The authors have attempted to estimate the proportion of the two types of methylenelinkages in novolac resins i.e., the o-o′ and o-p- type, by use of the infra-red absorptionmethod. This method has already briefly been reported by H.L.Bender, although the details havenot been described. In estimating the above-mentioned proportion, 2.4-xylenol and 2.6-xylenolwere selected respectively as standard of the two types of linkages. Ortho cresol or paracresol was also selected as referance standard, in order to estimate the proportion of the saidlinkages in cases of lower molecular weight novolacs such as o-o′-diphenylolmethane etc. It was found that the ratio of absorption coefficient was practically identical in both standards, sothere would be no contradiction in estimating lower molecular weight novolacs. A tetrahydrofuranand carbon disulphide mixture (2: 1, volumetric) was suitable for analysis. It has beenconfirmed that the higher the o-o′-linkage content, the shorter the cure time. The cure timeobservation was carried out according to Benders' Method.

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The following creep and recovery formulae of wool were derived experimentally as in those of rayon and vinylon fiber
where ε and ε′ signify total elongation due to loading and recovery shrinkage due to unloadingrespectively, σ tensile stress, E₀ and E₀′ moduli of elasticity at loading and unloading, ε_R totalrelaxative elongation, t and t'duration of loading or time after unloading, λ and λ'relaxationor recovery relaxation time, b creep constant, α and α′ creep and creep recovery delayed time, and m and n ratio of creep to recovery.These constants are affected by stress, temperature, humidity, and loading time.

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The author has intended to systematize high polymer substances by means of composition systems, seeking for arrangement principles as well as combination principles and has come to propose a hypothesis that, with growing of innumerable linear high polymers, high polymer bundles of textured structure are formed (Fig. IId, IIe, IIf).High polymer bundles in the liquid state or solution state combine themselves at their ends to develop into a linear, plane network or spacial net-work structure.When solidifying, the spacial net-work structure is changed into a plane net-work structure and then drawn into a linear structure to form a larger bundle (Fig.2).This large bundle may be a fine fibril and developes into a larger fibril and finally composes a single fiber and other high polymer substances.The composition of high polymer bundle, fine fibril, larger fibril and single fiber follows the same principles and all of them show the similar structure such as parallel, spiral and braided structure.The structure of fibril was called a textured micelle structure (Fig.3).Under the hypothesis of textured micelle structure, the interior structure and property of high polymer substances are discussed.When dissolving, the fibril may be disintegrated so far as in basic high polymer bundles which can exist in undulating long-stretched form.In a dilute solution, the form of bundle may be changed and high polymers in the bundle behave as if separated individual polymers.As the first development of high polymer science, H.Staudinger made the assumption that in a sufficiently diluted solution, a high polymer substances is dispersed into separate individual polymers which should take a long-stretched form. The Staudinger's hypothesis can be supported only under the assumption that individual polymers are bound in a structure of bundle.But the dissolved particle is not a single high polymer but a group of high polymers which are connected by steric structural force.

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The change of Huggins'constant k′ by the condition of KPS-NaHS03 redox polymerization of acrylonitrile was studied.The polymer was prepared according to the previous paper, and the following results were obtained.
(1) The concentration of monomer and catalyser provoke the great change of k′, but the polymerization temperature and the addition of CH₃OH show the slight effect.
(2) The polymers in which k′=0.28-0.33 are obtained by the reaction of 1 parts monomer, 0.01-0.03 parts KPS (and NaHSO₃) and 15-20 parts H₂O at 30-40 C for 40 min.

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The Influence of concentration on the viscosity of dilute solution containing 0.5-15grpolyacrylonitrile per 1.000cc dimechylforamide was studied by the Ostwald-type capillary viscometerat 30°C.The intrinsic viscosity-relative viscosity relationship was found to be
[η]=K(η_rel^1/K-1)/c, K=3

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Isopropenyl isocyanate has been synthesized with 92% yield by the modified procedure ofCurtius'rearrangement from methacrylyl chloride and characterized. Monomer reactivityratios have been determined for six systems of isopropenyl isocyanate with acrylonitrile (I), methyl acrilate (II), ethyl acrylate (III), vinylidene chloride (IV), methyl metha-acrylate (V), and styrene (VI), for mass method of copolymerization.
(I)γ₁=0.24±0.02, γ₂=0.10±0.11
(II)γ₁ 0.69±0.03, γ₂ 0.11±0.04
(III)γ₁ 0.79±0.11, γ₂ 0.15±0.07
(IV)γ₁ 0.85±0.04, γ₂ 0.31±0.02
(V)γ₁ 3.10±0.29, γ₂ 0.14±0.10
(VI)γ₁ 8.12±0.00, γ₂ 0.07±0.00
A comparision of the γ₁, γ₂ products shows that isopropenyl isocyanate alternates with the electron acceptive monomers (acrylonitrile etc.) better than with electron donative monomers (styrene etc.).

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Polyvinylamino acetal (PVAA) and co-poly acid saponified from co-polymer of vinyl acetateand methyl acrylate were used.When the same quantity of these two solutions were mixed, the precipitation, turbidity or coacervation was observed in the range of critical concentration. If C_B (C_A) and C (A) represent the mol-fraction of -COOH(-NH₂) in co-polyacid (PVAA) andthe percentage of its content respectively, the critical concentration of the turbidity was C_A=C_B=10^-4N independent of A and C, and the degree of turbidity was the highest at the pointof C_A=C_B.

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