Abstract: A chemical mechanical polishing pad comprising a photocured polymer wherein the photocured polymer is the photoinitiated reaction product of a photocurable material comprising molecules having two or more functional groups wherein the functional groups include a thiol group and an ethylenically unsaturated group, provided for at least a portion of the molecules having the ethylenically unsaturated group, the ethylenically unsaturated group is a (meth)acrylate group, wherein the (meth)acrylate groups comprise less than 70 mole percent of total (meth)acrylate, thiol, and ethylenically unsaturated functional groups and wherein the photocure includes reaction of the thiol group with the ethylenically unsaturated group, provided at least some of the molecules comprise three or more functional groups. The chemical mechanical polishing pad can be made by additive manufacturing using stereolithography.

Abstract: A chemical mechanical polishing pad comprising a polishing layer that comprises a photocured polymer wherein the photocured polymer is the photoinitiated reaction product of a photocurable material that is free of molecules comprising (meth)acrylate groups and the photocurable material comprises molecules having two or more functional groups wherein the functional groups include a thiol group and ethylenically unsaturated group other than a (meth)acrylate group and the photocure includes reaction of the thiol group with the ethylenically unsaturated group, provided at least some of the molecules comprise three or more functional groups. The chemical mechanical polishing pad can be made by additive manufacturing using stereolithography.

Abstract: A polymeric bead having radius R wherein the polymer comprises 0.3% to 20% by weight, based on the weight of the polymer, of polymerized units of one or more multifunctional vinyl monomer and 80% to 99.7% by weight, based on the weight of the polymer, of polymerized units of one or more monofunctional vinyl monomer, (a) wherein the polymerized units of multifunctional vinyl monomer have radial distribution factor MR of 0.9 to 1.1, and (b) wherein some of the vinyl groups in the polymerized units of multivinyl monomer are unreacted, and the unreacted vinyl groups have a radial distribution factor VR of 2.5 or higher.

Abstract: Provided is a collection of polymeric beads, wherein the beads comprise (i) 75 to 99% by weight, based on the weight of the bead, polymerized units of monofunctional vinyl monomer, and (ii) 1 to 25% by weight, based on the weight of the bead, polymerized units of multifunctional vinyl monomer; wherein, within each bead, the average concentration of moles of polymerized units of multifunctional vinyl monomer per cubic micrometer is MVAV; wherein, within each bead, T1000 is a sequence of 1,000 unique connected polymerized monomer units; wherein, within each T1000, MVSEQ is the weight percent polymerized units of multifunctional vinyl monomer, based on the weight of T1000; wherein MVRATIO=MVSEQ/MVAV; and wherein 90% or more of the beads by volume are uniform beads, wherein a uniform bead is a bead in which 90% or more of all T1000 sequences has MVRATIO of 1.5 or less.

Abstract: Provided is a collection of polymeric beads, wherein the beads comprise (i) 75 to 99% by weight, based on the weight of the bead, polymerized units of monofunctional vinyl monomer, and (ii) 1 to 25% by weight, based on the weight of the bead, polymerized units of multifunctional vinyl monomer; wherein, within each bead, the average concentration of moles of polymerized units of multifunctional vinyl monomer per cubic micrometer is MVAV; wherein, within each bead, T1000 is a sequence of 1,000 unique connected polymerized monomer units; wherein, within each T1000, MVSEQ is the weight percent polymerized units of multifunctional vinyl monomer, based on the weight of T1000; wherein MVRATIO=MVSEQ/MVAV; and wherein 90% or more of the beads by volume are uniform beads, wherein a uniform bead is a bead in which 90% or more of all T1000 sequences has MVRATIO of 1.5 or less.

Abstract: A polymeric bead having radius R wherein the polymer comprises 0.3% to 20% by weight, based on the weight of the polymer, of polymerized units of one or more multifunctional vinyl monomer and 80% to 99.7% by weight, based on the weight of the polymer, of polymerized units of one or more monofunctional vinyl monomer, (a) wherein the polymerized units of multifunctional vinyl monomer have radial distribution factor MR of 0.9 to 1.1, and (b) wherein some of the vinyl groups in the polymerized units of multivinyl monomer are unreacted, and the unreacted vinyl groups have a radial distribution factor VR of 2.5 or higher.

Abstract: An effective and reliable automated FT-IR method for diagnosing and identifying differences in composition of chemical samples as compared to corresponding standards.

Abstract: An effective, accurate and reliable spectroscopic method for detecting differences in composition of chemical samples as compared to corresponding standards is described. The method is based on a set match scores covering a plurality of spectral regions. The method allows a user to determine if a sample matches its corresponding standard by evaluating if the match scores are comparable to previously measured standard values.