Wiley
0025-116X
0025-116X
Cơ quản chủ quản: N/A
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Các bài báo tiêu biểu
Crystalline forms of isotactic polypropyleneAbstract The X‐ray diffraction patterns of two crystalline forms of isotactic polypropylene, the β‐ and γ‐forms distinct from the α‐form described by NATTA1 , have been recorded. The β‐form, previously observed only as single spherulites6 has now been obtained in a well crystalline polymer, practically free of α‐form. The γ‐f... ... hiện toàn bộ
Tập 75 Số 1 - Trang 134-158 - 1964
Catalyse de transformation des oléfines par les complexes du tungstène. II. Télomérisation des oléfines cycliques en présence d'oléfines acycliquesAbstract La co‐réaction des oléfines cycliques avec les oléfines acycliques en présence des systèmes WOCl4 /Al(C2 H5 )2 Cl et WOCl4 /Sn(C4 H9 )4 conduit à une télomérisation de l'oléfine cyclique; aux extrém... ... hiện toàn bộ
Tập 141 Số 1 - Trang 161-176 - 1971
Synthesis of substrate‐selective polymers by host‐guest polymerization
Tập 182 Số 2 - Trang 687-692 - 1981
Topochemical polymerization of monomers with conjugated triple bondsAbstract Solid‐state polymerization of monomers with conjugated triple bonds turns out to be a versatile method for synthesis of crystalline polymers of high molecular weight exhibiting a fully conjugated backbone. The reaction is best described as an 1.4‐addition polymerization of the conjugated triple bonds giving rise to a polymer with three cumulated double bond... ... hiện toàn bộ
Tập 154 Số 1 - Trang 35-48 - 1972
Permeability of solutes through hydrated polymer membranes. Part I. Diffusion of sodium chlorideAbstract Based on an analysis by the free volume theory of diffusion, a study of the diffusion coefficients, D2 , the distribution coefficients, κ2 , and the permeability coefficients, P, of NaCl in various hydrophilic polymers was made with the assumptions that the free volume of a polymer/diluent system is linearly proportio... ... hiện toàn bộ
Tập 118 Số 1 - Trang 19-35 - 1968
Topochemical reactions of monomers with conjugated triple‐bonds. IV. Polymerization of bis‐(p‐toluene sulfonate) of 2.4‐hexadiin‐1.6‐diolAbstract Solid‐state polymerization of the bis‐(p ‐toluene sulfonate) of 2.4‐hexadiin‐1.6‐diol was achieved by UV‐irradiation or by annealing the monomer crystals below their melting‐point. Deep red polymer crystals having the original shape of the monomer crystals exhibiting strong dichroism are obtained. Polymerization proceeds by 1.4‐add... ... hiện toàn bộ
Tập 145 Số 1 - Trang 85-94 - 1971
Synthesis and phase behaviour of liquid crystalline polyacrylatesAbstract The synthesis and phase behaviour of a series of polymers having liquid crystalline sidechains and a poly(acrylic acid) backbone are described. These polymers show a dependence of the phase transition temperatures on molecular weight. In copolymers of two liquid crystalline acrylic esters, induced smectic phases occur. A comparison of the phase transitions ... ... hiện toàn bộ
Tập 183 Số 10 - Trang 2311-2321 - 1982
Thermal analysis of poly(butylene terephthalate) for heat capacity, rigid‐amorphous content, and transition behaviorAbstract Thermal analysis was performed on poly(butylene terephthalate), PBT, between 210 and 560 K. By combination of experimental heat capacities with computations with an approximate frequency spectrum of 65 group and 19 skeletal vibrations, preliminary recommended ATHAS (1988) heat capacities are proposed for the solid state from 0 to 600 K. The Tarasov paramete... ... hiện toàn bộ
Tập 189 Số 10 - Trang 2443-2458 - 1988
ÜBer den einfluß der lösungsmittel auf die struktur linearer makromoleküle. IAbstract Es werden einige Methoden angegeben, nach denen der von ausgeschlossenen Volumeneffekten unbeeinflußte Trägheitsradius 〈R0 2 〉1/2 bestimmt werden kann. Die theoretische Forderung LIFSONS , daß selbst dieser Trägheitsradius noch vom Lösungsmittel abhängt und sich im allgemeinen vo... ... hiện toàn bộ
Tập 50 Số 1 - Trang 20-36 - 1961
Einfluß der kristallstruktur und der überstruktur auf einige eigenschaften von polypropylenAbstract Isotaktisches Polypropylen bildet bei der Kristallisation vier verschiedene Typen von Sphärolithen, die nach PADDEN und KEITH als Typ I bis IV bezeichnet werden. Die Typen I und II zeigen eine monokline Kristallstruktur, während die Typen III und IV pseudohexagonal kristallisieren. Die Sphärolithe vom Typ III und IV sin... ... hiện toàn bộ
Tập 109 Số 1 - Trang 204-216 - 1967