Synthesis and characterization of new polyimides containing pendent pentadecyl chains

High solubility and optical transparency of novel polyimides containing 3,3′,5,5′-tetramethyl pendant groups and 4-tert-butyltoluene moiety

“…To overcome these problems, much research effort have been focused on the synthesis of soluble and optically transparent PIs without much deterioration of their own excellent properties. Several successful approaches including insertion of flexible linkage and bulky substituents on the main chain or utilization of noncoplanar or unsymmetrical monomers have been developed [10][11][12][13][14][15][16].…”

Novel fluorinated polyimides derived from 9,9-bis(4-amino-3,5-difluorophenyl)fluorene and aromatic dianhydrides

“…Many attempts have been made to improve the processability of PIs without sacrificing their thermal and mechanical properties. During the past decades, some progress has been made in the chemical modification of the parent PIs structure to get more soluble polymer derivatives, for example, introducing the flexible linkages or geometrically asymmetric units, bulky lateral groups or noncoplanar structures into the polymer backbone [8][9][10][11][12][13][14][15]. It also has been demonstrated that incorporation of a cyclic side cardo group, such as a fluorene, a phenylcyclohexane, or an adamantane group, into the macromolecular backbone was quite effective to improve the solubility of PIs without deteriorating their inherent excellent properties [16][17][18][19][20][21][22].…”

Pharmacological properties of cashew (Anacardium occidentale)

“…Derivatives of polymers and resins (Jaillet et al, 2014) can be incorporated as anti-corrosion, waterproof, flame retardants, surface coating, and rubber friction modification materials (Chuayjuljit et al, 2007). The resins obtained from the CNSL are considered as flexible and have greater solubility in organic solvents, thus may be used as resistance to bases and acids (Sadavarte et al, 2009). Cardanol are also used for reducing brittleness and improving the flexibility of the blades (Blazdell, 2000).…”