Volume Shrinkage and Internal Pigmentability for Low-Shrink Umsaturated Polyester Resins:Effect of Saturated Polyester-Based and Vinyl Acetate-Based Block Copolymer Types of Low-Profile
碩士 === 國立臺灣科技大學 === 化學工程系 === 90 === Abstract The effects of five series of low-profile additives(LPA)，including(i) reactive vinyl acetate/methyl methacrylate block copolymer (VAc-b-MMA),(ii) saturated polyester， on the volume shrinkage characteristics and internal pigmentabili...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2002
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| Online Access: | http://ndltd.ncl.edu.tw/handle/32560096895242351417 |
| Summary: | 碩士 === 國立臺灣科技大學 === 化學工程系 === 90 === Abstract
The effects of five series of low-profile additives(LPA)，including(i) reactive vinyl acetate/methyl methacrylate block copolymer (VAc-b-MMA),(ii) saturated polyester， on the volume shrinkage characteristics and internal pigmentability for the low-shrinkage unsaturated polyester resin(UP) after the cure at 30℃ were investigated. The reactive LPAs were synthesized by suspension polymerizations using polymeric peroxides(PPO) as initiator.These LPAs are reactive since there are peroxide linkages in their backbones，which are capable of thermal decomposition during cure，and may participate in the free radical crosslinking copolymerizations for the ST/UP/LPA/system.The experimental results have been explained by phase characteristic of the Styrene/UP/LPA system before the cure,cured sample morphology and volume fraction of microvoid generated during the cure.
(Keywords: reactive poly(methyl methacrylate) ; reactive methyl methacrylate/vinyl acetate block copolymer; reactive vinyl acetate/styrene block copolymer; saturated polyester ;
vinyl chloride-vinyl acetate random copolymer;
low profile additives(LPA);unsaturated polyester resin(UP) volume shrinkage; pigmentability)
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