Copyright (c) 2016 AJC
This work is licensed under a Creative Commons Attribution 4.0 International License.
Crystallization and Thermal Behaviour of Poly(3-hydroxybutyric acid)/Poly(vinyl acetate) Blend Films
Corresponding Author(s) : Olla Sharhan
Asian Journal of Chemistry,
Vol. 28 No. 3 (2016): Vol 28 Issue 3
Abstract
Blending of poly(3-hydroxybutyric acid) films with poly(vinyl acetate) was studied. The melting phase morphology and crystallization behaviour of the poly(3-hydroxybutyric acid) and poly(vinyl acetate) blends prepared by casting films have been studied by Fourier transform infrared (FT-IR), field emission scanning electron microscopy (FESEM) and differential scanning calorimetry (DSC). Likewise, there is no specific interaction between the two polymers was found by FTIR. In the blend the crystallization of poly(3-hydroxybutyric acid) was affected by the poly(vinyl acetate) component, particularly in their blends. The properties of poly(3-hydroxybutyric acid) were found to be improved by blending with poly(vinyl acetate) and the improvement is a function of the proportion of poly(vinyl acetate) in the blend. The thermal stability for the blends was more stable than the pure polymers. Thermogravmetric analysis (TGA) results showed three-step decomposition assigned to the thermal degradation of poly(3-hydroxybutyric acid) and poly(vinyl acetate). The melting temperatures of poly(3-hydroxybutyric acid) in the blends exhibited a slight shift. For the X-ray diffraction analysis, the crystallization rate was decreased by blending poly(3-hydroxybutyric acid) with poly(vinyl acetate).
Keywords
Download Citation
Endnote/Zotero/Mendeley (RIS)BibTeX
- A.M. Díez-Pascual and A.L. Díez-Vicente, Int. J. Mol. Sci., 15, 10950 (2014); doi:10.3390/ijms150610950.
- R.W. Lenz and R.H. Marchessault, Biomacromolecules, 6, 1 (2005); doi:10.1021/bm049700c.
- K.G. Satyanarayana, G.G.C. Arizaga and F. Wypych, Prog. Polym. Sci., 34, 982 (2009); doi:10.1016/j.progpolymsci.2008.12.002.
- M.C.M. Antunes and M.I. Felisberti, Polímeros, 15, 134 (2005); doi:10.1590/S0104-14282005000200014.
- L. Zhang, X.M. Deng, S.J. Zhao and Z.T.J. Huang, Appl. Polym. Sci., 65, 1849 (1997); doi:10.1002/(SICI)1097-4628(19970906)65:10<1849::AID-APP1>3.0.CO;2-F.
- S. Xu, R. Luo, L. Wu, K. Xu and G.-Q. Chen, J. Appl. Polym. Sci., 102, 3782 (2006); doi:10.1002/app.24742.
- G.R. Saad and H. Seliger, Polym. Degrad. Stab., 83, 101 (2004); doi:10.1016/S0141-3910(03)00230-1.
- L. Wang, W. Zhu, X. Wang, X. Chen, G.-Q. Chen and K. Xu, J. Appl. Polym. Sci., 107, 166 (2008); doi:10.1002/app.27004.
- P.J. Barham and A. Keller, J. Polym. Sci. Pol. Phys., 24, 69 (1986); doi:10.1002/polb.1986.180240108.
- L. Zhang, X. Deng, S. Zhao and Z. Huang, Polymer, 38, 6001 (1997); doi:10.1016/S0032-3861(97)00158-4.
- P.A. Holmes, Phys. Technol., 16, 32 (1985); doi:10.1088/0305-4624/16/1/305.
- M. Avella, E. Martuscelli and M. Raimo, J. Mater. Sci., 35, 523 (2000); doi:10.1023/A:1004740522751.
- S.H. Park, S.T. Lim, T.K. Shin, H.J. Choi and M.S. Jhon, Polymer, 42, 5737 (2001); doi:10.1016/S0032-3861(01)00071-4.
- S. Srilalitha, K. Jayaveera and S. Madhvendra, J. Eng. Sci., 2, 30 (2011).
- E. Chiellini and R. Solaro, Biodegrable Polymers and Plastics: Kluwer Academic Pub., Springer Science & Business Media (2003).
- G.Q. Chen, Q. Wu, K. Zhao, H.P. Yu and A.C. Chan, Chin. J. Polym. Sci., 18, 389 (2000).
- B. Immirzi, M. Malinconico, G. Orsello, S. Portofino and M.G. Volpe, J. Mater. Sci., 34, 1625 (1999); doi:10.1023/A:1004584802030.
- S.A. Madbouly, A.A. Mansour and N.Y. Abdou, Eur. Polym. J., 43, 3933 (2007); doi:10.1016/j.eurpolymj.2007.06.020.
- H. Huang, Y. Hu, J. Zhang, H. Sato, H. Zhang, I. Noda and Y. Ozaki, J. Phys. Chem. B, 109, 19175 (2005); doi:10.1021/jp0532162.
- Y. Azuma, N. Yoshie, M. Sakurai, Y. Inoue and R. Chûjô, Polymer, 33, 4763 (1992); doi:10.1016/0032-3861(92)90690-X.
- P. Ma, P. Xu, M. Chen, W. Dong, X. Cai, P. Schmit, A.B. Spoelstra and P.J. Lemstra, Carbohydr. Polym., 108, 299 (2014); doi:10.1016/j.carbpol.2014.02.058.
- M.-N. Kim, A.-R. Lee, K.-H. Lee, I.-J. Chin and J.-S. Yoon, Eur. Polym. J., 35, 1153 (1999); doi:10.1016/S0014-3057(98)00089-5.
- J.-S. Yoon, S.-H. Oh and M.-N. Kim, Polymer, 39, 2479 (1998); doi:10.1016/S0032-3861(97)00556-9.
- P. Xing, X. Ai, L. Dong and Z. Feng, Macromolecules, 31, 6898 (1998); doi:10.1021/ma980256d.
- A. Gonzalez, M. Iriarte, P.J. Iriondo and J.J. Iruin, Polymer, 43, 6205 (2002); doi:10.1016/S0032-3861(02)00493-7.
- M.K. Cheung, K.P.Y. Wan and P.H. Yu, J. Appl. Polym. Sci., 86, 1253 (2002); doi:10.1002/app.11091.
- G.Z. Ding, K. Cui and J.P. Liu, J. Appl. Polym. Sci., 122, 617 (2011); doi:10.1002/app.34188.
- E. El-Shafee, G.R. Saad and S.M. Fahmy, Eur. Polym. J., 37, 2091 (2001); doi:10.1016/S0014-3057(01)00097-0.
- H.J. Choi, S.H. Park, J.S. Yoon, H.S. Lee and S.J. Choi, Polym. Eng. Sci., 35, 1636 (1995); doi:10.1002/pen.760352010.
- A. Nikolova and R. Schnabel, J. Chem. Technol. Metall., 49, 494 (2014).
- L. Zhang, S.H. Goh, S.Y. Lee and G.R. Hee, Polymer, 41, 1429 (2000); doi:10.1016/S0032-3861(99)00320-1.
- E.D. Paglia, P.L. Beltrame, M. Canetti, A. Seves, B. Marcandalli and E. Martuscelli, Polymer, 34, 996 (1993); doi:10.1016/0032-3861(93)90220-5.
- E.E. Shafee, Eur. Polym. J., 38, 413 (2002); doi:10.1016/S0014-3057(01)00201-4.
- J.A. de Lima and M.I. Felisberti, Eur. Polym. J., 42, 602 (2006); doi:10.1016/j.eurpolymj.2005.09.004.
- P. Sadocco, C. Bulli, G. Elegir, A. Seves and E. Martuscelli, Makromol. Chem., 194, 2675 (1993); doi:10.1002/macp.1993.021941003.
- O. Miguel, J.L. Egiburu and J. Iruin, J. Polym., 42, 953 (2001); doi:10.1016/S0032-3861(00)00435-3.
- S. Takahashi, J.C. Hassler and E. Kiran, J. Supercrit. Fluids, 72, 278 (2012); doi:10.1016/j.supflu.2012.09.009.
- Y. Wada, N. Seko, N. Nagasawa, M. Tamada, K.-I. Kasuya and H. Mitomo, Radiat. Phys. Chem., 76, 1075 (2007); doi:10.1016/j.radphyschem.2006.11.008.
- P. Mousavioun, P.J. Halley and W.O.S. Doherty, Ind. Crops Prod., 50, 270 (2013); doi:10.1016/j.indcrop.2013.07.026.
- P. Mousavioun, Ph.D. Theses, Properties of Lignin and Poly(hydroxybutyrate) Blends, Queensland University of Technology. Queensland, Asutralia (2011).
- Y. He, N. Asakawa, T. Masuda, A. Cao, N. Yoshie and Y. Inoue, Eur. Polym. J., 36, 2221 (2000); doi:10.1016/S0014-3057(99)00279-7.
- Z. Qiu, T. Ikehara and T. Nishi, Polymer, 44, 2503 (2003); doi:10.1016/S0032-3861(03)00150-2.
- L. Zhang, X. Deng, S. Zhao and Z. Huang, Polym. Int., 44, 104 (1997); doi:10.1002/(SICI)1097-0126(199709)44:1<104::AID-PI812>3.0.CO;2-#.
- N.K. Sood, Biodegradable Blends of Poly(Lactic Acid) (PLA)/Polyhydroxy Butrate (PHB) Copolymer and its Effects on Rheological, Thermal and Mechanical Properties, University of Massachusetts Lowell, Ann Arbor, Retrieved from ProQuest Dissertations & Theses Full Text Database (2010).
- Z. Cai and Z. Wen, J. Mater. Sci., 42, 5886 (2007); doi:10.1007/s10853-007-1811-7.
- S.T. Lim, Y.H. Hyun, C.H. Lee and H.J. Choi, J. Mater. Sci. Lett., 22, 299 (2003); doi:10.1023/A:1022316732412.
- S.N. Lee, M.Y. Lee and W.H. Park, J. Appl. Polym. Sci., 83, 2945 (2002); doi:10.1002/app.10318.
- N. Lotti, M. Pizzoli, G. Ceccorulli and M. Scandola, Polymer, 34, 4935 (1993); doi:10.1016/0032-3861(93)90022-3.
- Y. Wada, H. Mitomo, K.-I. Kasuya, N. Nagasawa, N. Seko, A. Katakai and M. Tamada, J. Appl. Polym. Sci., 101, 3856 (2006); doi:10.1002/app.24189.
- S. Wong, R. Shanks and A. Hodzic, Macromol. Mater. Eng., 287, 647 (2002); doi:10.1002/1439-2054(200210)287:10<647::AID-MAME647>3.0.CO;2-7.
- M.S. Khan, U. Khalil and G. Nasar, J. Pak. Mater. Soc., 3, 22 (2009).
- D. Feldman and A. Barbalata, Synthetic Polymers: Technology, Properties, Applications, Chapman & Hall, London (1996).
- H.J. Choi, J.H. Kim, J. Kim and S.H. Park, Macromol. Symp., 119, 149 (1997); doi:10.1002/masy.19971190115.
- H.S. Lee, S.Y. Jin, C.S. Choi, S.J. Maing, H.J. Choi, H.-S. Lee and S.J. Choi, Eur. Polym. J., 29, 1359 (1993); doi:10.1016/0014-3057(93)90194-K.
- O. Sharhan, A.H. Yahaya and M. Nasef, Asian J. Chem., 27, 979 (2015); doi:10.14233/ajchem.2015.17839.
- Y. Doi, S. Kitamura and H. Abe, Macromolecules, 28, 4822 (1995); doi:10.1021/ma00118a007.
- G. Wu, B. Su, W. Zhang and C. Wang, Mater. Chem. Phys., 107, 364 (2008); doi:10.1016/j.matchemphys.2007.07.028.
- H.S. Mansur, C.M. Sadahira, A.N. Souza and A.A.P. Mansur, Mater. Sci. Eng. C, 28, 539 (2008); doi:10.1016/j.msec.2007.10.088.
- E.A. El-Hefian, M.M. Nasef and A.H. Yahaya, E-J. Chem., 8, 91 (2011); doi:10.1155/2011/969062.
- G. Sivalingam, R. Karthik and G. Madras, Polym. Degrad. Stab., 84, 345 (2004); doi:10.1016/j.polymdegradstab.2004.01.011.
- G. Sivalingam and G. Madras, J. Appl. Polym. Sci., 93, 1378 (2004); doi:10.1002/app.20587.
- S. Zulfiqar and S. Ahmad, Polym. Degrad. Stab., 71, 299 (2001); doi:10.1016/S0141-3910(00)00179-8.
- E.G. Crispim, I.T.A. Schuquel, A.F. Rubira and E.C. Muniz, Polymer, 41, 933 (2000); doi:10.1016/S0032-3861(99)00222-0.
- R. Baskaran, S. Selvasekarapandian, N. Kuwata, J. Kawamura and T. Hattori, Solid State Ion., 177, 2679 (2006); doi:10.1016/j.ssi.2006.04.013.
- D.S. Dias, M.S. Crespi, M. Kobelnik and C.A. Ribeiro, J. Therm. Anal. Calorim., 97, 581 (2009); doi:10.1007/s10973-009-0328-5.
- H.-J. Chiu, H.-L. Chen, T.-L. Lin and J.S. Lin, Macromolecules, 32, 4969 (1999); doi:10.1021/ma990304+.
- P. Mousavioun, G.A. George and W.O.S. Doherty, Polym. Degrad. Stab., 97, 1114 (2012); doi:10.1016/j.polymdegradstab.2012.04.004.
- M.A. Semsarzadeh and B. Ghalei, J. Membr. Sci., 401-402, 97 (2012); doi:10.1016/j.memsci.2012.01.035.
References
A.M. Díez-Pascual and A.L. Díez-Vicente, Int. J. Mol. Sci., 15, 10950 (2014); doi:10.3390/ijms150610950.
R.W. Lenz and R.H. Marchessault, Biomacromolecules, 6, 1 (2005); doi:10.1021/bm049700c.
K.G. Satyanarayana, G.G.C. Arizaga and F. Wypych, Prog. Polym. Sci., 34, 982 (2009); doi:10.1016/j.progpolymsci.2008.12.002.
M.C.M. Antunes and M.I. Felisberti, Polímeros, 15, 134 (2005); doi:10.1590/S0104-14282005000200014.
L. Zhang, X.M. Deng, S.J. Zhao and Z.T.J. Huang, Appl. Polym. Sci., 65, 1849 (1997); doi:10.1002/(SICI)1097-4628(19970906)65:10<1849::AID-APP1>3.0.CO;2-F.
S. Xu, R. Luo, L. Wu, K. Xu and G.-Q. Chen, J. Appl. Polym. Sci., 102, 3782 (2006); doi:10.1002/app.24742.
G.R. Saad and H. Seliger, Polym. Degrad. Stab., 83, 101 (2004); doi:10.1016/S0141-3910(03)00230-1.
L. Wang, W. Zhu, X. Wang, X. Chen, G.-Q. Chen and K. Xu, J. Appl. Polym. Sci., 107, 166 (2008); doi:10.1002/app.27004.
P.J. Barham and A. Keller, J. Polym. Sci. Pol. Phys., 24, 69 (1986); doi:10.1002/polb.1986.180240108.
L. Zhang, X. Deng, S. Zhao and Z. Huang, Polymer, 38, 6001 (1997); doi:10.1016/S0032-3861(97)00158-4.
P.A. Holmes, Phys. Technol., 16, 32 (1985); doi:10.1088/0305-4624/16/1/305.
M. Avella, E. Martuscelli and M. Raimo, J. Mater. Sci., 35, 523 (2000); doi:10.1023/A:1004740522751.
S.H. Park, S.T. Lim, T.K. Shin, H.J. Choi and M.S. Jhon, Polymer, 42, 5737 (2001); doi:10.1016/S0032-3861(01)00071-4.
S. Srilalitha, K. Jayaveera and S. Madhvendra, J. Eng. Sci., 2, 30 (2011).
E. Chiellini and R. Solaro, Biodegrable Polymers and Plastics: Kluwer Academic Pub., Springer Science & Business Media (2003).
G.Q. Chen, Q. Wu, K. Zhao, H.P. Yu and A.C. Chan, Chin. J. Polym. Sci., 18, 389 (2000).
B. Immirzi, M. Malinconico, G. Orsello, S. Portofino and M.G. Volpe, J. Mater. Sci., 34, 1625 (1999); doi:10.1023/A:1004584802030.
S.A. Madbouly, A.A. Mansour and N.Y. Abdou, Eur. Polym. J., 43, 3933 (2007); doi:10.1016/j.eurpolymj.2007.06.020.
H. Huang, Y. Hu, J. Zhang, H. Sato, H. Zhang, I. Noda and Y. Ozaki, J. Phys. Chem. B, 109, 19175 (2005); doi:10.1021/jp0532162.
Y. Azuma, N. Yoshie, M. Sakurai, Y. Inoue and R. Chûjô, Polymer, 33, 4763 (1992); doi:10.1016/0032-3861(92)90690-X.
P. Ma, P. Xu, M. Chen, W. Dong, X. Cai, P. Schmit, A.B. Spoelstra and P.J. Lemstra, Carbohydr. Polym., 108, 299 (2014); doi:10.1016/j.carbpol.2014.02.058.
M.-N. Kim, A.-R. Lee, K.-H. Lee, I.-J. Chin and J.-S. Yoon, Eur. Polym. J., 35, 1153 (1999); doi:10.1016/S0014-3057(98)00089-5.
J.-S. Yoon, S.-H. Oh and M.-N. Kim, Polymer, 39, 2479 (1998); doi:10.1016/S0032-3861(97)00556-9.
P. Xing, X. Ai, L. Dong and Z. Feng, Macromolecules, 31, 6898 (1998); doi:10.1021/ma980256d.
A. Gonzalez, M. Iriarte, P.J. Iriondo and J.J. Iruin, Polymer, 43, 6205 (2002); doi:10.1016/S0032-3861(02)00493-7.
M.K. Cheung, K.P.Y. Wan and P.H. Yu, J. Appl. Polym. Sci., 86, 1253 (2002); doi:10.1002/app.11091.
G.Z. Ding, K. Cui and J.P. Liu, J. Appl. Polym. Sci., 122, 617 (2011); doi:10.1002/app.34188.
E. El-Shafee, G.R. Saad and S.M. Fahmy, Eur. Polym. J., 37, 2091 (2001); doi:10.1016/S0014-3057(01)00097-0.
H.J. Choi, S.H. Park, J.S. Yoon, H.S. Lee and S.J. Choi, Polym. Eng. Sci., 35, 1636 (1995); doi:10.1002/pen.760352010.
A. Nikolova and R. Schnabel, J. Chem. Technol. Metall., 49, 494 (2014).
L. Zhang, S.H. Goh, S.Y. Lee and G.R. Hee, Polymer, 41, 1429 (2000); doi:10.1016/S0032-3861(99)00320-1.
E.D. Paglia, P.L. Beltrame, M. Canetti, A. Seves, B. Marcandalli and E. Martuscelli, Polymer, 34, 996 (1993); doi:10.1016/0032-3861(93)90220-5.
E.E. Shafee, Eur. Polym. J., 38, 413 (2002); doi:10.1016/S0014-3057(01)00201-4.
J.A. de Lima and M.I. Felisberti, Eur. Polym. J., 42, 602 (2006); doi:10.1016/j.eurpolymj.2005.09.004.
P. Sadocco, C. Bulli, G. Elegir, A. Seves and E. Martuscelli, Makromol. Chem., 194, 2675 (1993); doi:10.1002/macp.1993.021941003.
O. Miguel, J.L. Egiburu and J. Iruin, J. Polym., 42, 953 (2001); doi:10.1016/S0032-3861(00)00435-3.
S. Takahashi, J.C. Hassler and E. Kiran, J. Supercrit. Fluids, 72, 278 (2012); doi:10.1016/j.supflu.2012.09.009.
Y. Wada, N. Seko, N. Nagasawa, M. Tamada, K.-I. Kasuya and H. Mitomo, Radiat. Phys. Chem., 76, 1075 (2007); doi:10.1016/j.radphyschem.2006.11.008.
P. Mousavioun, P.J. Halley and W.O.S. Doherty, Ind. Crops Prod., 50, 270 (2013); doi:10.1016/j.indcrop.2013.07.026.
P. Mousavioun, Ph.D. Theses, Properties of Lignin and Poly(hydroxybutyrate) Blends, Queensland University of Technology. Queensland, Asutralia (2011).
Y. He, N. Asakawa, T. Masuda, A. Cao, N. Yoshie and Y. Inoue, Eur. Polym. J., 36, 2221 (2000); doi:10.1016/S0014-3057(99)00279-7.
Z. Qiu, T. Ikehara and T. Nishi, Polymer, 44, 2503 (2003); doi:10.1016/S0032-3861(03)00150-2.
L. Zhang, X. Deng, S. Zhao and Z. Huang, Polym. Int., 44, 104 (1997); doi:10.1002/(SICI)1097-0126(199709)44:1<104::AID-PI812>3.0.CO;2-#.
N.K. Sood, Biodegradable Blends of Poly(Lactic Acid) (PLA)/Polyhydroxy Butrate (PHB) Copolymer and its Effects on Rheological, Thermal and Mechanical Properties, University of Massachusetts Lowell, Ann Arbor, Retrieved from ProQuest Dissertations & Theses Full Text Database (2010).
Z. Cai and Z. Wen, J. Mater. Sci., 42, 5886 (2007); doi:10.1007/s10853-007-1811-7.
S.T. Lim, Y.H. Hyun, C.H. Lee and H.J. Choi, J. Mater. Sci. Lett., 22, 299 (2003); doi:10.1023/A:1022316732412.
S.N. Lee, M.Y. Lee and W.H. Park, J. Appl. Polym. Sci., 83, 2945 (2002); doi:10.1002/app.10318.
N. Lotti, M. Pizzoli, G. Ceccorulli and M. Scandola, Polymer, 34, 4935 (1993); doi:10.1016/0032-3861(93)90022-3.
Y. Wada, H. Mitomo, K.-I. Kasuya, N. Nagasawa, N. Seko, A. Katakai and M. Tamada, J. Appl. Polym. Sci., 101, 3856 (2006); doi:10.1002/app.24189.
S. Wong, R. Shanks and A. Hodzic, Macromol. Mater. Eng., 287, 647 (2002); doi:10.1002/1439-2054(200210)287:10<647::AID-MAME647>3.0.CO;2-7.
M.S. Khan, U. Khalil and G. Nasar, J. Pak. Mater. Soc., 3, 22 (2009).
D. Feldman and A. Barbalata, Synthetic Polymers: Technology, Properties, Applications, Chapman & Hall, London (1996).
H.J. Choi, J.H. Kim, J. Kim and S.H. Park, Macromol. Symp., 119, 149 (1997); doi:10.1002/masy.19971190115.
H.S. Lee, S.Y. Jin, C.S. Choi, S.J. Maing, H.J. Choi, H.-S. Lee and S.J. Choi, Eur. Polym. J., 29, 1359 (1993); doi:10.1016/0014-3057(93)90194-K.
O. Sharhan, A.H. Yahaya and M. Nasef, Asian J. Chem., 27, 979 (2015); doi:10.14233/ajchem.2015.17839.
Y. Doi, S. Kitamura and H. Abe, Macromolecules, 28, 4822 (1995); doi:10.1021/ma00118a007.
G. Wu, B. Su, W. Zhang and C. Wang, Mater. Chem. Phys., 107, 364 (2008); doi:10.1016/j.matchemphys.2007.07.028.
H.S. Mansur, C.M. Sadahira, A.N. Souza and A.A.P. Mansur, Mater. Sci. Eng. C, 28, 539 (2008); doi:10.1016/j.msec.2007.10.088.
E.A. El-Hefian, M.M. Nasef and A.H. Yahaya, E-J. Chem., 8, 91 (2011); doi:10.1155/2011/969062.
G. Sivalingam, R. Karthik and G. Madras, Polym. Degrad. Stab., 84, 345 (2004); doi:10.1016/j.polymdegradstab.2004.01.011.
G. Sivalingam and G. Madras, J. Appl. Polym. Sci., 93, 1378 (2004); doi:10.1002/app.20587.
S. Zulfiqar and S. Ahmad, Polym. Degrad. Stab., 71, 299 (2001); doi:10.1016/S0141-3910(00)00179-8.
E.G. Crispim, I.T.A. Schuquel, A.F. Rubira and E.C. Muniz, Polymer, 41, 933 (2000); doi:10.1016/S0032-3861(99)00222-0.
R. Baskaran, S. Selvasekarapandian, N. Kuwata, J. Kawamura and T. Hattori, Solid State Ion., 177, 2679 (2006); doi:10.1016/j.ssi.2006.04.013.
D.S. Dias, M.S. Crespi, M. Kobelnik and C.A. Ribeiro, J. Therm. Anal. Calorim., 97, 581 (2009); doi:10.1007/s10973-009-0328-5.
H.-J. Chiu, H.-L. Chen, T.-L. Lin and J.S. Lin, Macromolecules, 32, 4969 (1999); doi:10.1021/ma990304+.
P. Mousavioun, G.A. George and W.O.S. Doherty, Polym. Degrad. Stab., 97, 1114 (2012); doi:10.1016/j.polymdegradstab.2012.04.004.
M.A. Semsarzadeh and B. Ghalei, J. Membr. Sci., 401-402, 97 (2012); doi:10.1016/j.memsci.2012.01.035.