Abstract
Triethyl citrate (TEC) and acetyl tributyl citrate (ATBC) were used as plasticizer for poly(lactic acid) (PLA). The treated and plasticized PLA at various concentrations were analyzed by differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and opacity. DSC was used to evaluate the crystallinity and thermal property of all the samples. It was found that the glass transition temperature (Tg) and the melting temperature (Tm) decreased as the amount of citrate esters increased. Additionally, the presence of TEC or ATBC tended to increase the crystallinity of PLA. This result was supported by XRD. DMA of plasticized PLA indicates that a decrease in Tg is obtained with increasing plasticizer content. FTIR spectra indicate that there are some molecular interactions by intermolecular hydrogen bonds between PLA and citrate esters. The effect of the concentration of plasticizer on the opacity of the films was negligible.
References
[1] Sodergard A, Stolt M. Prog. Polym. Sci. 2002, 27, 1123–1163.10.1016/S0079-6700(02)00012-6Search in Google Scholar
[2] Baiardo M, Frisoni G, Scandola M, Rimelen M, Lips D, Ruffieux K, Wintermantel E. J. Appl. Polym. Sci. 2003, 90, 1731–1738.10.1002/app.12549Search in Google Scholar
[3] Nijenhuis AJ, Colstee E, Grijpma DW, Pennings AJ. Polymer 1996, 37, 5849–5857.10.1016/S0032-3861(96)00455-7Search in Google Scholar
[4] Gajria AM, Dave V, Gross RAP, McCarthy S. Polymer 1996, 37, 437–444.10.1016/0032-3861(96)82913-2Search in Google Scholar
[5] Mascia L, Xanthos M. Adv. Polym. Technol. 1992, 11, 237–248.10.1002/adv.1992.060110402Search in Google Scholar
[6] Eguiburu JL, Iruin JJ, Fernandez-Berridi MJ, Roman JS. Polymer 1998, 39, 6891–6897.10.1016/S0032-3861(98)00182-7Search in Google Scholar
[7] Loudin D, Bizot H, Colonna P. J. Appl. Polym. Sci. 1997, 63, 1047–1053.10.1002/(SICI)1097-4628(19970222)63:8<1047::AID-APP11>3.0.CO;2-3Search in Google Scholar
[8] Auras R, Harte B, Selke S. Macromol. Biosci. 2004, 4, 835–864.10.1002/mabi.200400043Search in Google Scholar
[9] Hassouna F. Raquez J-M, Addiego F, Dubois P, Toniazzo V, Ruch D. Eur. Polym. J. 2011, 47, 2134–2144.10.1016/j.eurpolymj.2011.08.001Search in Google Scholar
[10] Hassouna F, Raquez J-M, Addiego F, Dubois P, Toniazzo V, Ruch D. Eur. Polym. J. 2012, 48, 404–415.10.1016/j.eurpolymj.2011.12.001Search in Google Scholar
[11] Martin O, Averous L. Polymer 2001, 42, 6209–6219.10.1016/S0032-3861(01)00086-6Search in Google Scholar
[12] Lui H, Zhang J. J. Polym. Sci. Part B: Polym. Phys. 2011, 49, 1051–1083.10.1002/polb.22283Search in Google Scholar
[13] Ljungberg N, Wesslén B. Biomacromolecules 2005, 6, 1789–1796.10.1021/bm050098fSearch in Google Scholar
[14] Labrecque LV, Kumar RA, Davé V, Gross RA, Mccarthy SP. J. Appl. Polym. Sci. 1997, 66, 1507–1513.10.1002/(SICI)1097-4628(19971121)66:8<1507::AID-APP11>3.0.CO;2-0Search in Google Scholar
[15] Jacobsen S, Fritz HG. Polym. Eng. Sci. 1999, 39, 1303–1310.10.1002/pen.11517Search in Google Scholar
[16] Ljungberg N, Andersson T, Wesslén B. J. Appl. Polym. Sci. 2003, 88, 3239–3247.10.1002/app.12106Search in Google Scholar
[17] Ljungberg N, Wesslén B. J. Appl. Polym. Sci. 2002, 86, 1227–1234.10.1002/app.11077Search in Google Scholar
[18] Murariu M, Ferreira AS, Alexandre M, Dubois P. Polym. Adv. Technol. 2008, 19, 636–646.10.1002/pat.1131Search in Google Scholar
[19] Tsou CH, Suen MC, Yao WH, Yeh JT, Wu CS, Tsou CY, Chiu SH, Chen JC, Wang RY, Lin SM, Hung WS, Guzman MD, Hu CC, Lee KR. Materials 2014, 7, 5617–5632.10.3390/ma7085617Search in Google Scholar
[20] Courgneau C, Ducruet V, Avérous L, Grenet J, Domenek S. Polym. Eng. Sci. 2013, 53, 1085–1098.10.1002/pen.23357Search in Google Scholar
[21] Tanrattanakul V, Bunkaew P. eXPRESS Polym. Lett. 2014, 8, 387–396.10.3144/expresspolymlett.2014.43Search in Google Scholar
[22] Ren Z, Dong L, Yang Y. J. Appl. Polym. Sci. 2006, 101, 1583–1590.10.1002/app.23549Search in Google Scholar
[23] Oyama, HT. Polymer 2009, 50, 747–751.10.1016/j.polymer.2008.12.025Search in Google Scholar
[24] Suryanegara L, Nakagaito AN, Yano H. Comp. Sci. Technol. 2009, 69, 1187–1192.10.1016/j.compscitech.2009.02.022Search in Google Scholar
[25] Harte I, Birkinshaw C, Jones E, Kennedy J, DeBarra E. J. Appl. Polym. Sci. 2013, 127, 1997–2003.10.1002/app.37600Search in Google Scholar
[26] Vieira MGA, da Silva MA, dos Santos LO, Beppu MM. Eur. Polym. J. 2011, 47, 254–263.10.1016/j.eurpolymj.2010.12.011Search in Google Scholar
[27] Kaavessina M, Ali I, Elleithy R, Al-Zahrani SM. J. Elast. Plast. 2014, 46, 253–268.10.1177/0095244312468364Search in Google Scholar
[28] Brostow W, Chiu R, Kalogeras IM, Vassilikou-Dova A. Mater. Lett. 2008, 62, 3152–3155.10.1016/j.matlet.2008.02.008Search in Google Scholar
[29] Averous L, Moro L, Dole P, Fringant C. Polymer 2000, 41, 4157–4167.10.1016/S0032-3861(99)00636-9Search in Google Scholar
[30] Ristic IS, Tanasic L, Nikolic LB, Cakic SM, Ilic OZ, Radicevic RZ, Budinski-Simendic JK. J. Polym. Environ. 2011, 19, 419–430.10.1007/s10924-011-0297-1Search in Google Scholar
[31] Haafiz MKM, Hassan A, Zakaria Z, Inuwa IM, Islam MS, Jawaid M. Carbohydr. Polym. 2013, 98, 139–145.10.1016/j.carbpol.2013.05.069Search in Google Scholar PubMed
[32] Orozco VH, Brostow W, Chonkaew W, Lόpez BL. Macromol. Symp. 2009, 277, 69–80.10.1002/masy.200950309Search in Google Scholar
[33] Yeh J, Tsou C, Li Y, Xiao H, Wu C, Chai W, Lai YC, Wang CK. J. Polym. Res. 2012, 19, 9766–9775.10.1007/s10965-011-9766-4Search in Google Scholar
[34] Katiyar V, Nanavati H. Polym. Chem. 2010, 1, 1491–1500.10.1039/c0py00125bSearch in Google Scholar
[35] Yew GH, Yusof AM, Ishak ZA, Ishiaku US. Polym. Degrad. Stab. 2005, 90, 488–500.10.1016/j.polymdegradstab.2005.04.006Search in Google Scholar
[36] Silverajah VSG, Ibrahim NA, Zainuddin N, Yunus WMZW, Hassan HA. Molecules 2012, 17, 11729–11747.10.3390/molecules171011729Search in Google Scholar PubMed PubMed Central
[37] Siripatrawan U, Harte BR. Food Hydrocolloids 2010, 24, 770–775.10.1016/j.foodhyd.2010.04.003Search in Google Scholar
[38] Ho KLG, Pometto AL. J. Environ. Polym. Degrad. 1999, 7, 93–100.10.1023/A:1021860301487Search in Google Scholar
[39] Shirai MA, Grossmann MVE, Mali S, Yamashita F, Garcia PS, Müller CMO. Carbohydr. Polym. 2013, 92, 19–22.10.1016/j.carbpol.2012.09.038Search in Google Scholar PubMed
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