Carboxylation Of A Polypentenamer And Preparation Of Its Hydrogenated Derivatives, William Macknight, H. Tanaka
Dec 1978
Carboxylation Of A Polypentenamer And Preparation Of Its Hydrogenated Derivatives, William Macknight, H. Tanaka
William MacKnight
No abstract provided.
Sulfonation Of A Polypentenamer And Preparation Of Its Hydrogenated Derivatives, William Macknight, D. Rahrig, R. W. Lenz
Dec 1978
Sulfonation Of A Polypentenamer And Preparation Of Its Hydrogenated Derivatives, William Macknight, D. Rahrig, R. W. Lenz
William MacKnight
Polypentenamer has been sulfonated using a 1:1 complex of sulfur trioxide and triethyl phosphate in chloroform. A range of polymers containing from 1.9 to 19. l mo! % sulfonate groups was prepared by this reagent and isolated in the form of sodium salts. These materials are initially free from covalent cross-links but cross-linking occurs with aging unless the polymers are stabilized with a free-radical scavenger such as hydroquinone. The unsaturated bonds in these materials can be removed by hydrogenation with ptoluenesulfonyl hydrazide. The hydrogenated derivatives are crystalline and no longer require a stabilizer to inhibit cross-linking. Both the unsaturated and …
Dynamic Mechanical And Dielectric Properties Of Phosphonylated Polypentenamers And Their Hydrogenated Derivatives, William Macknight, D. Rahrig, C. Azuma
Dec 1977
Dynamic Mechanical And Dielectric Properties Of Phosphonylated Polypentenamers And Their Hydrogenated Derivatives, William Macknight, D. Rahrig, C. Azuma
William MacKnight
Dynamic mechanical and dielectric properties of substituted polypentenamers with phosphonate side groups and their hydrogenated derivatives have been studied. Methyl esters, acids, and salts were investigated at two concentrations, 6.5 and 11.1 mole percent. In the unhydrogenated derivatives, one principal relaxation, labeled fl, is observed mechanically in the temperature range from -160 to 100°C. This {J relaxation arises from micro-Brownian segmental motion accompanying the glass transition. Its temperature is substantially affected by the substituent concentration while its breadth is affected by the chemical nature of the substituent. An extended "rubbery plateau" region exists in the acid and salt derivatives. The …
Phosphonylation Of A Polypentenamer And Preparation Of Its Hydrogenated Derivatives, William Macknight, C. Azuma
Dec 1976
Phosphonylation Of A Polypentenamer And Preparation Of Its Hydrogenated Derivatives, William Macknight, C. Azuma
William MacKnight
No abstract provided.
Dynamic Mechanical Properties Of Polypentenamers With Pendant Ionic Groups And Their Hydrogenated Derivatives, William Macknight, K. Sanui
Dec 1975
Dynamic Mechanical Properties Of Polypentenamers With Pendant Ionic Groups And Their Hydrogenated Derivatives, William Macknight, K. Sanui
William MacKnight
No abstract provided.
Relaxations In Cyano-Substitued Polypentenamers And Their Hydrogenated Derivatives, William Macknight, R. Neumann, K. Sanui
Dec 1974
Relaxations In Cyano-Substitued Polypentenamers And Their Hydrogenated Derivatives, William Macknight, R. Neumann, K. Sanui
William MacKnight
Two series of cyano-substituted polypentenamers and ·their hydrogenated derivatives have been studied by dynamic mechanical and dielectric relaxation in the temperature range from -160 to 110°C and at frequencies from 3.5 Hz to 10 kHz. Series I contains 7.4 mol % cyano groups and series II contains 20 mol % cyano groups. The amorphous cyanopolypentenamers display one major mechanical and dielectric relaxation region associated with motions accompanying the glass transition and labeled /3. A small secondary relaxation, labeled 'Y, is also discernible in the mechanical E" results. The semicrystalline hydrogenated derivatives exhibit three relaxation regions labeled a, /3, and 'Y …
Dynamic Mechanical Properties Of A Polypentenamer And Its Hydrogenated Derivatives, William Macknight, K. Sanui, R. W. Lenz
Dec 1973
Dynamic Mechanical Properties Of A Polypentenamer And Its Hydrogenated Derivatives, William Macknight, K. Sanui, R. W. Lenz
William MacKnight
ABSTRACT: A dynamic mechanical study has been carried out on· a polypentenamer and its hydrogenated derivatives. The temperature range was from -160 to 130° and frequencies of 3.5, 11, and 110 Hz were employed. The starting polypentenamer was amorphous and the completely hydrogenated derivative resembled linear polyethylene with a melting point of 130° and a degree of crystallinity of 85%. Three relaxation regions were found in the temperature and frequency range investigated and these are labeled a, {:J, and -y in order of decreasing temperature. The a relaxation (5-115°, 3.5 Hz) is absent in the amorphous polymers and those of …
Preparation Of A Polypentenamer Having Pendant Ionic Groups And Its Hydrogenated Derivatives, William Macknight, K. Sanui, R. W. Lenz
Dec 1973
Preparation Of A Polypentenamer Having Pendant Ionic Groups And Its Hydrogenated Derivatives, William Macknight, K. Sanui, R. W. Lenz
William MacKnight
Polypentenamers having pendant carboxylate groups including esters, acids, and salts and their[hydrogenated derivatives have been prepared and characterized, and some of. their properties investigated. Reaction conditions were established to control the amount of pendant thioglycolate groups incorporated into the polypentenamer by the free-radical addition reactions of thioglycolic acid derivatives and subsequently to completely hydrogenate the polymers so formed, which contained thioglycolate contents ranging from less than 1 mole-% to about 16 mole-%, without backbone degradation and crosslinking reactions. The glass transition temperatures and the melting points of these polymers were observed to depend upon the pendant group content, as expected, …
