Environmental and Chemical EngineeringShanghai University of Electric PowerShanghaiChina
  2. 2.Shanghai Sunny New Technology Development Co. Ltd.ShanghaiChina
  3. 3.Shanghai Institute of Pollution Control and Ecological SecurityShanghaiChina

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