Publication: Synergistic Effect of Talc and Titanium Dioxide on Poly(lactic acid) Crystallization: An Investigation on the Injection Molding Cycle Time Reduction
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Issued Date
2019
Resource Type
File Type
application/pdf
ISSN
15662543
Other identifier(s)
2-s2.0-85061604548
Rights Holder(s)
มหาวิทยาลัยศรีนครินทรวิโรฒ
Bibliographic Citation
Journal of Polymers and the Environment. Vol 27, No.4 (2019), p.837-846
Suggested Citation
Petchwattana N., Narupai B. Synergistic Effect of Talc and Titanium Dioxide on Poly(lactic acid) Crystallization: An Investigation on the Injection Molding Cycle Time Reduction. Journal of Polymers and the Environment. Vol 27, No.4 (2019), p.837-846. doi:10.1007/s10924-019-01396-0 Retrieved from: https://hdl.handle.net/20.500.14740/5376
Author(s)
Abstract
Injection molding cycle time is one of very important parameters relating to the plastic production rate. In neat poly(lactic acid) (PLA), it requires more than 25 min to obtain its half crystallinity (t 1/2 ). This indicates that the injection molding of neat PLA with high degree of crystallinity (X c ) and high production rate is impossible. This research aims to increase the crystallization rate of PLA by combining two inorganic fillers namely; titanium dioxide (TiO 2 ) and talc. Differential scanning calorimetry (DSC) study indicated that the t 1/2 of PLA decreased from 27 min to < 81 s, while the X c increased by around 16% with the adition of TiO 2 . Modifying PLA with talc was found to reduce t 1/2 down to 36 s and the X c increased from 0.92 to 20% only at a heating rate of 1 °C/min. The combination of talc and TiO 2 was significantly increased the X c for all cooling rates applied. Synergistic crystallization behavior was clearly observed when TiO 2 was added to PLA/talc for all TiO 2 concentrations. Minimum t 1/2 of 18 s was observed together with the increased X c by around 26% when TiO 2 was added to PLA/talc at 3 wt%. This reduced the injection cycle time from around 28 min, in neat PLA, down to 68 s at this TiO 2 content. With the presence of talc and TiO 2 , the flexural modulus of the composites was improved significantly. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.
Subject(s)
Biodegradable polymers
Crystallinity
Crystallization
Differential scanning calorimetry
Lactic acid
Oxides
Polymer matrix composites
Talc
Titanium dioxide
Crystallization behavior
Crystallization rates
Degree of crystallinity
High production rate
Molding cycles
Nucleating agents
Synergistic effect
Titanium dioxides (TiO2)
Injection molding
Composite
Crystallization
Manufacturing
Nucleation
Polymer
Synergism
Talc
Titanium
Crystallinity
Crystallization
Differential scanning calorimetry
Lactic acid
Oxides
Polymer matrix composites
Talc
Titanium dioxide
Crystallization behavior
Crystallization rates
Degree of crystallinity
High production rate
Molding cycles
Nucleating agents
Synergistic effect
Titanium dioxides (TiO2)
Injection molding
Composite
Crystallization
Manufacturing
Nucleation
Polymer
Synergism
Talc
Titanium