Control of adhesive strength of acrylate polymers containing 1-isobutoxyethyl and isobornyl esters in response to dual stimuli for dismantlable adhesion

Applied Adhesion Science

Table 1 Synthesis of block copolymers by TERP

Code	First-step polymerization					Second-step polymerization
Code	iBEA/IBoA^a	Time (h)	Conversion of iBEA/IBoA (%)	M _n/10⁴	M _w/M _n	2EHA/HEA^a	Time (h)	Conversion of iBEA/IBoA/2EHA/HEA^b (%)
B1	1050/0	9	58/–	2.3	1.16	1650/300	13	66/0/65/80
B2	600/300	22	59/25	3.1	1.31	2200/300	8	75/31/62/69

Polymerization conditions: [AMVN]/[AIBN] = 1.4/1.0 in the molar ratio to the DPDT and iBEA/anisole = 1/1 in weight at 60 °C. The homopolymerization of iBEA or the copolymerization of iBEA and IBoA was carried out during the first-step polymerization, and then 2EHA and HEA were added to synthesize the block copolymers during the second-step polymerization
^a Molar ratio to DPDT
^b The conversions for iBEA and IBoA indicate the total values of the first- and second-step polymerizations