Provided is a polyorganosiloxane, wherein a value obtained by integrating dw/dlog(M) from 2.5log(M)3.1 is 0 to 10% of a value obtained by integrating dw/dlog(M) over the entire range of log (M) in a differential molecular weight distribution curve, wherein the differential molecular weight distribution curve is determined by gel permeation chromatography using the polystyrene calibration curve, has an x-axis showing a logarithmic value log(M) of a molecular weight M and has a y-axis showing dw/dlog(M) obtained by differentiating a concentration fraction w with respect to the logarithmic value log(M) of the molecular weight

The present invention relates to organic semiconductor compositions and organic semiconductor layers and devices comprising such organic semiconductor compositions. The invention is also concerned with methods of preparing such organic semiconductor compositions and layers and uses thereof. The invention has application particularly in the field of displays such as organic field effect transistors (OFETS), integrated circuits, organic light emitting diodes (OLEDS), photodetectors, organic photovoltaic (OPV) cells, sensors, lasers, memory elements and logic circuits.

The invention pertains to a process for processing a crude lactide comprising the steps of: separating a crude lactide stream comprising L-lactide, D-lactide, and meso-lactide in one or more steps to form a meso-lactide stream comprising at least 50 wt. % of meso-lactide (based on the total weight of lactide in the stream) and at least one purified lactide stream comprising L-lactide and/or D-lactide; oligomerizing the meso-lactide stream to form an oligomer-containing stream comprising lactic acid oligomers; and depolymerizing the oligomer-containing stream to form a product stream comprising meso-lactide, L-lactide and D-lactide. The invention also pertains to a process for producing a polylactide and to a process for producing a racemic mixture of (S)-lactic acid and (R)-lactic acid.

(Meth)acrylate-functionalized oligomers having a) an oligomeric backbone comprised of first segments and second segments and b) (meth)acrylate-functionalized end groups are provided. Such oligomers are useful as components of curable compositions. The first segments, second segments and (meth)acrylate-functionalized end groups are linked together by linking moieties derived from a polyisocyanate. The first segments are residues of a first segment precursor containing a plurality of repeating units and a plurality of isocyanate-reactive functional groups and having a number average molecular weight of at least 250 daltons. The second segments are residues of a second segment precursor, different from the first segment precursor, containing a plurality of repeating units and a plurality of isocyanate-reactive functional groups and having a number average molecular weight of at least 250 daltons. The first segment and the second segment exhibit a Hansen Solubility Parameter Distance Relative Energy Difference of at least about 4 and not more than about 9.