Favorable formation of stereocomplex crystals in long-chain branched poly(L-lactic acid)/poly(D-lactic acid) blends: impacts of melt effect and molecular chain structure
Source abstract
Abstract
A feasible approach is proposed to promote the formation of the stereocomplex crystal (Sc) in long-chain branched Poly(L-lactic acid)/Poly(D-lactic acid) (LCBPLA/PDLA) blends with hydrogen bond interactions. The synergistic effect of PDLA and long-chain branches significantly increases the crystalline ability of Sc from 20.1 to 30.4% due to the improved intermolecular crystal nucleation/growth. The frequency-independent loss tangent appeared at a PDLA concentration of 5.0 wt%, indicating a transition from the liquid-like to solid-like viscoelastic and the formation of a network composed of long-chain branches and the reserved Sc crystallites. Changing the processing temperatures from 190 to 230 °C seems to induce different melting behavior of Sc with diverse topological conformations so as to act as a template to attract PLLA molecule chains to perform the crystallization behavior. In situ wide-angle X-ray diffraction analysis reveals that a higher cooling temperature (less than 220 °C) significantly contributes to the Sc with more integrated structures and the Hc-to-Sc transition. The polarizing optical microscope results show that increasing the PDLA content and long-chain branched points significantly promote the spherulite growth and nuclei density of Sc, increasing the Sc size from 56.47 to 94.13 μm and nuclei density from 52.2 to 98.3%.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: biodegradable polymer synthesis and properties · Polymer crystallization and properties · Microplastics and Plastic Pollution
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (42)
Show source-provided references
1. Jin Z, Yin HM, Hsiao BS, Zhong GJ, Li ZM (2014) Biodegradable Poly(lactic Acid)/Hydroxyl Apatite 3d Porous Scaffolds using high-pressure molding and salt leaching. J Mater Sci 49:1648–1658. https://doi.org/10.1007/s10853-013-7848-x10.1007/s10853-013-7848-x ↗
2. Zhao ZG, Yang Q, Coates PD, Whiteside B, Kelly AL, Huang Y, Wu PP (2018) Structure and property of microinjection moulded Poly (lactic Acid) with high degree of long chain branching. Ind Eng Chem Res 57:11312–11322. https://doi.org/10.1021/acs.iecr.8b0159710.1021/acs.iecr.8b01597 ↗
3. Wang Y, Lei M, Wei Q, Wang Y, Zhang J, Guo Y, Saroia J (2020) 3D printing biocompatible L-Arg/Gnps/PLA nanocomposites with enhanced mechanical property and thermal stability. J Mater Sci 55:5064–5078. https://doi.org/10.1007/s10853-020-04353-810.1007/s10853-020-04353-8 ↗
4. Wang L, Jing X, Cheng H, Hu X, Yang L, Huang Y (2012) Rheology and crystallization of long-chain branched poly (L-Lactide) S with controlled branch length. Ind Eng Chem Res 51:10731–10741. https://doi.org/10.1021/ie300524j10.1021/ie300524j ↗
5. Hu W, Zhang Y, Qi Y, Wang H, Liu B, Zhao Q, Zhang J, Duan J, Zhang L, Sun Z, Liu B (2020) Improved mechanical properties and flame retardancy of wood/pla all-degradable biocomposites with novel lignin-based flame retardant and tgic. Macro Mater Eng 305:1900840. https://doi.org/10.1002/mame.20190084010.1002/mame.201900840 ↗
6. Liu J, Lou L, Yu W, Liao R, Li R, Zhou C (2010) Long chain branching polylactide: structures and properties. Polymer 51:5186–5197. https://doi.org/10.1016/j.polymer.2010.09.00210.1016/j.polymer.2010.09.002 ↗
7. Li Z, Zhao X, Lin Y, Coates P, Caton-Rose F, Martyn M (2015) Structure and blood compatibility of highly oriented poly( L-lactic acid) chain extended by Ethylene Glycol Diglycidyl Ether. Polymer 56:523–534. https://doi.org/10.1016/j.polymer.2014.11.03510.1016/j.polymer.2014.11.035 ↗
8. Hirata M, Kimura Y (2008) Thermomechanical properties of stereoblock Poly (lactic acid) s with different PLLA/PDLA block compositions. Polymer 49:2656–2661. https://doi.org/10.1016/j.polymer.2008.04.01410.1016/j.polymer.2008.04.014 ↗
9. He Y, Xu Y, Wei J, Fan Z, Li S (2008) Unique crystallization behavior of Poly (L-Lactide)/Poly (D-Lactide) stereocomplex depending on initial melt states. Polymer 49:5670–5675. https://doi.org/10.1016/j.polymer.2008.10.02810.1016/j.polymer.2008.10.028 ↗
10. Sarasua J, Arraiza AL, Balerdi P, Maiza I (2005) Crystallization and thermal behaviour of optically pure Polylactides and their blends. J Mater Sci 40:1855–1862. https://doi.org/10.1007/s10853-005-1204-810.1007/s10853-005-1204-8 ↗
11. Tsuji H, Horii F, Hyon SH, Ikada Y (1991) Stereocomplex formation between Enantiomeric Poly (Lactic Acid) S. 2 stereocomplex formation in concentrated solutions. Macromolecules 24:2719–2724. https://doi.org/10.1021/ma00010a01310.1021/ma00010a013 ↗
12. Tsuji H, Hyon SH, Ikada Y (1992) Stereocomplex formation between Enantiomeric Poly (Lactic Acids). 5. calorimetric and morphological studies on the stereocomplex formed in Acetonitrile Solution. Macromolecules 25:2940–2946. https://doi.org/10.1021/ma00037a02410.1021/ma00037a024 ↗
13. Tsuji H, Ikada Y (1996) Crystallization from the melt of Poly (Lactide) S with different optical purities and their blends. Macro Chem Phy 197:3483–3499. https://doi.org/10.1002/macp.1996.02197103310.1002/macp.1996.021971033 ↗
14. Purnama P, Jung Y, Kim SH (2012) Stereocomplexation of Poly(L-Lactide) and random copolymer Poly(D-Lactide-Co-Ε-Caprolactone) to enhance melt stability. Macromolecules 45:4012–4014. https://doi.org/10.1021/ma202814c10.1021/ma202814c ↗
15. Biela T, Duda A, Penczek S (2006) Enhanced melt stability of star-shaped stereocomplexes as compared with linear stereocomplexes. Macromolecules 39:3710–3713. https://doi.org/10.1021/ma060264r10.1021/ma060264r ↗
16. Bao RY, Yang W, Wei XF, Xie BH, Yang MB (2014) Enhanced formation of stereocomplex crystallites of high molecular weight poly (L-Lactide)/poly (D-Lactide) blends from melt by using poly (Ethylene Glycol). ACS Sustain Chem Engi 2:2301–2309. https://doi.org/10.1021/sc500464c10.1021/sc500464c ↗
17. Tsuji H, Sugimoto S (2015) Accelerated stereocomplex crystallization of poly(L-Lactide)/poly(D-Lactide) blends by long terminal linear alkyl groups. Macro Mater Eng 300:391–402. https://doi.org/10.1002/mame.20140040110.1002/mame.201400401 ↗
18. Pan P, Han L, Bao J, Xie Q, Shan G, Bao Y (2015) Competitive stereocomplexation, homocrystallization, and polymorphic crystalline transition in poly (L-Lactic Acid)/poly (D-Lactic acid) racemic blends: molecular weight effects. J Phy Chem B 119:6462–6470. https://doi.org/10.1021/acs.jpcb.5b0354610.1021/acs.jpcb.5b03546 ↗
19. Han L, Pan P, Shan G, Bao Y (2015) Stereocomplex crystallization of high-molecular-weight Poly (L-Lactic Acid)/Poly (D-Lactic Acid) racemic blends promoted by a selective nucleator. Polymer 63:144–153. https://doi.org/10.1016/j.polymer.2015.02.05310.1016/j.polymer.2015.02.053 ↗
20. Brochu S, Prud’Homme RE, Barakat I, Jerome R (1995) Stereocomplexation and morphology of polylactides. Macromolecules 28:5230–5239. https://doi.org/10.1021/ma00119a01010.1021/ma00119a010 ↗
21. Bao RY, Yang W, Jiang WR, Liu ZY, Xie BH, Yang MB, Fu Q (2012) Stereocomplex formation of high-molecular-weight Polylactide: a low temperature approach. Polymer 53:5449–5454. https://doi.org/10.1016/j.polymer.2012.09.04310.1016/j.polymer.2012.09.043 ↗
22. Bao RY, Yang W, Jiang WR, Liu ZY, Xie BH, Yang MB (2013) Polymorphism of Racemic Poly(L-Lactide)/Poly(D-Lactide) blend: effect of melt and cold crystallization. J Phy Chem B 117:3667–3674. https://doi.org/10.1021/jp311878f10.1021/jp311878f ↗
23. Badrinarayanan P, Dowdy KB, Kessler MR (2010) A Comparison of crystallization behavior for melt and cold crystallized Poly (-Lactide) using rapid scanning rate calorimetry. Polymer 51:4611–4618. https://doi.org/10.1016/j.polymer.2010.08.01410.1016/j.polymer.2010.08.014 ↗
24. Wasanasuk K, Tashiro K (2011) Structural regularization in the crystallization process from the glass or melt of Poly(L-Lactic Acid) viewed from the temperature-dependent and time-resolved measurements of Ftir and wide-angle/small-angle x-ray scatterings. Macromolecules 44:9650–9660. https://doi.org/10.1021/ma201766610.1021/ma2017666 ↗
25. Bing N, Tian N, Lv R, Li Z, Xu W, Qiang F (2010) Evidence of sequential ordering during cold crystallization of Poly (-Lactide). Polymer 51:563–567. https://doi.org/10.1016/j.polymer.2009.11.06410.1016/j.polymer.2009.11.064 ↗
26. Vasanthan N, Ly H, Ghosh S (2011) Impact of nanoclay on isothermal cold crystallization kinetics and polymorphism of Poly(L-Lactic Acid) nanocomposites. J Phy ChemB 115:9556. https://doi.org/10.1021/jp203322d10.1021/jp203322d ↗
27. Cartier L, Okihara T, Lotz B (1997) Triangular polymer single crystals: stereocomplexes, twins, and frustrated structures. Macromolecules 30:6313–6322. https://doi.org/10.1021/ma970799810.1021/ma9707998 ↗
28. Rahman N, Kawai T, Matsuba G, Nishida K, Kanaya T, Watanabe H, Okamoto H, Kato M, Usuki A, Matsuda M (2009) Effect of Polylactide Stereocomplex on the crystallization behavior of Poly(L-lactic acid). Macromolecules 42:4739–4745. https://doi.org/10.1021/ma900004d10.1021/ma900004d ↗
29. Zhou KY, Li JB, Wang HX, Wang JR (2017) Effect of star-shaped chain architectures on the polylactide stereocomplex crystallization behaviors. C J Polym Sci 35:974–991. https://doi.org/10.1007/s10118-017-1935-410.1007/s10118-017-1935-4 ↗
30. Wei XF, Bao RY, Cao ZQ, Yang W, Xie BH, Yang MB (2012) Stereocomplex crystallite network in asymmetric Plla/Pdla blends: formation, structure, and confining effect on the crystallization rate of homocrystallites. Macromolecules 47:1439–1448. https://doi.org/10.1021/ma402653a10.1021/ma402653a ↗
31. Du F, Scogna RC, Zhou W, Brand S, Fischer JE, Winey KI (2004) Nanotube networks in polymer nanocomposites: rheology and electrical conductivity. Macromolecules 37:9048–9055. https://doi.org/10.1021/ma049164g10.1021/ma049164g ↗
32. Xu Z, Niu Y, Wang Z, Li H, Yang L, Qiu J, Wang H (2011) Enhanced nucleation rate of polylactide in composites assisted by surface acid oxidized carbon nanotubes of different aspect ratios. ACS Appl Mater Inter 3:3744–375310.1021/am200932q ↗
33. Xu Z, Niu Y, Yang L, Xie W, Li H, Gan Z, Wang Z (2010) Morphology, rheology and crystallization behavior of polylactide composites prepared through addition of five-armed star polylactide grafted multiwalled carbon nanotubes. Polymer 51:730–737. https://doi.org/10.1016/j.polymer.2009.12.01710.1016/j.polymer.2009.12.017 ↗
34. Liu C, Zhang J, He J, Hu G (2003) Gelation in carbon nanotube/polymer composites. Polymer 44:7529–7532. https://doi.org/10.1016/j.polymer.2003.09.01310.1016/j.polymer.2003.09.013 ↗
35. Horst RH, Winter HH (2000) Stable critical gels of a copolymer of Ethene and 1-Butene achieved by partial melting and recrystallization. Macromolecules 33:7538–7543. https://doi.org/10.1021/ma000361z10.1021/ma000361z ↗
36. Huang S, Liu Z, Yin C, Gao Y, Wang Y, Yang M (2012) Gelation of Attractive Particles in Polymer Melt. Polymer 53:4293–4299. https://doi.org/10.1016/j.polymer.2012.07.05410.1016/j.polymer.2012.07.054 ↗
37. Hu W, Frenkel D, Mathot VB (2003) Intramolecular nucleation model for polymer crystallization. Macromolecules 36:8178–8183. https://doi.org/10.1021/ma034428510.1021/ma0344285 ↗
38. Liu Z, Chen Y, Ding W, Zhang C (2015) Filling behavior, morphology evolution and crystallization behavior of microinjection molded poly (Lactic Acid)/Hydroxyapatite nanocomposites. Compos Part A-Appl Science Manuf 72:85–95. https://doi.org/10.1016/j.compositesa.2015.02.00210.1016/j.compositesa.2015.02.002 ↗
39. Yamane H, Sasai K (2003) Effect of the addition of poly (D-Lactic Acid) on the thermal property of poly (L-Lactic Acid). Polymer 44:2569–2575. https://doi.org/10.1016/S0032-3861(03)00092-210.1016/S0032-3861(03)00092-2 ↗
40. Fillon B, Thierry A, Lotz B, Wittmann J (1994) Efficiency scale for polymer nucleating agents. J Therm Analy 42:721–731. https://doi.org/10.1007/BF0254674510.1007/BF02546745 ↗
41. Fillon B, Wittmann J, Lotz B, Thierry A (1993) Self-nucleation and recrystallization of isotactic polypropylene (α phase) investigated by differential scanning calorimetry. J Polym Sci Part B Polymr Phy 31:1383–1393. https://doi.org/10.1002/polb.1993.09031101310.1002/polb.1993.090311013 ↗
42. Wu PP, Yang Q, Zhao ZZ, Zhang TY, Huang YJ, Liao X (2018) Realizing simultaneous toughening and reinforcement in polypropylene blends via solid die-drawing. Polymer 161:109–121. https://doi.org/10.1016/j.polymer.2018.12.01110.1016/j.polymer.2018.12.011 ↗