Document Type : Original research
Authors
1 Shanghai Key Laboratory of Multiphase Material Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
2 Sinopec Shanghai Petrochemical Co., Ltd
Abstract
A copolymerization reaction was carried out by adding different contents of 5-ethylidene-2-norbomene or cyclopentene to dicyclopentadiene (DCPD) using an optimized polymerization process. The effects of different amounts of the comonomers on the conversion, mechanical properties and thermal stability of the polymer products were investigated and compared. The results showed that the addition of 5-ethylidene-2-norbomene accelerated the reaction rate and had little effect on the overall conversion rate of the reaction, while the addition of cyclopentene decreased the reaction rate and conversion rate. The tensile modulus, tensile strength, flexural modulus and flexural strength of the copolymer showed a trend of increasing and then decreasing with the increase of the comonomers content, reaching a peak at 5wt% of 5-ethylidene-2-norbomene or 3wt% of cyclopentene. At this peak condition, its impact strength could be improved by 50% compared to DCPD homopolymer. Below this peak condition, the Tg and thermal stability of the copolymer did not change significantly.
Keywords
Main Subjects
- Long TR, Elder RM, Bain ED, Masser KA, Sirk TW, Jian HY, Knorr DB, Lenhart JL (2018) Influence of molecular weight between crosslinks on the mechanical properties of polymers formed via ring-opening metathesis. Soft Matter 14: 3344-3360
- Lee JK, Gould GL (2007) Polydicyclopentadiene based aerogel: a new insulation material. J Sol- Gel Sci Technol 44: 29-40
- Sherman LM (2002) Level sensors: Improved technology tightens your grip on materials inventory control. Plast Technol 48: 62-63
- Woodson CS, Grubbs RH (2000) Poly-merization of low grade DCPD monomers using an olefin metathesis catalyst. US Patent 6,020,443
- Constable GS, Lesser AJ, Coughlin EB (2004) Morphological and mechanical evaluation of hybrid organicInorganic thermoset copolymers of dicyclopentadiene and mono- or tris(norbornenyl)- substituted polyhedral oligomeric silsesquioxanes. Macromolecules 37: 1276-1282
- Leach DR (1987) Cycloolefin composition and method for making high TG fiber reinforced polymeric product US Patent 4,708,969
- Mathers RT, Damodaran K, Rendos MG (2009) Functional hyperbranched polymers using ring-opening metathesis polymerization of dicyclopentadiene with monoterpenes. Macromolecules 42: 1512-1518
- Wilson GO, Caruso MM, Schelkopf SR (2011) Adhesion promotion via noncovalent interactions in self-healing polymers. Acs Appl Mater Interfaces 3: 3072-3077
- Kovai S, Slugovc C (2020) Ring-opening metathesis polymerisation derived poly(dicyclo-pentadiene) based materials. Mater Chem Front 4:2235-2255
- RH Grubbs, AG Wenzel (2015) Handbook of Metathesis, Vol 1: Catalyst development and mechanism, 2nd Edition, Wiley-VCH, Ch.3, 71- 85
- Hejl A, Scherman OA, Grubbs RH (2005) Ring-opening metathesis polymerization of functionalized low-strain monomers with ruthenium-based catalysts. Macromolecules 38: 7214-7218
- Santos RJ, Teixeira AM, Lopes J (2005) Study of mixing and chemical reaction in RIM. Chem Eng Sci 60: 2381-2398
- Enrico A, Sergio F, Francesco G (2011) Process for producing ethylidene norbornene US Patent 20110137094 A1 2011/0137094 A1
- Fischer RH, Liang S, Pinkos R (2001) Method for producing cyclopentanone and cyclopentene- 1-carboxylic acid and their esters. US Patent 6,316,659
- Yang G, Mauldin TC, Lee JK (2015) Cure kinetics and physical properties of poly- (dicyclopentadiene/ 5-ethylidene-2-norbornene) initiated by different Grubbs' catalysts. RSC Adv 5: 59120-59130
- Larin GE, Bernklau N, Kessler MR (2006) Rheo kinetics of ring-opening metathesis polymerization of norbornene-based monomers intended for self-healing applications. Polym Eng Sci 46: 1804-1811
- Liu X, Kessler MR (2006) Characterization of diene monomers as healing agents for autonomic damage repair. J Appl Polym Sci 101: 1266-1272
- Huang GC, Lee JK, Kessler MR (2009) Adhesion strength of norbornene-based self-healing agents to an amine-cured epoxy. Proc SPIE 7493
- Yao Z, Cao K (2012) Ring-opening metathesis copolymerization of dicyclopentadiene and cyclopentene through reaction injection molding process. J Appl Polym Sci 125: 2489-2493
)
