Gelation in free-radical terpolymerization of poly(allyl methacrylate) crosslinked polymer nanosphere with allyl benzoate and vinyl benzoate

Matsumoto, Akira; Fujihashi, Masato; Aota, Hiroyuki

doi:10.1016/s0014-3057(03)00124-1

Cited by 7 publications

(3 citation statements)

References 28 publications

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“…These reactive CPNs with abundant pendant allyl groups could be utilized to construct different types of CSMs. [55] Furthermore, considering that TAIC-NPP contains abundant pendant allyl groups, we attempted to construct novel CSMs by combining rigid TAIC-NPP with NPPs consisting of flexible chains, leading to reduction of the brittleness of TAIC resin. Also, four types of looped and nanogel-like methacrylate-NPPs with pendant methacryloyl groups or with pendant allyl groups were molecularly designed by free-radical crosslinking multiallyl/multivinyl copolymerizations as modules to construct novel CSMs.…”

Section: Construction Of Crosslink-systemmaterials Utilizing Designedmentioning

confidence: 99%

Construction of Crosslink‐System‐Materials Utilizing Designed Network‐Polymer‐Precursor Modules

Matsumoto

2011

Macromolecular Symposia

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Summary: For a long time, we have been concerned with the elucidation of network formation mechanism of free-radical crosslinking (co)polymerization of multivinyl monomers. We have pursued two extreme network structures formation such as ideal and nanogel-like NPP formation. During the course of these investigations, we recognized that a network polymer may be reconsidered as a crosslink-systemmaterial (CSM) or a giant system consisting of network polymer precursor (NPP) modules. The network polymer is not a giant molecule as a smallest unit of matter which could behave as one molecule. According to this definition, our subject may be changed from the molecular design of network polymer to the molecular design of NPP based on the free-radical crosslinking multivinyl polymerization mechanism. Then, we could construct a variety of CSMs utilizing designed NPP modules. A variety of CSM constructions are exemplified.

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Section: Construction Of Crosslink-systemmaterials Utilizing Designedmentioning

confidence: 99%

Construction of Crosslink‐System‐Materials Utilizing Designed Network‐Polymer‐Precursor Modules

Matsumoto

2011

Macromolecular Symposia

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“…This type of polymerization was shown2 to progress on vinyl groups giving poly(allyl methacrylate) (PAMA (II)), which has a molecular weight of about 10 4 . Most of the reported free radical polymerization3–10 gives insoluble gel‐type polymers. However, Higgins and Weale4 obtained soluble polymers when free radical polymerization was carried out in the solution.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of poly(allyl methacrylate) obtained by γ‐radiation

Vardareli

Usanmaz

2007

J of Applied Polymer Sci

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Allyl methacrylate was polymerized by g-radiation under vacuum in solution and atom transfer radical polymerization (ATRP) methods and also in the presence of atmospheric oxygen in bulk. The kinetic curve is S-type with a longer induction period, because of the presence of oxygen, in bulk polymerization. The curve for the solution polymerization is almost linear with a short induction period. The rate started to decrease after about 60% conversion and reached to a limiting conversion of 100%. The polymerization by ARTP method using g-radiation as initiator instead of conventional heating method gave a kinetic curve of linear character up to about limiting conversion of 100%. The polymers obtained were mostly gel type with linear chain fractions at lower conversions. The polymer characterizations were carried out by FTIR, differential scanning calorimetry, NMR, TGA, and XRD methods. The polymers were shown to proceed by the opening of vinyl groups. The allyl groups caused a limiting crosslinking, but 98-99% of the allyl groups are shown by FTIR and NMR, unchanged during the polymerization. The cyclic type polymer formation was not likely taking place.

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“…11 VB is involved in the preparation of polymeric nanoparticles, and the control of VB content plays an important role in gel formation. 12 Surfactant micelles containing SB structures can be transformed into thread-like micelles by isomerization to cis -stilbene under ultraviolet (UV) light. 13 A photoresponsive molecular switch has also been designed based on the photosensitivity of stilbene.…”

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confidence: 99%

The graft polymerization of vinyl benzoate and trans-stilbene onto polyurethane to control its mechanical and shape memory properties

Chung

Bae

Chun

2016

Textile Research Journal

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Vinyl benzoate (VB series) and trans-stilbene (SB series) were added onto polyurethane (PU) via graft polymerization, and the spectroscopic, thermal, tensile, shape memory, and low-temperature flexibility properties of the resulting polymers were compared with those of unmodified PU. The melting temperature (Tm) and glass transition temperature (Tg) of the soft segments are not significantly different for the VB and SB series compared with unmodified PU. The tensile strengths of the VB and SB series sharply increase with increasing vinyl polymer content, whereas the control series does not exhibit an increase in tensile strength. The VB series exhibits excellent shape recovery at 10℃ compared with unmodified PU, and the shape recovery of the SB series remains above 90% at 45℃. The shape retention values of the VB (−45℃) and SB series (–25℃) are not less than 90%. The selected PUs demonstrate better flexibilities at extremely low temperatures compared with unmodified PU. Therefore, the graft polymerization of vinyl benzoate or trans-stilbene onto PU improves the tensile strength, shape recovery at low temperatures, and low-temperature flexibility of the polymer without decreasing the tensile strain or shape retention.

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Gelation in free-radical terpolymerization of poly(allyl methacrylate) crosslinked polymer nanosphere with allyl benzoate and vinyl benzoate

Cited by 7 publications

References 28 publications

Construction of Crosslink‐System‐Materials Utilizing Designed Network‐Polymer‐Precursor Modules

Construction of Crosslink‐System‐Materials Utilizing Designed Network‐Polymer‐Precursor Modules

Synthesis and characterization of poly(allyl methacrylate) obtained by γ‐radiation

The graft polymerization of vinyl benzoate and trans-stilbene onto polyurethane to control its mechanical and shape memory properties

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