Synthesis, characterization and properties of a hyperbranched aromatic polyamide: poly(ABZAIA)

Abstract

A new layout of complementary logic circuits based on p‐channel carbon nanotube and n‐channel zinc oxide nanowire transistors is presented by Takhee Lee and co‐workers . The processing is a hybrid approach, combining advantageous characteristic functions for the modulation of the current and operating voltage in transistors through proton radiation‐generated charges, allowing a simple method of designing favorable logic circuits.

Preparation and Characterisation of Pd Nanoclusters in Hyperbranched Aramid Templates to be used in Homogeneous Catalysis

“…[17,18] As a model compound benzene-1,3,5-tricarboxylic acid tris-p-tolylamide (named M1,3,5, Figure 1b) was prepared from benzene-1,3,5-tricarboxylic acid chloride and p-aminotoluene according to a general synthetic procedure. [19] After recrystallisation in Hyperbranched aramids were prepared by direct polycondensation, following the procedure described elsewhere.…”

“…[19] After recrystallisation in Hyperbranched aramids were prepared by direct polycondensation, following the procedure described elsewhere. [17,18,20] The polymerisation conditions used for the preparation of the (A 2 þ B 3 ) polymers, taken in account in the present paper, are shown in Table 1.…”

Synthesis and Properties of Organosoluble Fluorinated Polyamides Bearing 2-2′-Thio-bis(4-methyl Phenoxy) Groups

“…Therefore, much effort has been made to increase the solubility and processability of rigid chain polymers. Introduction of flexibilizing groups [3][4][5], bulky lateral substituents [6][7][8], non-linear moieties [9,10], hyper-branched or dendritic architectures [11][12][13], and less symmetry, such as meta-or ortho-linkage [14,15], into the aromatic polymer main chains have been utilized to tune the polymer properties by the design and synthesis of new monomers. It is also well known that the incorporation of bulky CF 3 into polymers backbone results in an enhanced solubility and optical transparency together with a lowered dielectric constant which is attributed to low polarizability of the C-F bond and the increase in free volume [16][17][18][19].…”

Modification of bisphenol-A based bismaleimide resin (BPA-BMI) with an allyl-terminated hyperbranched polyimide (AT-PAEKI)

“…However, because the aliphatic polyester possesses low thermal stability and modulus, these systems showed significant compromise in either T g or modulus. Recently, a plethora of heat-resistance HBPs, such as hyperbranched PEK [7,9,[19][20][21], ether imide [10,[22][23][24][25][26][27], aromatic polyester [4,28] and aromatic polyamide [8,29,30], have been reported. Despite this great variety, no study on the toughening of epoxy or BMI resin with any of these HBPs has been reported.…”