Abstract
Ultraviolet (UV) curing kinetics of hyperbranched polysiloxane (HBP) initiated by 2-Hydroxy-2-methyl-1-[(4-isobutyl)phenyl]-1-propanone (Trade name: IHT-PI 185) was studied by using Differential Photo Calorimeter (DPC). The effects of photoinitiator concentration, UV irradiation intensity, environment temperature and atmosphere on curing behaviors were investigated. It was found that both curing rate (R) and ultimate vinyl conversion percentage (C) first increase and then tend to stabilize within 3 wt% of photoinitiator concentration. Higher UV irradiation intensity can lead to higher values of R and C. Particularly, R is proportional to the square root of irradiation intensity at initial stage. Although raising temperature could raise the values of R and C, the effect of temperature on R is not marked. Oxygen possesses a notable inhibition effect on curing, however, induction period can be reduced by enhancing irradiation intensity. Curing kinetics was studied using Ameliorated Autocatalytic Model attaching a diffusion term. It is found that the model is suitable to describe the autocatalysis effect at the initial stage and the termination stage controlled by diffusion process. The kinetic parameters including total apparent curing exponent and apparent activation energy calculated by model above are c.a. 6 and 13.15 KJ/mol, respectively.
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References
Andrzejewska E (2001) Prog Polym Sci 26:605
Chiou BS, Khan SA (1997) Macromolecules 30:7322
Jiguet S, Judelewicz M, Mischler S, Hofmann H, Bertsch A, Renaud P (2006) Surface & Coatings Technology 201:2289
Kong J, Fan XD, Zhang GB, Xie X, Si QF, Wang SJ (2006) Polymer 47:1519
Abe Y, Gunji T (2004) Prog Polym Sci 29:149
Zhang GB, Fan XD, Kong J, Liu YY, Wang SJ, Si QF (2007) Chem J Chinese Universities 28:1598
Karstedt BD, Scotia Y (1973) USA Patent, 3775452
Fisher JP, Dean D, Mikos AG (2002) Biomaterials 23:4333
Kong J, Fan XD, Si QF, Zhang GB et al (2006) J Polym Sci Part A: Polym Chem 44:3930
Anseth KS, Bowman CN, Pepas NA (1994) J Polym Sci Part A: Polym Chem 32:139
Jiang XS, Xu HJ, Yin J (2004) Polymer 45:133
Lecamp L, Youssef B, Bunel C (1997) Polymer 38:6089
Wang HY, Shi YT, Wei J, Jiang XS, Yin J (2006) J Appl Polm Sci 101:2347
Kou HG, Asif A, Shi WF (2003) J Appl Polm Sci 89:1500
Wen M, Scriven LE, Mccormick AV (2002) Macromolecules 35:112
Cho JD, Hong JW (2005) European Polymer Journal 41:367
Kim WG, Lee JY (2003) Polymer 44:6303
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Zhang, GB., Fan, XD., Kong, J. et al. Kinetic Study on UV-curing of Hyperbranched Polysiloxane . Polym. Bull. 60, 863–874 (2008). https://doi.org/10.1007/s00289-008-0912-z
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DOI: https://doi.org/10.1007/s00289-008-0912-z