Interpenetrating Polymer Networks Based on Hydrogenated Castor Oil–Isophorone Diisocyanate and Poly(butyl methacrylate)

2002 ◽  
Vol 75 (2) ◽  
pp. 369-373 ◽  
Author(s):  
Vilas. D. Athawale ◽  
Priti. S. Pillay
Keyword(s):  
Castor Oil ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Butyl Methacrylate ◽  
Isophorone Diisocyanate ◽  
Hydrogenated Castor Oil

Preparation, Damping and Thermal Properties of Castor Oil-Based Polyurethane/Poly(Methyl Methacrylate-Butyl Methacrylate-Styrene) Grafted Interpenetrating Polymer Networks

2015 ◽  
Vol 1096 ◽  
pp. 455-464
Author(s):  
Zhou Fang ◽  
Qing Zhi Dong
Keyword(s):  
Methyl Methacrylate ◽  
Castor Oil ◽  
Polymer Networks ◽  
Weight Ratio ◽  
Mechanical Tests ◽  
Interpenetrating Polymer Networks ◽  
Butyl Methacrylate ◽  
Structural Damping ◽  
Poly Methyl Methacrylate ◽  
Damping Materials

A series of castor oil-based polyurethane (PU)/poly (methyl methacrylate-butyl methacrylate-styrene) (PA) grafted interpenetrating polymer networks (IPNs) were prepared. The effect of composition of the IPNs on the damping, thermal and mechanical properties were studied systematically. PU/PA (60:40, weight ratio) IPNs with methyl methacrylate/butyl methacrylate/styrene (MMA/BMA/St = 80/10/10, weight ratio). In the paper castor oil (CO) was used as PU’s branch units, the damping properties affected by the branch units ratio (ρ) were studied. Mechanical tests showed the tensile strength of the IPNs was improved after increasing the ρ value and PA content. The thermal stability was improved by incorporating heterocyclic imide rings into the PU molecular chains using isocyanate reacting with pyromellitic dianhydride (PMDA). It was found that the IPN composition with ρ value = 0.2 and PU/PA = 60:40 would be useful as structural damping materials, having tanδ values higher than 0.3 for a temperature range of 102°C (5.0-106.9°C).

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